Answer: Your welcome!
Step-by-step explanation:
Part A: 2x^2 + 3x^2 - 4 + 3xy + 6 + 6 = 7x^2 - 4xy + 6
Part B: 0 = 7x^2 - 4xy + 6 - (2x^2 + 3x^2 - 4 + 3xy + 6 + 6)
= 0 = 5x^2 - 4xy
A) The expression that represents the amount of canned food collected by the three friends is [tex]5x^2 + 3xy + 2[/tex].
B) The expression that represents the number of cans the friends still need to collect to meet their goal is [tex]2x^2 - 7xy + 4[/tex].
Given: Number of cans collected
Jessa: 2x²
Tyree: 3x² - 4
Ben: 3xy + 6
Goal : [tex](7x^2 - 4xy + 6)[/tex]
A) The total amount collected:
Total = Jessa + Tyree + Ben
= [tex]2x^2 + (3x^2 - 4) + (3xy + 6)[/tex]
= [tex]2x^2 + 3x^2 - 4 + 3xy + 6[/tex]
= [tex](2x^2 + 3x^2 + 3xy) + (-4 + 6)[/tex]
= [tex]5x^2 + 3xy + 2[/tex]
Therefore, the expression is [tex]5x^2 + 3xy + 2[/tex].
B) The number of cans the friends still need to collect to meet their goal is
Cans still needed = Goal - Total
[tex]= (7x^2 - 4xy + 6) - (5x^2 + 3xy + 2)[/tex]
[tex]= 7x^2 - 4xy + 6 - 5x^2 - 3xy - 2[/tex]
[tex]= (7x^2 - 5x^2) + (-4xy - 3xy) + (6 - 2)[/tex]
[tex]= 2x^2 - 7xy + 4[/tex]
Therefore, the expression is [tex]2x^2 - 7xy + 4[/tex].
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FIrst Question: What proportion of U.S. residents receive a jury summons each year? A polling organization plans to survey a random sample of 500 U.S. residents to find out. Let P^
be the proportion of residents in the sample who received a jury summons in the previous 12 months. According to the National Center for State Courts, 15% of U.S. residents receive a jury summons each year. Suppose that this claim is true.
What sample size would be required to reduce the standard deviation of the sampling distribution to one-half the original value?
Second Question: A USA Today poll asked a random sample of 1012 U.S. adults what they do with the milk in their cereal bowl after they have eaten. Let p^
be the proportion of people in the sample who drink the cereal milk. A spokesman for the dairy industry claims that 70% of all U.S. adults drink the cereal milk. Suppose this claim is true.
What sample size would be required to reduce the standard deviation of the sampling distribution to one-half the original value?
a sample size of approximately 246 U.S. adults would be required to reduce the standard deviation of the sampling distribution to one-half the original value.
what is the standard deviation?The standard deviation is a metric that reveals how much variance from the mean there is, including spread, dispersion, and spread. A "typical" variation from the mean is shown by the standard deviation. Because it uses the data set's original units of measurement, it is a well-liked measure of variability.
from the question:
Assuming a 95% confidence interval and an error rate equal to half the initial standard deviation, or E = 0.5, the following results are obtained:
[tex]n = [(1.96 / 0.5σ) / 0.70(1 - 0.70)]^2[/tex]
The population's standard deviation must be known in order to solve for n; however, this information is not provided in the problem description. Based on prior research or experience, we may substitute a standard deviation of 0.05 into the following formula:
[tex]n = [(1.96 / 0.5(0.05)) / 0.70(1 - 0.70)]^2 ≈ 246[/tex]
Hence, to cut the standard deviation of the sampling distribution to half its initial value, a sample size of about 246 American adults would be needed.
