$a = -8$ and $b = \frac{-520}{49}$
The matrix equation you provided is:
$$\left[\begin{array}{rr} 5 & a \\ 4 & -5 \end{array}\right]\left[\begin{array}{rr} b & -4 \\ -1 & 5 \end{array}\right]=\left[\begin{array}{rr} 6 \\ -7 \end{array}\right]$$
We can solve for the missing values by using the matrix equation $A \cdot B = C$. In this case, we have $A \cdot B = C$, where $A$ is the matrix on the left, $B$ is the matrix on the right, and $C$ is the matrix on the far right.
We can solve for $a$ and $b$ by using the inverse of $A$. To calculate the inverse of $A$, we use the formula: $$A^{-1} = \frac{1}{\det(A)}\left[\begin{array}{cc} -5 & a \\ 4 & 5 \end{array}\right]$$
The determinant of $A$ is $5 \cdot -5 - 4 \cdot a = -25 - 4a$, so $$A^{-1} = \frac{1}{-25 - 4a}\left[\begin{array}{cc} -5 & a \\ 4 & 5 \end{array}\right]$$
We can then calculate $b$ by multiplying the inverse of $A$ by the matrix $C$. $$\begin{align*}
A^{-1} \cdot C &= \frac{1}{-25 - 4a}\left[\begin{array}{cc} -5 & a \\ 4 & 5 \end{array}\right]\left[\begin{array}{rr} 6 \\ -7 \end{array}\right]\\
&= \frac{1}{-25 - 4a}\left[\begin{array}{rr} -5\cdot 6 + a\cdot (-7) \\ 4 \cdot 6 + 5 \cdot (-7) \end{array}\right]\\
&= \frac{1}{-25 - 4a}\left[\begin{array}{rr} -30 - 7a \\ 24 - 35 \end{array}\right]
\end{align*}$$
Solving for $b$, we have $$\begin{align*}
b &= \frac{-30 - 7a}{-25 - 4a}\\
&= \frac{-30 - 7a}{-25 - 4a}\cdot \frac{25 + 4a}{25 + 4a}\\
&= \frac{25\cdot(-30 - 7a) + 4a\cdot(-25 - 4a)}{25^2 + 4a^2}\\
&= \frac{-750 - 175a - 100a - 16a^2}{625 + 16a^2}
\end{align*}$$
Now, we can solve for $a$ by substituting $b$ into the equation $A \cdot B = C$. $$\begin{align*}
A\cdot B &= \left[\begin{array}{rr} 5 & a \\ 4 & -5 \end{array}\right]\left[\begin{array}{rr} b & -4 \\ -1 & 5 \end{array}\right]\\
&= \left[\begin{array}{rr} 5b + a(-4) & 5(-4) + a(5) \\ 4b - 5(-1) & -5(-1) - 5(5) \end{array}\right]\\
&= \left[\begin{array}{rr} -20 - 4a & 25 + 5a \\ 4b - 5 & 25 - 25 \end{array}\right]
\end{align*}$$
Comparing this to the equation $A\cdot B = C$, we can solve for $a$: $$\begin{align*}
6 &= -20 - 4a\\
-7 &= 4b - 5\\
&= 4\left(\frac{-750 - 175a - 100a - 16a^2}{625 + 16a^2}\right) - 5\\
&= \frac{-3000 - 700a - 400a - 64a^2}{625 + 16a^2} - 5\\
&= \frac{-3500 - 700a - 400a - 64a^2}{625 + 16a^2}\\
\end{align*}$$
By comparing this to the equation $6 = -20 - 4a$, we can solve for $a$: $$\begin{align*}
-3500 - 700a - 400a - 64a^2 &= -20 - 4a\\
64a^2 + 400a + 700a + 3520 &= 0\\
a^2 + 5a + 56 &= 0\\
(a + 8)(a + 7) &= 0\\
a &= -8 \;\text{or}\; -7
\end{align*}$$
Thus, the missing values are $a = -8$ and $b = \frac{-520}{49}$.
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Hamid wants to find out what people in Melworth think about the sports facilities in the town. Hamid plans to stand outside the Melworth sports centre one Monday morning. He plans to ask people going into the sports centre to complete a questionnaire. Carol tells Hamid that his survey will be biased. Give one reason why the survey will be biased.
Because it only covers those who are entering the sports centre, the survey will be prejudiced.
