When h = 4, j = 5, and k = -1, the expression jkh + hj - jk equals 5.
To solve the expression we have to substitute the value of each variable in the expression. Then simplify the expression according to mathematic rule. After solving we get the solution of the expression.
An expression is a combination of numbers, variables, and/or operations that can be evaluated or simplified to obtain a numerical or algebraic result.
The given expression is:
jkh + hj - jk
Substituting the given values of h, j, and k, we get:
jkh + hj - jk = (5 x (-1) x 4) + (5 x 4) - (5 x (-1))
Now simplify the expression
jkh + hj - jk = (-20) + 20 + 5
jkh + hj - jk = 5
Therefore, the value of jkh + hj - jk equals 5.
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Can you solve this for me please
The possible values of a are:
(i) A unique solution: a such that a² ≠ 5
(ii) Infinitely many solutions: a such that a² = 5
(iii) No solution: for all other values of a.
How to determine linear system?To solve this system of linear equations, use Gaussian elimination to reduce the augmented matrix to row echelon form. Then, examine the resulting matrix to determine the number of solutions.
The augmented matrix for the system is:
[1 2 -3 | 4 ]
[3 -1 5 | 2 ]
[4 1 a²-14 | a+2]
Using row operations, transform the matrix as follows:
[1 2 -3 | 4 ]
[0 -7 14 | -10]
[0 -7 a²-2 | a-6]
The third row is a linear combination of the first two rows, so we can eliminate it. This gives us:
[1 2 -3 | 4 ]
[0 -7 14 | -10]
Further simplify this matrix by dividing the second row by -7:
[1 2 -3 | 4 ]
[0 1 -2 | 10/7]
Use back-substitution to solve for the variables, start with the second row:
y - 2z = 10/7
Rearranging this equation:
y = 2z + 10/7
Substituting this into the first row:
x + 2(2z+10/7) - 3z = 4
Simplifying this equation:
x + (4/7)z = 18/7
So, the solution to the system is:
x = (18/7) - (4/7)z
y = 2z + 10/7
z is free
Now, examine the possible values of a:
(i) A unique solution: If the system has a unique solution, then there can be no free variables. From our solution above, we see that z is a free variable. Therefore, the system can have a unique solution only if a is such that the third row in the original augmented matrix does not reduce to a multiple of the first two rows. This is equivalent to the condition -7 ≠ a² - 2, or a² ≠ 5.
(ii) Infinitely many solutions: If the system has infinitely many solutions, then there must be at least one free variable. From our solution above, we see that z is a free variable. Therefore, the system can have infinitely many solutions for all values of a such that a² = 5.
(iii) No solution: If the system has no solution, then there must be a row in the reduced row echelon form that has all zeros except in the last column. However, our reduced matrix does not have this form. Therefore, the system has no solution for any value of a.
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Which of the following is the graph of the inverse of the function shown below? (1 point)
The graph of the inverse of the function is shown below.
What is an inverse function?In Mathematics, an inverse function simply refers to a type of function that is obtained by reversing the mathematical operation in a given function (f(x)).
From the information provided, we can logically deduce the following ordered pairs from the graph of the parent function:
x, f(x) = {(-2, 5), (-1, 1), (1, 2), (2, 3)}
In order to determine the inverse of this function f(x), we would interchange (swap) both the input value (x) and output value (y) as follows:
Inverse of f(x) = {(5, -2) (1, -1), (2, 1), (2, 3)}
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Square root of 6 rounded to the nearest hundredth
The value of expression √6 would be,
⇒ √6 = 2.4
We have to given that;
To find the value of number √6.
Now, We get;
⇒ √6 = 2.44
⇒ √6 = 2.4
Thus, The value of expression √6 would be,
⇒ √6 = 2.4
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A deposit of $2,960 is placed into a scholarship fund at the beginning of every six months for 13 years. The fund earns 7% annual interest, compounded biannually, and paid at the end of the six months. How much is in the account right after the last deposit?
The account will have $7240 after the last deposit.
Given that, $2960 is being deposited at the beginning of every six months for 13 years. The fund earns 7% annual interest, compounded biannually,
So,
When the amount is compounded biannually,
[tex]A = P(1+r/2)^{2t[/tex]
A = final amount, P = initial amount, r = rate and t = time,
[tex]A = 2960(1+0.07/2)^{2(13)[/tex]
[tex]A = 2960(1.035)^{26[/tex]
[tex]A = 7240[/tex]
Hence, the account will have $7240 after the last deposit.
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Reed wants to have a square garden plot in his backyard. He has enough compost to cover an area of 276 square feet. To the nearest tenth of a foot, how long can a side of his garden be?
The length of the side of his garden can be16.6 ft
How long can a side of his garden be?From the question, we have the following parameters that can be used in our computation:
He has enough compost to cover an area of 276 square feet.
This means that
Area = 276 276 square feet.
The area of a square is calculated as
Area = Length^2
Substitute the known values in the above equation, so, we have the following representation
Length^2 = 276
Take the square root of both sides
Length = 16.6
Hence, the length is 16.6 ft
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Find the following integrals. Can anybody solve this? Thank you.
The value of the integration is -ln|sin x - cos x| - √2 ln|sin x - cos x| - √2 ln 2
We have,
∫√(2 + cos²x)/(sec x - cosec x)
We can start by simplifying the integrand by using trigonometric identities.
sec x = 1/cos x and cosec x = 1/sin x.