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solve pls
3x+5y=15
x+y=3
Answer:
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
(
0
,
−
3
)
Equation Form:
x
=
0
,
y
=
−
3
Step-by-step explanation:
Answer:
x=0 y=3
Step-by-step explanation:
3(0) + 5(3) = 15
0 + 15 = 15
15=15
Show that the associationA \mapsto g_{A}is an isomorphism between the space of m x n matrices with coefficients in K and the space of bilinear forms in Km x Kn
The associationA \mapsto g_{A} is an isomorphism between the space of m x n matrices with coefficients in K and the space of bilinear forms in Km x Kn.
The associationA \mapsto g_{A} is an isomorphism between the space of m x n matrices with coefficients in K and the space of bilinear forms in Km x Kn if it satisfies the following conditions:
1. It is a one-to-one correspondence, meaning that for every matrix A there is a unique bilinear form g_{A} and vice versa.
2. It preserves the structure of the spaces, meaning that the operations of addition and scalar multiplication are preserved.
To show that the associationA \mapsto g_{A} is a one-to-one correspondence, we can start by assuming that g_{A} = g_{B} for two matrices A and B. Then, for any vectors u \in Km and v \in Kn, we have:
g_{A}(u,v) = g_{B}(u,v)
A \cdot (u \otimes v) = B \cdot (u \otimes v)
(A - B) \cdot (u \otimes v) = 0
Since this is true for all u and v, we can conclude that A - B = 0, or A = B. This means that the associationA \mapsto g_{A} is a one-to-one correspondence.
To show that the associationA \mapsto g_{A} preserves the structure of the spaces, we can start by considering the addition of two matrices A and B and the scalar multiplication of a matrix A by a scalar c. Then, for any vectors u \in Km and v \in Kn, we have:
g_{A + B}(u,v) = (A + B) \cdot (u \otimes v) = A \cdot (u \otimes v) + B \cdot (u \otimes v) = g_{A}(u,v) + g_{B}(u,v)
g_{cA}(u,v) = (cA) \cdot (u \otimes v) = c(A \cdot (u \otimes v)) = c g_{A}(u,v)
This means that the associationA \mapsto g_{A} preserves the operations of addition and scalar multiplication.
Therefore, the associationA \mapsto g_{A} is an isomorphism between the space of m x n matrices with coefficients in K and the space of bilinear forms in Km x Kn.
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1. Let the point \( P \) be \( (-1,3) \) and the point \( Q \) be \( (3,7) \). Find the following. a. \( \mathbf{v}=\overrightarrow{P Q} \) b. \( \|\mathbf{v}\| \) c. \( \overrightarrow{P Q}+\overrigh
The answers are:
a. \( \mathbf{v}=\overrightarrow{P Q} = (4, 4) \)
b. \( \|\mathbf{v}\| = 4\sqrt{2} \)
c. \( \overrightarrow{P Q}+\overrightarrow{Q P} = (0, 0) \)
The given points are point \( P \) be \( (-1,3) \) and point \( Q \) be \( (3,7) \).
a. To find \( \mathbf{v}=\overrightarrow{P Q} \), we subtract the coordinates of point \( P \) from the coordinates of point \( Q \):
\( \mathbf{v}=\overrightarrow{P Q} = (3-(-1), 7-3) = (4, 4) \)
b. To find \( \|\mathbf{v}\| \), we use the distance formula:
\( \|\mathbf{v}\| = \sqrt{(4-0)^2 + (4-0)^2} = \sqrt{16 + 16} = \sqrt{32} = 4\sqrt{2} \)
c. To find \( \overrightarrow{P Q}+\overrightarrow{Q P} \), we add the coordinates of \( \overrightarrow{P Q} \) and \( \overrightarrow{Q P} \):
\( \overrightarrow{P Q}+\overrightarrow{Q P} = (4, 4) + (-4, -4) = (0, 0) \)
Therefore, the answers are:
a. \( \mathbf{v}=\overrightarrow{P Q} = (4, 4) \)
b. \( \|\mathbf{v}\| = 4\sqrt{2} \)
c. \( \overrightarrow{P Q}+\overrightarrow{Q P} = (0, 0) \)
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The average salary of 36 employee was 4650. Using historical data, we will assume that the population standard deviation is 165. Find the 98% confidence interval for the population mean salary.