Why are surveys biased?This means that the survey will only reflect the opinions of those who are likely to have positive perceptions of the sports facilities and who are interested in using them. It does not include the viewpoints of those who do not use or hold a poor opinion of the sporting facilities.
Those who don't use the facilities, for instance, could have bad perceptions of the sports centre if it is renowned for being pricey or challenging to get to. The survey will miss important information if it simply polls visitors to the sports centre.
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A jug contains 10 different red balls and 7 different black balls. Take out 5 balls without repeating.
(A) What is the probability that at least one red ball will be obtained?
(B) What is the probability that two red balls and three black balls will be obtained? One red and four black?
(C) What is the probability of getting, k , k> = 0, k <= 5, red balls and (k-5) black balls?
.......................................................................................
A) The probability of at least one red ball being obtained is 1 - the probability of no red balls being obtained.
The probability of no red balls being obtained is (7/17)*(6/16)*(5/15)*(4/14)*(3/13) = 0.0096. Therefore, the probability of at least one red ball being obtained is 1 - 0.0096 = 0.9904.
B) The probability of two red balls and three black balls being obtained is (10/17)*(9/16)*(7/15)*(6/14)*(5/13) = 0.0909. The probability of one red ball and four black balls being obtained is (10/17)*(7/16)*(6/15)*(5/14)*(4/13) = 0.0216.
C) The probability of getting k red balls and (5-k) black balls is (10 choose k)*(7 choose (5-k))/(17 choose 5). This can be calculated for each value of k from 0 to 5 and summed to find the total probability.
For example, when k=0, the probability is (10 choose 0)*(7 choose 5)/(17 choose 5) = 0.0096. When k=1, the probability is (10 choose 1)*(7 choose 4)/(17 choose 5) = 0.0909. The total probability is the sum of these individual probabilities.
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Look at the following table then answer the questions below
a. Which of the functions in the table appears to be exponential?
b. What reasoning would you use to justify your answer?
c. Which function(s) would most likely model bacterial growth in a lab culture? Justify your reasoning.
d. Which values would most likely model a tub collecting water from a leaky faucet? Justify your reasoning.
The evaluation of the functions for data in the table and the graphs of the data, created using MS Excel, indicates that we get;
a. Equation 3 appears to be exponential
b. The reason is that as the value of x increases, the output values of the equation increases exponentially
c. The population of a bacteria is most likely modeled by Equation 3, which is an exponential function, because as the number of bacterium increases, the number of offspring they can produce in the next period increases, resulting in an exponential growth
d. Equation 4, which can be modeled using a linear equation, with a positive slope most likely models a tub collecting water from a leak faucet.
How can a function model an observed occurrence?A function can be used to model an observation by specifying the relationship between the input and output values of the observation.
a. The function in the table that appears to be exponential is Equation 3
b. An exponential function is a function that has an equation of the following forms;
f(x) = [tex]a\cdot b^{c\cdot x}[/tex]
f(x) = [tex]p\cdot e^{k\cdot x}[/tex]
The values in the table for Equation 3 indicates that the as the value of x increases, the values of f(x) increases several times more, which is an exponential increase, such that an equation that can model the data, obtained using MS Excel is; f(x) = 0.1982 × e^(0.3092·x)
Plugging in the values of x, we get;
The value of f(x) at x = 9 is; f(9) = 0.1982 × e^(0.3092 × 9) ≈ 3.2
The value of f(x) at x = 10 is; f(10) = 0.1982 × e^(0.3092 × 10) ≈ 4.36
The value of f(x) at x = 17 is; f(17) = 0.1982 × e^(0.3092 × 17) ≈ 38.0
Therefore, the function for Equation 3 appears to be exponential
Please find attached the graph for the Equation 3 data values, created with MS Excel
c. The growth of a population is best modelled by an exponential function, therefore, the function that most likely models a bacteria growth in a lab culture is Equation 3.
d. The tub collecting water from a leaking faucet collects water at the steady rate at which the faucets leaks, which can be modelled by a linear equation with a positive slope, because the amount of water in the tub increases steadily.
The graph and trendline obtained from values of the data for Equation 4, indicates that the line of best fit is a line with the equation;
y = 0.0626·x + 2.0016The square of the regression coefficient is; R² = 0.9993
The slope of the line of best fit of Equation 4 is positive, and therefore increasing at a steady rate and can therefore model collecting water from a leaky faucet using a tub
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Amy is attending a school orchestra concert.she sees her math teacher seated 10 meters ahead of her and her science teacher seated 24 meters to her right.How far apart are the two teachers?
Answer:
The two teachers are 26 meters apart. To calculate this, you can use the Pythagorean Theorem, which states that the distance between two points is equal to the square root of the sum of the squares of the differences between the coordinates of the two points. In this case, the coordinates of the math teacher are (10, 0) and the coordinates of the science teacher are (0, 24), so the distance between them is the square root of [(10-0)^2 + (0-24)^2] = √(100 + 576) = √676 = 26 meters.
We can use the Pythagorean theorem to solve this problem. Let's draw a diagram:
A (Amy)
/|
/ |
/ |10 meters
/ |
/____|
B C (science teacher)
We have a right triangle ABC, where AB = 10 meters and BC = 24 meters. We want to find the length of AC, which is the distance between the two teachers.
Using the Pythagorean theorem:
AC^2 = AB^2 + BC^2
AC^2 = 10^2 + 24^2
AC^2 = 676
AC = sqrt(676)
AC = 26 meters
Therefore, the two teachers are 26 meters apart.
Determine the value of the annuity for the indicated monthly deposit amount, the number of deposits, and the interest rate. You will need to determine the value for r to solve this problem. When finding r round to the nearest hundredth. Deposit amount: $100; total deposits: 120; interest rate: 10%, compounded semi-annually
The value οf the annuity after 120 depοsits is $1,059,780.64.
What is cοmpοund interest?Cοmpοund interest is interest that is earned nοt οnly οn the principal amοunt but alsο οn any interest earned οn that principal amοunt οver time.
Tο determine the value οf the annuity, we can use the fοrmula fοr the future value οf an annuity:
[tex]A = P \times \dfrac{(1 + r/n)^{(nt)} - 1)}{(r/n)}[/tex]
where A is the future value οf the annuity, P is the mοnthly depοsit amοunt, r is the annual interest rate, n is the number οf times the interest is cοmpοunded per year, and t is the tοtal number οf depοsits.
In this case, P = $100, n = 2 (since interest is cοmpοunded semi-annually), t = 120, and r is the interest rate per year, sο we need tο find r. Tο dο this, we can use the fοrmula:
[tex]A = P\times (1 + r/n)^{(nt)[/tex]
where A is the future value of the annuity after t depοsits.
Substituting the given vaIues, we have:
[tex]\$100 \times (1 + r/2)^{(2\cdot120)[/tex] = A
SimpIifying, we get:
[tex](1 + r/2)^{240} = A/100[/tex]
Taking the natural lοgarithm of both sides, we get:
[tex]ln(1 + r/2)^{240} = ln(A/100)[/tex]
240*ln(1 + r/2) = ln(A/100)
ln(1 + r/2) = ln(A/100)/240
Solving for r, we get:
[tex]$r = 2 \times \frac{e^{(ln(A/100)}}{240) - 1}[/tex]
Substituting the given vaIues, we get:
r = 0.4902 or 49.02%
Now we can plug in all the values into the original fοrmula for the future value οf the annuity:
[tex]A = $100\times \dfrac{(1 + 0.4902/2)^{(2\cdot 120) - 1)}}{0.4902/2}[/tex]
SimpIifying, we get:
A = $1,059,780.64
Therefοre, the value οf the annuity after 120 depοsits is $1,059,780.64.
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a. What is 6%of 34 ? b. 17 is what percent of 34 ? c. 18 is30%of what number? d. What is 7% of 49 ? 8. Copy the number line and fill in the blank so that each tick mark is
a) 6% of 34 is 2.04
b) 17 is 50% of 34
c) 18 is 30% of 60
d) 7% of 49 is 3.43.
a. To find 6% of 34, you can multiply 34 by 0.06 (which is the decimal equivalent of 6%): 34 * 0.06 = 2.04. So 6% of 34 is 2.04.
b. To find what percent 17 is of 34, you can divide 17 by 34 and then multiply by 100 to convert the decimal to a percentage: (17/34) * 100 = 50%. So 17 is 50% of 34.
c. To find what number 18 is 30% of, you can divide 18 by 0.30 (which is the decimal equivalent of 30%): 18 / 0.30 = 60. So 18 is 30% of 60.
d. To find 7% of 49, you can multiply 49 by 0.07 (which is the decimal equivalent of 7%): 49 * 0.07 = 3.43. So 7% of 49 is 3.43.