Select one:
a. 4650±63.97
b. 4650±67.05
c. 4650±70.84
d. 4650±45.24
e. 4650±74.91
f. 4650±53.90
g. 4650±46.48
h. 4650±55.83
The average salary of 36 employee was 4650. Using historical data, we will assume that the population standard deviation is 165. The 98% confidence interval for the population mean salary is 4650±70.84. The correct answer is option c. 4650±70.84.
To find the 98% confidence interval for the population mean salary, we will use the formula:
CI = X ± Z* (σ/√n)
Where:
CI = Confidence Interval
X = Sample mean
Z = Z-score for the given confidence level
σ = Population standard deviation
n = Sample size
Plugging in the given values, we get:
CI = 4650 ± 2.33* (165/√36)
CI = 4650 ± 70.84
Therefore, the 98% confidence interval for the population mean salary is 4650±70.84. The correct answer is C.
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Determine where functions are continuous: (a) f(x)=(9x^(2)-4)/(3x-2) (b) f(x)=x2^(sinx) (c) f(x)=sin(1)/(2x) (d) f(x)={(x^(2)-1,x>3),(8,n=3),(2^(x),x<3):}
The functions are continuous at all points except where the denominator of a fraction is equal to zero. This is because division by zero is undefined and causes a discontinuity in the function.
(a) f(x)=(9x^(2)-4)/(3x-2): This function is continuous everywhere except where 3x-2=0, which is when x=2/3. Therefore, the function is continuous at all points except x=2/3.
(b) f(x)=x2^(sinx): This function is continuous everywhere because there are no denominators that could equal zero.
(c) f(x)=sin(1)/(2x): This function is continuous everywhere except where 2x=0, which is when x=0. Therefore, the function is continuous at all points except x=0.
(d) f(x)={(x^(2)-1,x>3),(8,n=3),(2^(x),x<3):} This function is continuous for x>3 and x<3, but there is a discontinuity at x=3 because the function is not defined for x=3. Therefore, the function is continuous at all points except x=3.
In conclusion, the functions are continuous at all points except where the denominator of a fraction is equal to zero, causing a discontinuity. The functions are continuous at all other points.
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The continuity of a function can be determined by examining the values of the function at different points in its domain. If the function is continuous at a point, it means that the limit of the function as it approaches that point from both the left and the right is equal to the value of the function at that point. A function is continuous over an interval if it is continuous at every point in that interval.
(a) The function f(x)=(9x^(2)-4)/(3x-2) is continuous everywhere except at x = 2/3, where the denominator is equal to zero and the function is undefined.
(b) The function f(x)=x2^(sinx) is continuous everywhere. The exponential function 2^(sinx) is continuous for all values of x, and the product of two continuous functions is also continuous.
(c) The function f(x)=sin(1)/(2x) is continuous everywhere except at x = 0, where the denominator is equal to zero and the function is undefined.
(d) The function f(x)={(x^(2)-1,x>3),(8,n=3),(2^(x),x<3):} is continuous for x > 3 and x < 3, but it is not continuous at x = 3, where there is a jump discontinuity from 8 to 2^(3).
In conclusion, the functions are continuous at the following points:
(a) f(x)=(9x^(2)-4)/(3x-2): continuous everywhere except at x = 2/3
(b) f(x)=x2^(sinx): continuous everywhere
(c) f(x)=sin(1)/(2x): continuous everywhere except at x = 0
(d) f(x)={(x^(2)-1,x>3),(8,n=3),(2^(x),x<3):}: continuous for x > 3 and x < 3, but not continuous at x = 3
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How much of a 40% antifreeze solution must a mechanic mix with an 80% antifreeze solution if 16 gallons of a 50% antifreeze solution are needed?
The mechanic must mix 12 gallons of a 40% antifreeze solution with 4 gallons of an 80% antifreeze solution to create 16 gallons of a 50% antifreeze solution.
To find out how much of a 40% antifreeze solution must be mixed with an 80% antifreeze solution to create 16 gallons of a 50% antifreeze solution, we can use the following equation:
40% x + 80% y = 50% (16)
Where x is the amount of 40% antifreeze solution and y is the amount of 80% antifreeze solution.
We can also use the fact that the total amount of solution must equal 16 gallons:
x + y = 16
Now we can solve for one variable in terms of the other. Let's solve for x in the second equation:
x = 16 - y
And substitute this value of x into the first equation:
40% (16 - y) + 80% y = 50% (16)
Simplifying:
[tex]6.4 - 0.4y + 0.8y = 8[/tex]
0.4y = 1.6
y = 4
Now we can substitute this value of y back into the equation for x:
x = 16 - 4
x = 12
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PLEASE HELP!!!
Tanner is spray painting an arrow on the side of a building to point to the entrance of his store. The can of gold spray paint he wants to use covers up to 12 square feet. Does Tanner have enough spray paint for his arrow?
Yes, Tanner has enough spray paint for his arrow.
What is an Area?
The amount of space occupied by a flat (2-D) surface or an object's shape is known as its area. A planar figure's area is the area that its perimeter encloses. The quantity of unit squares that completely encircle the surface of a closed figure is its area. Square measurements for area include cm2 and m2.
Given : paint available in can = 12 ft²
We know that the arrow is comprised of a triangle and a rectangle.
So, the area of given arrow = area of rectangle + area of triangle
Now, area of triangle = 1/2 ×base × height
= 1/2 × 3 × (6 - 5 1/3)
= 3/2 × ( 6 - 16/3)
= 3/2 × ( 18-16)/3
= 3/2 × 2/3
= 1 ft²
Similarly, area of rectangle = length × breadth
= 5 1/3 × 2
= 16/3 × 2
= 32/3 ft²
Hence, area of arrow = area of triangle +area of rectangle
= 1 + 32/3
= 35/3 ft²
= 11.67 ft²
So, he has sufficient paint to cover the arrow.
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Which of the following equations represents a linear function?
x = 3
y equals one half times x minus 5
y equals three fourths times x squared
3x − 6 = 4
Answer:
The equation that represents a linear function is:
y equals one half times x minus 5
This is a linear equation because it has a constant rate of change, or slope, of one half. This means that for every increase of 1 in x, y will increase by 1/2. The equation is also in the standard form of a linear equation, y = mx + b, where m is the slope and b is the y-intercept.
The other equations are not linear functions:
x = 3 is a vertical line, which is not a function because it fails the vertical line test.
y equals three fourths times x squared is a quadratic function because it includes an x-squared term.
3x − 6 = 4 is a linear equation, but it is not in the standard form of y = mx + b. It can be rearranged to y = (3/1)x - 2, which is a linear equation in slope-intercept form.
Graph Y=2x on this chart thanks
Answer:
Step-by-step explanation:
The slope is 2 so rise / run = 2 / 1, or up two right one.
Helppppp What is the volume of this figure
The volume of the figure is 144 cubic inches.
What is the volume of an object?The volume of an object is the three dimensional space that it fills up. Since there are different shapes, thus their volume can be expressed with different equations.
In the given shape, divide it into two cuboid so that;
volume of a cuboid = length*width*height
volume of cuboid 1 = 12 * 2* 4
= 96
volume of cuboid 1 is 96 cubic inches.
volume of cuboid 2 = 12*4*1
= 48
Volume of the figure = 96 + 48
= 144 cubic inches
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Find f ∘ g, g ∘ f, and g ∘ g.
f(x) = x4, g(x) = 1/x
(a)
f ∘ g
(b)
g ∘ f
(c)
g ∘ g
Hello there! To find f ∘ g, g ∘ f, and g ∘ g, let's first recall the definition of function composition: given two functions f and g, their composition f ∘ g is defined as the function that results from applying g to the result of applying f to its argument. Specifically, for a given input x, we can express the composition f ∘ g as follows: (f ∘ g)(x) = f(g(x)).