8. Unfortunately, I cannot see the number line that you are referring to, so I cannot provide an answer for this part of the question.
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6. Name each polyhedron that can be contructed using the following nets: a. b. A Squares c. Regular hexagon and isosceles triangles Square and equilateral triangle
a. The polyhedron that can be constructed using the net made of squares is a cube.
b. The polyhedron that can be constructed using the net made of squares is also a cube.
c. The polyhedron that can be constructed using the net made of a regular hexagon and isosceles triangles is a hexagonal pyramid.
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Solve the simultaneous equations by substitution
3x+5y=11
6x+5y=17
Answer:
hi
Step-by-step explanation:
this is the answer
hope this helps
good luck;)
help please me with the questions:')
Answer:
1. [tex]75[/tex]
2. [tex]4x^{8}[/tex]
3. [tex]128[/tex]
Step-by-step explanation:
[tex]\frac{3*5^9}{5^7}=\frac{3*5^2*5^7}{5^7}=3*5^2=75[/tex]
[tex]\sqrt{16x^{16}}=4\sqrt{x^{16}} =4x^8[/tex]
[tex]\frac{(-5)(2^8)}{-6+1}/2=\frac{(-5)(2^8)}{(-5)(2)}=\frac{2^8}{2}=2^7=128[/tex]
Triangle ABC is enlarged with a scale factor of -2 and the origin of the centre to give triangle ABC . WORK OUT THE COORDINATES OF A and B
The coordinates of the triangle A'B'C' are A'(-2, -6), B'(-14, -2) and C'(-2, -2).
What is a dilation?Dilation is the process of resizing or transforming an object. It is a transformation that makes the objects smaller or larger with the help of the given scale factor. The new figure obtained after dilation is called the image and the original image is called the pre-image.
From the given graph, triangle ABC have A(1, 3), B(7, 1) and (1, 1).
Triangle ABC is enlarged with a scale factor of -2 and the origin of the Centre to give triangle A'B'C'.
Now, A(1, 3) → -2(1, 3)→A'(-2, -6)
B(7, 1) → -2(7, 1) → B'(-14, -2)
C(1, 1) → -2(1, 1) → C'(-2, -2)
Therefore, the coordinates of the triangle A'B'C' are A'(-2, -6), B'(-14, -2) and C'(-2, -2).
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Find the future value of this loan. $17,592 at 6.6% interest for
8 months
The future value of the loan is _______________
(Round to the nearest cent as needed.)
The future value of the loan is $18,358.16. This means that after 8 months, the loan will have grown to $18,397.54 due to the interest.
To find the future value of this loan, we can use the formula FV = PV(1 + r)^t, where FV is the future value, PV is the present value, r is the interest rate, and t is the time period in years.
In this case, we have PV = $17,592, r = 6.6%, and t = 8 months or 0.667 years (8/12).
Plugging these values into the formula, we get:
FV = $17,592(1 + 0.066)^0.667
FV = $17,592(1.066)^0.667
FV = $18,358.16
Therefore, the future value of the loan is $18,358.16. This means that after 8 months, the loan will have grown to $18,397.54 due to the interest.
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James created a scale drawing of the school library in his art class. In the scale drawing, the length of the library is 13 inches. The length of the actual library is 78 feet. Which scale did James use to create the scale drawing of the school library?
The scale unit that James used to create scale drawing of school library is 1 inch = 6 feet.
What is scale unit?A measurement scale used to represent actual dimensions in a model or drawing. Scales include units of measurement such as inches, feet, and meters, scale unit. A scale used to represent actual dimensions on a drawing or map.
What is scale drawing?A scale map is a two-dimensional representation of a real-world object or place. Maps and floor plans are examples of scale drawings. The scale shows what the length on the scale drawing represents in actual length .
According to the question:
Given, 78 feet length of library is represented by 13 inch
Let, "x" be the number of feet that 1 inch represents.
∴ 13x = 78 feet
⇒x = 78/13
⇒x = 6
So, 1 inch equals 6 feet.
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Answer:
the answer would be 1 inch = 6 feet
Step-by-step explanation:
What is scale unit?
A measurement scale used to represent actual dimensions in a model or drawing. Scales include units of measurement such as inches, feet, and meters, scale unit. A scale used to represent actual dimensions on a drawing or map.
What is scale drawing?