Given f(x) = x4 and g(x) = 1/x, we can find each composition as follows:
(a) f ∘ g = f(g(x)) = f(1/x) = (1/x)4
(b) g ∘ f = g(f(x)) = g(x4) = 1/(x4)
(c) g ∘ g = g(g(x)) = g(1/x) = 1/(1/x) = x
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Find the area of the trapezoid.
Answer:
area = (1/2) · (p + q) · h
Step-by-step explanation:
PLEASE HELP :((( show BOTH distribution and FOIL to find the product of (3x - 2)and(2z + 6).
According to the given information product of (3x - 2) and (2z + 6) is 6xz + 18x - 4z - 12.
What is expression ?In mathematics, expressions are also combinations of constants, variables, operators, and function calls that represent mathematical operations or relationships.
According to given conditions:Let's start with distributing the first term of the first expression to both terms of the second expression, then distributing the second term of the first expression to both terms of the second expression:
(3x - 2)(2z + 6)
= 3x(2z + 6) - 2(2z + 6)
= 6xz + 18x - 4z - 12
Now, let's use the FOIL method to find the same product:
(3x - 2)(2z + 6)
= 3x(2z) + 3x(6) - 2(2z) - 2(6)
= 6xz + 18x - 4z - 12
As you can see, both methods result in the same product: 6xz + 18x - 4z - 12.
Therefore, according to the given information product of (3x - 2) and (2z + 6) is 6xz + 18x - 4z - 12.
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Luis wants to buy a skateboard that usually sells for $79.28. All merchandise is discounted by 12%. What is the total cost of the skateboard If Luis has to pay a state sales tax of 8.25%. Round your intermediate calculations and answer to the nearest cent.
Answer:
The discount on the skateboard is 12% of its original price, so the discounted price is:
Discounted price = $79.28 - 0.12($79.28) = $69.78
Now we need to calculate the sales tax on the discounted price. The sales tax rate is 8.25%, so the amount of sales tax is:
Sales tax = 0.0825($69.78) = $5.76
Adding the discounted price and the sales tax, we get the total cost of the skateboard:
Total cost = $69.78 + $5.76 = $75.54
Therefore, the total cost of the skateboard, including the discount and sales tax, is $75.54.
QUICK
HELP ME PLS
I NEED ERGENT HELP
Answer:
Step-by-step explanation:
For any cube the total edge length is equal to 12n, with n being the length of an edge side. Knowing this:
Cube A - Total edge length = 12(3) or 36
Cube B - 12(5) or 60
Cube C - 12(9.5) or 114
If any cube has edge length s, the total edge length is 12s
Hope this helps!
HELLOOOO PLEASE HELP ME 15 POINTS!!!!!
Answer: C
Step-by-step explanation: Just replace x=1,2,3,4 to see which answers satisfy the given conditions
Using the integer root theorem, list out all possibl (e)/(c)andidate integer roots of f(x)=-x^(5)+22x^(4)-8x^(3)-8x^(2)+5x+100. Use commas to separate.
The Integer Root Theorem states that the possible integer roots of a polynomial are the divisors of the constant term (100). Therefore, the candidate integer roots for the polynomial [tex]f(x) = -x^5 + 22x^4 - 8x^3 - 8x^2 + 5x + 100[/tex] are: 1, -1, 2, -2, 4, -4, 5, -5, 10, -10, 20, -20, 25, -25, 50, and -50.
According to the integer root theorem, the possible integer roots of a polynomial f(x) are the factors of the constant term divided by the factors of the leading coefficient. In the case of f(x)=-x^(5)+22x^(4)-8x^(3)-8x^(2)+5x+100, the constant term is 100 and the leading coefficient is -1.
The factors of 100 are: 1, 2, 4, 5, 10, 20, 25, 50, and 100. The factors of -1 are: 1 and -1.