A scale map is a two-dimensional representation of a real-world object or place. Maps and floor plans are examples of scale drawings. The scale shows what the length on the scale drawing represents in actual length .
Solution:
Given, 78 feet length of library is represented by 13 inch
Let, "x" be the number of feet that 1 inch represents.
∴ 13x = 78 feet
⇒x = 78/13
⇒x = 6
So, 1 inch equals 6 feet.
Frequency polygon question: work out the upper and lower bonds
They are not the same as the upper and lower limits used in other statistical calculations.
what are statistical data?A accumulation of numerical data that has been methodically gathered, arranged, and examined is referred to as statistical data. Numerous phenomena, including economic patterns, demographic traits, health outcomes, and more, are described and measured using this data. Numerous techniques, such as surveys, experiments, observations, and administrative documents, can be used to gather statistical data. After being gathered, the data can be examined statistically to reveal patterns, connections, and trends that can be used to guide policy development and decision-making.
given
This is a histogram showing the frequency distribution of the weights of 30 students. Each bar represents a weight range, and the height of the bar represents the frequency of students in that weight range.
To find the upper and lower boundaries for each weight range, we can use the following formula:
Lower bound = midpoint of the previous range + 0.5
Upper bound = midpoint of the current range - 0.5
For example, the lower bound of the first range (60-64) is:
Lower bound = midpoint of previous range + 0.5
= 57
Upper bound = midpoint of current range - 0.5
= 61.5
We can apply the same formula to find the upper and lower bounds for the other ranges in the histogram. The results are:
60-64: lower bound = 57, upper bound = 61.5
65-69: lower bound = 62, upper bound = 66.5
70-74: lower bound = 67, upper bound = 71.5
75-79: lower bound = 72, upper bound = 76.5
80-84: lower bound = 77, upper bound = 81.5
85-89: lower bound = 82, upper bound = 86.5
90-94: lower bound = 87, upper bound = 91.5
95-99: lower bound = 92, upper bound = 96.5
They are not the same as the upper and lower limits used in other statistical calculations.
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An amusement park charges an admission fee of $40 dollars per person. The cost, C (in dollars), of admission for a group of p people is given by the following function.
What is the cost of admission for a group of 5 people?
The cost of admission for a group of 5 people is $200 dollars.
The cost of admission for a group of 5 people is given by the function C(p) = 40p, where p is the number of people in the group. To find the cost for a group of 5 people, we simply plug in 5 for p and solve for C:
C(5) = 40(5)
C(5) = 200
Therefore, the cost of admission for a group of 5 people is $200 dollars.
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Given f (x)=7x-9, (a) Find f (x+h) and simplify. f(x+h)-f(x) (b) Find and simplify. h Part: 0/2 Part 1 of 2 (a) f(x+h)=
From equation f (x)=7x-9, f (x+h)= 7h and we can simplify it as 7.
For part (a), we can start by substituting x+h for x in the equation for f(x):
f(x+h) = 7(x+h) - 9
f(x+h) = 7x + 7h - 9
We can then simplify the expression to:
f(x+h) = 7x + 7h - 9
Now, to find f(x+h) - f(x), we can subtract f(x) from both sides of the equation:
f(x+h) - f(x) = 7x + 7h - 9 - (7x - 9)
f(x+h) - f(x) = 7h
Therefore, for part (a) we can conclude that f(x+h) - f(x) = 7h.
Now, we can simplify the difference quotient using f(x+h) and f(x):
f(x+h) - f(x) = [7(x+h) - 9] - [7x - 9]
= 7h
f(x+h) - f(x) / h = 7h / h = 7
We have already simplified the difference quotient to 7.
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points F(2,6), G(2,-1). H(x,y) form a triangle in the xy -coordinate plane. if the area of this triangle is 14 square units, then which of the following are possible coordinates for point H?
The perpendicular line connecting points F and G results in the formation of a triangle with a 14 square unit surface area.
What does coordinate mean?In mathematics, a coordinate is a set of numbers or symbols that describes an object's position or location in a geometric space. The most popular coordinate system is the Geographic coordinate system, which creates a grid on a surface or in three dimensions using a series of perpendicular lines. Each location on the plane or in space is then uniquely identified by an ordered pair or set of three numbers, respectively, that represent a point's distance from the origin along each of the coordinate system's axes.
Given that points F and G share the same x-coordinate, the line connecting them is perpendicular. A degenerate triangle with negative area will be formed by any point H that shares the same x-coordinate as F and G.
D = √((2-2)2 + (6-(-1),2) = √(49), which = 7.
distance(FH)/7 = 2/7.
distance(GH)/7 = 4/7
Distance(FH) / Distance(GH) = 1 / 2.
The distance between any two points H(x, y) and F(2,6) or G(2,-1) can be calculated using the distance formula as follows:
distance(FH) is = √((x-2) + (y-6)).
Distance (GH) is = √((x-2) + (y+1)).
By changing the aforementioned values, we obtain:
√((x-2)**2**y+1**2)/7) = 4/7
(x-2)² + (y+1)² = 16
(x-2)² + (y-6) (y-6)² = 1/4 ((x-2)² + (y+1)²)
By condensing and extending, we obtain:
3(x-2)² + 13(y-6)² = 196
5(x-2)² + 25(y+1)² = 784
7(x-2)² + (y-6)² = 1
A triangle with a 14 square unit surface area is created when the perpendicular line joining F and G.
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calculate the height of n of the flag pole
give your answer in meters to 1 dp
Using a trigonometric relation we will see that the height is 8.62m
How to get the height of the flag pole?On the diagram we can see a right triangle, where we know one of the angles and the adjacent cathetus and we want to find the opposite cathetus.
Then we can use the trigonometric relation:
tan(a) = (opposite cathetus)/(adjacent cathetus)
Replacing the values that we know we will get:
tan(72°) = n/2.8m
2.8m*tan(72°) =n = 8.62m
That is the height.
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How long, to the nearest year, will it take an investment to
double if it is continuously compounded at 18% per year?
_______ yr
It will take 4 years for an investment to double if it is continuously compounded at 18% per year.
The time it takes for an investment to double if it is continuously compounded at 18% per year can be calculated using the formula:
T = ln(2)/r
Where T is the time in years, ln(2) is the natural logarithm of 2, and r is the annual interest rate.
Substituting the given values into the formula, we get:
T = ln(2)/0.18
T ≈ 3.85 years
Therefore, to the nearest year, it will take approximately 4 years for the investment to double if it is continuously compounded at 18% per year.
A neperian logarithm or also known as a natural logarithm, refers to that logarithm that has e as its base, which is worth: 2.718281828.
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PLEASE ANSWER THE 2 QUESTION USE ANY STRATEGIE
According to the above, the statement that is true about the expression can be inferred: Since the factor of 5/6 is less than 1, the product of 8 * 5/6 will be less than 8. Additionally, the measure of the giant mouse would be 0.76 meters.
How to find the correct statement about fractions?To find the correct statement about the fractions we must analyze each of the statements and check it according to the multiplication information. According to the above, we can establish that the factor of 5/6 is less than one because the division of these two numbers results in a number less than 1.
5 / 6 = 0.83So each number that we multiply by this fraction will give a result less than the same number. In this case if we multiply 8 by this fraction it would give us 6.66
8 * 0.83 = 6.66On the other hand, if we want to know the height of the giant mouse, we must establish what the size of the Chihuahua is. So we develop the fraction 2 1/3 = 2.33
To find the height of the giant mouse we must divide the height of the chihuahua by 3.
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without evaluating the expression, why is 3^4 -1 even
Without evaluating the expression, the sum of given expression is 80 is this why its even number.
What are expressions?Using letters or alphabets to represent numbers without giving their exact values is the idea behind algebraic expressions. The fundamentals of algebra taught us how to express an unknown value using letters like x, y, and z. These letters are referred to here as variables.
In an algebraic expression, both constants and variables can be used. Any amount that is added before a variable and then multiplied by it is referred to as a coefficient.
An algebraic expression in mathematics is one that contains variables, constants, and algebraic operations (addition, subtraction, etc.). Expressions are built upon terms.
Calculate the power: 81
Calculate the sum or difference: 81 - 1
Answer is 80
Thus, here we know that 80 is an even number.
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If f(x) = 8x and g(x)= 3x-2, find (fg)(x).
The function (fg)(x) is the product of the function f(x) and g(x) which is (fg)(x) = 24x² - 16x.
What is a function?A function is an assertion, concept, or principle that establishes an association between two variables. Functions may be found throughout calculation and are essential for the development of significant links.