Therefore, the possible integer roots of f(x) are: ±1, ±2, ±4, ±5, ±10, ±20, ±25, ±50, and ±100.
So, the candidate integer roots of [tex]f(x) = -x^5 + 22x^4 - 8x^3 - 8x^2 + 5x + 100[/tex] are: 1, -1, 2, -2, 4, -4, 5, -5, 10, -10, 20, -20, 25, -25, 50, -50, 100, and -100.
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Simplify each expression by performing the indici (a) z+3z; (b) z*3z; (c) -z-3z; (d) (-z)(-3z) (a) z+3z=1
The simplified expressions are: (a) z = 1/4, (b) 3z^2, (c) -4z, and (d) 3z^2.
To simplify each expression by performing the indici, we need to follow the order of operations and combine like terms. Here are the steps for each expression:
(a) z + 3z = 1
First, we need to combine the like terms on the left side of the equation. Since both terms have the variable z, we can add them together:
4z = 1
Next, we need to solve for z by isolating the variable on one side of the equation. We can do this by dividing both sides of the equation by 4:
z = 1/4
(b) z * 3z
To simplify this expression, we just need to multiply the two terms together:
3z^2
(c) -z - 3z
To simplify this expression, we need to combine the like terms. Since both terms have the variable z, we can add them together:
-4z
(d) (-z)(-3z)
To simplify this expression, we just need to multiply the two terms together. Remember that a negative times a negative is a positive:
3z^2
So the simplified expressions are: (a) z = 1/4, (b) 3z^2, (c) -4z, and (d) 3z^2.
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"Define T : R 2 → R 2 by T(~x) = T x1 x2 = 3x1 − 2x2 2x2 a) Let
~u = u1 u2 and ~v = v1 v2 be two vectors in R 2 and let c be any
scalar. Prove that T is a linear transformation. 2 b) Find the
stand"ard matrix A of T. Answer: c) Is T one-to-one? Prove your answer using the matrix A.
To prove that T is a linear transformation, we need to show that T(c~u + ~v) = cT(~u) + T(~v) for any scalar c and any vectors ~u and ~v in R2.
Let ~u = (u1, u2) and ~v = (v1, v2) be two vectors in R2 and let c be any scalar. Then,
T(c~u + ~v) = T(cu1 + v1, cu2 + v2) = (3(cu1 + v1) - 2(cu2 + v2), 2(cu2 + v2))
= (3cu1 + 3v1 - 2cu2 - 2v2, 2cu2 + 2v2)
= (3cu1 - 2cu2, 2cu2) + (3v1 - 2v2, 2v2)
= c(3u1 - 2u2, 2u2) + (3v1 - 2v2, 2v2)
= cT(~u) + T(~v)
Therefore, T is a linear transformation.
To find the standard matrix A of T, we can use the fact that T(~e1) and T(~e2) are the first and second columns of A, respectively, where ~e1 = (1, 0) and ~e2 = (0, 1) are the standard basis vectors of R2.
T(~e1) = T(1, 0) = (3(1) - 2(0), 2(0)) = (3, 0)
T(~e2) = T(0, 1) = (3(0) - 2(1), 2(1)) = (-2, 2)
Therefore, the standard matrix A of T is:
A = [ 3 -2 ]
[ 0 2 ]
To determine if T is one-to-one, we can use the fact that a linear transformation is one-to-one if and only if its standard matrix A has linearly independent columns. In this case, the columns of A are linearly independent because they are not scalar multiples of each other. Therefore, T is one-to-one. Alternatively, we can use the fact that a linear transformation is one-to-one if and only if its standard matrix A has a nonzero determinant. In this case, the determinant of A is (3)(2) - (0)(-2) = 6, which is nonzero. Therefore, T is one-to-one.
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6. Given a right triangle with leg lengths 19 inches and 17 inches, find the length of the
hypotenuse. Round to the nearest tenths.