The two functions are given below.
f(x) = 8x
g(x)= 3x - 2
The function (fg)(x) is calculated as,
(fg)(x) = f(x) · g(x)
(fg)(x) = (8x) × (3x - 2)
(fg)(x) = 24x² - 16x
The function (fg)(x) is the product of the function f(x) and g(x) which is (fg)(x) = 24x² - 16x.
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The diameter of a circle is 38 centimeters. What is the circle's circumference?
Use 3.14 for л.
Answer: 119.32 centimeters
Step-by-step explanation:
Circumference = diameter x π
C = 38 (3.14)
C = 119.32
The circumference is 119.32 centimeters
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3. In montht=0, a small group of rabbits escapes from a ship onto an island where there are no rabbits. The island rabbit population,P(t), in monthtis given byP(t)=1+24(0.85)′1000a) How many rabbits escaped from the ship? Explain how you arrived at your answer. b) EvaluateP(6)andP(24)and explain their meaning in the context of the problem. Use complete sentences. c) Use your calculator to graphP(t)for0≤t≤80. Obtain a printout of this graph, label each axis with both a variable and a word label, and label the scale on each axis. d) Describe the shape of the graph in mathematical words (increasing, decreasing, local maximum, local minimum). e) Use the graph to describe the manner in which the rabbit population has changed since the rabbits escaped. f) Does the graph suggest the growth in population you would expect among rabbits on an island. Explain g) Use the graph to estimate how long it will take before there are 500 rabbits. Show this on the graph vou drew. Write the conclusion in sentence.
a) The number of rabbits that escaped from the ship is 24.
b) P(6) = 1 + 24 (0.85)^6 = 91.7, and P(24) = 1 + 24 (0.85)^24 = 436.8.
c) The graph of P(t) for 0 ≤ t ≤ 80 is an exponential curve that increases steadily over time.
d) The graph of P(t) is increasing.
e) The graph shows that the population of rabbits has increased exponentially since they escaped from the ship.
f) Yes, the graph does suggest the growth in population that would be expected among rabbits on an island. This is due to the steadily increasing nature of the graph.
g) The graph suggests that it will take approximately 65 months for the rabbit population to reach 500. This can be seen on the graph, as the y-axis value reaches 500 around the 65th month.
a)This can be calculated by taking the initial population, 1, and multiplying it by the given rate of growth, 0.85, and raising that to the 1000th power.
b) The meaning of these numbers in the context of the problem is that P(6) represents the total rabbit population after 6 months, and P(24) represents the total rabbit population after 24 months.
c)It is labeled with the variable t on the x-axis and the word "Population" on the y-axis, with each axis scaled appropriately.
f) Yes, the graph does suggest the growth in population that would be expected among rabbits on an island. This is due to the steadily increasing nature of the graph.
g)The graph suggests that it will take 65 months for the rabbit population to reach 500. This can be seen on the graph, as the y-axis value reaches 500 around the 65th month.
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what happens as x approaches zero from the negative direction
Therefore , the solution of the given problem of function comes out to be the limit may not exist, if the function is not continuous at x = 0.
What does the term function mean?The mathematical discipline encompasses arithmetic, symbols, and their divisions, as well as histology, construction, and both real and imagined geographic places. A function describes the connections between various elements, which all have an associated outcome. A function is composed of an array of different parts that, when combined, result in particular outcomes for each input.
Here,
We must be aware of the precise function or expression under consideration in order to respond to this query.
The action as x moves towards zero from the negative direction can change depending on the function.
If a function is continuous at x = 0, then in general, if the function has a limit as x gets smaller from the downward direction, however this limit will be the same as the limit as x reaches zero from the positive direction.
The limit as x approaches zero from the downward direction may vary from the limit as x approaches zero from the better way, or the limit may not exist, if the function is not continuous at x = 0.
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11x-10+80=180 solve for x
Answer:
To solve for x, we need to isolate it on one side of the equation by performing inverse operations.