In response to the supplied query, we may state that Therefore, the Pythagorean theorem length of the hypotenuse is approximately 25.5 inches.
what is Pythagorean theorem?The Pythagorean Theorem, often known as the Pythagorean Theorem, is the fundamental Euclidean geometry relationship between the three sides of a right triangle. The area of a square with the hypotenuse side equals the sum of the areas of squares with the other two sides, according to this rule. The Pythagorean Theorem says that the square that spans a right triangle's hypotenuse opposite the right angle equals the sum of the squares that span its sides. It is sometimes written as the general algebraic notation a2 + b2 = c2.
The Pythagorean theorem may be used to calculate the hypotenuse's length. According to the Pythagorean theorem, the square of the length of the hypotenuse (c) in a right triangle equals the sum of the squares of the lengths of the legs (a and b):
[tex]c^2 = a^2 + b^2[/tex]
[tex]c^2 = 19^2 + 17^2\\c^2 = 361 + 289\\c^2 = 650\\c =\sqrt(650)\\c = 25.5\\c = 25.5 inches[/tex]
Therefore, the length of the hypotenuse is approximately 25.5 inches.
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What was Mika's estimate and what is the actual sum of the numbers? (Look at the picture below)
Mika's estimate was 216 and the actual sum of the numbers is 216.27. The solution has been obtained by using the arithmetic operations.
What are arithmetic operations?
All real numbers are supposed to be explicable by the four fundamental operations, often known as "arithmetic operations". Quotient, product, sum, and difference are the four operations in mathematics that follow division, multiplication, addition, and subtraction.
We are given numbers as 189.27, 15.8 and 11.2.
Mika's estimate is as follows:
189 + 16 + 11 = 216
Actual sum of numbers is as follows:
189.27 + 15.8 + 11.2 = 216.27
Hence, Mika's estimate was 216 and the actual sum of the numbers is 216.27.
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Use the suggested substitution to write the expression as a
trigonometric expression. Simplify your answer as much as possible.
Assume 0≤θ≤π2.
√1−x^2, x=cos(θ)
The expression √1−x^2, with the substitution x=cos(θ), can be simplified to sin(θ).
To write the expression as a trigonometric expression using the suggested substitution, we will replace x with cos(θ) in the expression. This gives us:
√1−cos^2(θ)
Now, we can use the Pythagorean identity, sin^2(θ) + cos^2(θ) = 1, to simplify the expression further. Rearranging the identity, we get:
sin^2(θ) = 1 - cos^2(θ)
Substituting this back into our original expression, we get:
√sin^2(θ)
Taking the square root of both sides, we get:
sin(θ)
Therefore, the expression √1−x^2, with the substitution x=cos(θ), can be simplified to sin(θ).
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i need help with this answer
Jamal works as an electrician’s apprentice. He rewired 4 electrical outlets in 1 and one-halfhours. If he works at the same pace for 7.5 hours, how many outlets will he rewire?
Answer:
Below
Step-by-step explanation:
4 outlets/ 1.5 hr * 7.5 hr = 20 outlets ( see how 'hr' cancels out and you are left with 'outlets ?)
Answer: 20
Step-by-step explanation:
In 1.5 hours, the no. of electrical outlets rewired = 4
Then, in 1 hour the no. of electrical outlets rewired = 4/1.5
So, in 7.5 hours the no. of electrical outlets rewired =( 4/1.5 ) × 7.5 = 20.
For the following situation, do the following but do not solve.
1. Define variables x and y.
2. Give a complete list of constraint inequalities.
3. Give a target (objective) equation (concerning profit).
Suppose a coffee company makes two blends, Columbian Supreme and Columbian Treat. Columbian Supreme takes 12 ounces of premium beans and 4 ounces of bargain beans per bag of coffee. Columbian Treat takes 7 ounces of premium beans and 9 ounces of bargain beans per bag of coffee. Suppose that 1600 ounces of premium beans and 800 ounces of bargain beans are available. If the company profits $4 per pound of Columbian Supreme and $3.25 per pound of Columbian Treat, then how can they maximize their profit? What is the maximum profit?
equation is 4x + 3.25y
To maximize their profit, the coffee company needs to define the variables x and y, which represent the number of pounds of Columbian Supreme and Columbian Treat respectively. Then, the complete list of constraint inequalities can be written as:
Finally, the target (objective) equation is 4x + 3.25y, which represents the total profit from selling x pounds of Columbian Supreme and y pounds of Columbian Treat.