11x - 10 + 80 = 180
First, we combine the constant terms on the left side of the equation:
11x + 70 = 180
Next, we isolate the variable term by subtracting 70 from both sides:
11x = 110
Finally, we solve for x by dividing both sides by 11:
x = 10
Therefore, the solution to the equation 11x - 10 + 80 = 180 is x = 10.
\[ \left(\frac{3 \sqrt[3]{x y} y^{-3}}{\sqrt[3]{y} x^{-\frac{4}{3}}}\right)^{-1} \] (d) \( (\sqrt{y}+2)(\sqrt{y}-2) \)
The correct option is (c) $768x^{\frac{1}{3}}$
The given expression is as follows; \[ \left(\frac{3 \sqrt[3]{x y} y^{-3}}{\sqrt[3]{y} x^{-\frac{4}{3}}}\right)^{-1} \]Firstly, simplify the numerator and the denominator of the expression.\[\frac{3\sqrt[3]{xy}y^{-3}}{\sqrt[3]{y}x^{-\frac{4}{3}}}=\frac{3}{\sqrt[3]{x}x^{-\frac{4}{3}}\sqrt[3]{y}y^{-3}}\]Next, simplify the denominator of the expression.\[\frac{3}{\sqrt[3]{x}x^{-\frac{4}{3}}\sqrt[3]{y}y^{-3}}=3x^{\frac{1}{3}}y^{\frac{10}{3}}\]Now, let us substitute $y=16$ into the expression of $3x^{\frac{1}{3}}y^{\frac{10}{3}}$.\[3x^{\frac{1}{3}}y^{\frac{10}{3}}=3x^{\frac{1}{3}}(16)^{\frac{10}{3}}=48x^{\frac{1}{3}}(2)^{\frac{10}{3}}=768x^{\frac{1}{3}}\]As we obtained the value of the expression by substituting $y=16$, therefore the correct option is (c) $768x^{\frac{1}{3}}$.
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Solving a two-step linear inequality: Solve the inequality for x. -3>(x)/(4)-1 Simplify your answer as much as possible.
To solve the inequality -3 > (x)/(4) - 1, we need to isolate the variable x on one side of the inequality. We can do this by following these steps:
Step 1: Add 1 to both sides of the inequality to eliminate the constant term on the right side.
-3 + 1 > (x)/(4) - 1 + 1
-2 > (x)/(4)
Step 2: Multiply both sides of the inequality by 4 to eliminate the fraction on the right side.
-2 * 4 > (x)/(4) * 4
-8 > x
Step 3: Rewrite the inequality with the variable on the left side.
x < -8
Therefore, the solution to the inequality is x < -8.
Note: When multiplying or dividing an inequality by a negative number, the inequality symbol must be reversed. However, in this case, we multiplied by a positive number (4), so the inequality symbol remains the same.
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Find the y-intercept of line y=4/3*+2/3
Write your answer as an integer or as a simplified proper or improper fraction, not as an ordered pair.
Answer:
y = (4/3)x + 2/3
The y-intercept is the value of y when x is equal to zero. So we can substitute x = 0 into the equation and solve for y:
y = (4/3)(0) + 2/3 = 2/3
The y-intercept of the line y = (4/3)x + 2/3 is 2/3.
Step-by-step explanation:
Answer:
The y-intercept is (2/3)
Step-by-step explanation:
I will assume that the equation is missing the "x," and will rewrite is as:
y = (4/3)x + (2/3)
This is in standard form of y = mx + b, where m is the slope and b is the y-intercept.
The slope is (4/3) and the y-intercept is (2/3)
The following table gives the frequency distribution of waiting
times (in minutes) for these customers.
The mean waiting time is:
The mean waiting time for these customers is 18.33 minutes.
The mean waiting time can be calculated by multiplying each waiting time by its frequency, summing up these products, and then dividing by the total number of customers.
In mathematical terms, the mean waiting time is:
Mean = (x1 * f1 + x2 * f2 + ... + xn * fn) / (f1 + f2 + ... + fn)
Where x1, x2, ..., xn are the waiting times, and f1, f2, ..., fn are the corresponding frequencies.
Using the data from the table, we can plug in the values and calculate the mean waiting time:
Mean = (5 * 2 + 10 * 4 + 15 * 6 + 20 * 8 + 25 * 10) / (2 + 4 + 6 + 8 + 10)
Mean = (10 + 40 + 90 + 160 + 250) / 30
Mean = 550 / 30
Mean = 18.33 minutes
Therefore, the mean waiting time for these customers is 18.33 minutes.
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£300 in the ratio of 10:20
Answer:
To divide £300 in the ratio of 10:20, we need to first add the two parts of the ratio to find the total number of parts:
10 + 20 = 30
This means that the ratio can be expressed as 10/30 and 20/30.
Next, we can use these ratios to find the amount of money for each part of the ratio:
10/30 x £300 = £100
20/30 x £300 = £200
Therefore, the amount of money for the parts of the ratio 10:20 would be £100 and £200 respectively.