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Kaleigh binge-watched her favorite 30-minute episodes. Which representation does NOT show the amount of time Kaleigh spent watching TV at this rate?
x
x
A
C
Time (minutes)
4x D
Time Spent Watching TV
180
150
120
90
60
30
0
B y = 30x, where x represents the number of episodes watched and y represents the amount of time in minutes.
2468
Number of Episodes
Kaleigh spent 180 minutes watching 4 episodes.
Time Spent Watching TV
Episodes, x
2
4
6
8
Time (minutes), y
60
120
180
240
Answer:
Representation B does not show the amount of time Kaleigh spent watching TV at this rate. Representation B only shows the total time she would have spent based on the number of episodes watched, assuming each episode is 30 minutes long. It does not take into account the actual time it took for Kaleigh to watch the episodes, which may have varied depending on how quickly she watched them.
Step-by-step explanation:
Line Handout #1f: Find the equation of the line parallel to 3x +y=-3 through the point (3,2)
The straight line that is parallel to 3x + y = -3 and passes through point (3,2) is y = -3x + 11.
We find the slope of the given line: 3x + y= -3 can be rearranged to y = -3x - 3, which is in the slope-intercept form y = mx + b. The slope of this line is -3.
Since parallel lines have the same slope, the slope of the line we are looking for is also -3.
We use the point-slope form of an equation, y - y₁ = m(x - x₁), where m is the slope and (x₁, y₁) is the point the line passes through.
Plug in the values we have: y - 2 = -3(x - 3)
We simplify the equation: y - 2 = -3x + 9 => y = -3x + 11
Therefore, the equation of the line parallel to 3x +y=-3 through the point (3,2) is y = -3x + 11.
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Read and interpret the following conditions imposed on the variables \( a, b, c, d \), and \( x \). Determine and state whether the statements in Exercises 1 - 12 are true or false. If they are false,
The given conditions imposed on the variables \( a, b, c, d \) and \( x \) are:
\( a+b = c \) \( d = a^2 + b^2 \) \( x = a^3 + b^3 \)
To determine if the statements in Exercises 1-12 are true or false, use the given conditions to evaluate the expressions in the statement. If the statement matches the conditions, it is true; if it does not, it is false. For example, if the statement is: " \( a + b = d \) ", then this is false, as \( a + b \neq d \).
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Tanner is spray painting an arrow on the side of a building to point to the entrance of his store. The can of gold spray paint he wants to use covers up to 12 square feet. Does Tanner have enough spray paint for his arrow?
Yes, Tanner has enough spray paint for his arrow.
What is an Area?
The amount of space occupied by a flat (2-D) surface or an object's shape is known as its area. A planar figure's area is the area that its perimeter encloses. The quantity of unit squares that completely encircle the surface of a closed figure is its area. Square measurements for area include cm2 and m2.
Given : paint available in can = 12 ft²
We know that the arrow is comprised of a triangle and a rectangle.
So, the area of given arrow = area of rectangle + area of triangle
Now, area of triangle = 1/2 ×base × height
= 1/2 × 3 × (6 - 5 1/3)
= 3/2 × ( 6 - 16/3)
= 3/2 × ( 18-16)/3
= 3/2 × 2/3
= 1 ft²
Similarly, area of rectangle = length × breadth
= 5 1/3 × 2
= 16/3 × 2
= 32/3 ft²
Hence, area of arrow = area of triangle +area of rectangle
= 1 + 32/3
= 35/3 ft²
= 11.67 ft²
So, he has sufficient paint to cover the arrow.
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