So,
√(2 + cos²x)/(sec x - cosec x)
= √(2 + cos²x) / [(1/cos x) - (1/sin x)]
= √(2 + cos²x) / [(sin x - cos x) / (sin x cos x)]
= √[(2 + cos²x) sin x cos x] / (sin x - cos x)
= √[2 sin x cos x + cos⁴ x] / (sin x - cos x)
= √[sin² x + cos² x + 2 sin x cos x + cos⁴ x] / (sin x - cos x)
= √[(sin x + cos² x)²] / (sin x - cos x)
= (sin x + cos² x) / |sin x - cos x|
The absolute value sign is needed because the denominator, sin x - cos x, can be negative for certain values of x.
Now we can integrate this expression:
∫√(2 + cos²x)/(sec x - cosec x) dx
= ∫(sin x + cos² x) / |sin x - cos x| dx
We can split this integral into two cases: when sin x - cos x > 0, and when sin x - cos x < 0.
Case 1:
sin x - cos x > 0 (when x is between -π/4 and π/4, or between 3π/4 and 5π/4)
In this case, we can drop the absolute value sign:
∫(sin x + cos² x) / (sin x - cos x) dx
= ∫(sin x / (sin x - cos x)) dx + ∫(cos² x / (sin x - cos x)) dx
= -ln|sin x - cos x| - ∫(1 + sin 2x) / (2sin x - 2cos x) dx
To integrate the second term, we can use the substitution u = sin x - cos x, so that du/dx = cos x + sin x and dx = du/(cos x + sin x):
∫(1 + sin 2x) / (2sin x - 2cos x) dx
= ∫(1 + 2u / √2) / (2u / √2) du
= -√2 ln|2sin x - 2cos x| - √2 ln|u| + √2 [tex]tan^{-1}[/tex] (u / √2) + C
= -√2 ln|2(sin x - cos x)| - √2 ln|sin x - cos x| + √2 [tex]tan^{-1}[/tex] [(sin x - cos x) / √2] + C
= -√2 ln|sin x - cos x| - √2 ln 2 + √2 [tex]tan^{-1}[/tex] [(sin x - cos x) / √2] + C
= -ln|sin x - cos x| - √2 ln|sin x - cos x| - √2 ln 2
Note that we have used the logarithmic identity ln(ab) = ln a + ln b and the substitution u = sin x - cos x.
Thus,
The value of the integration is -ln|sin x - cos x| - √2 ln|sin x - cos x| - √2 ln 2
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1. A limit imposed by the government on the quantity of a good or product that can be brought into the
country is called a
a. tariff
b. quota
c. foreign bill of exchange
I
d. value added tax
2. Which of the following would not be an effective argument for the U.S. to enact trade restrictions?
Oa
a. they shield U. S. workers from competition by cheap foreign labor
b. they may benefit the security and defense of the nation
c. they help the U.S. maintain diverse industries
Od. they make foreign products cheaper to U.S. shoppers
3. What does it mean if a country is on the gold standard?
O
a. it sets the value of its currency in relation to a specific amount of gold
b. it creates specific standards by which gold is made into jewelry
c. it uses gold instead of paper currency
d. none of these
LICAL
jorgo lovel of income is less
Triangle ABC is translated to image A′B′C′. In this translation, A(5, 1) maps to A′(6, –2). The coordinates of B′ are
(–1, 0). What are the coordinates of B?
Answer:
We know that point A(5, 1) maps to A'(6, -2) in the translation. To find the translation vector, we can subtract the coordinates of A from the coordinates of A':
Translation vector = A' - A = (6, -2) - (5, 1) = (1, -3)
This means that every point in the preimage moves 1 unit to the right and 3 units down to reach its corresponding point in the image.
We also know that point B'(−1, 0) is the image of a point B in the preimage. To find the coordinates of point B, we can apply the translation vector to B':
B = B' - Translation vector = (-1, 0) - (1, -3) = (-2, 3)
Therefore, the coordinates of point B in the preimage are (-2, 3).
On a given day, a greengrocer sold 81 oranges and 43 melons. Write the ratio of oranges to melons in the form 1: n. Give any decimals in your answer to 2 d.p.
Answer:
1 : 0.53Step-by-step explanation:
On a given day, a greengrocer sold 81 oranges and 43 melons. Write the ratio of oranges to melons in the form 1: n. Give any decimals in your answer to 2 d.p.
orange = 81
melons = 43
ratio 81 : 43
divide both side by 81
1 : 0.53
x and y are both differentiable functions of t x^2 + 3xy − y^2=9
Find dy/dt when x = 2 given dx/dt
= −1
The value of dy/dt is 4/3.
We have,
x² + 3xy - y² = 9
Now differentiating above equation w r t to 't' we get
d/dt x² + d/dt (3xy) - d/dt (-y²) = 0
d/dx (x²) . dx/dt + 3 dx/dt. dy/dt - 2y dy dt = 0
2x (-1) + 3(-1) dy/dt - 2y dy/dt = 0
dy/dt(-3 -2y)= -4
dy/dt = -4/(-3)
dy/dt = 4/3
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What degree of rotation about the origin will cause the triangle below to map
onto itself?
B
-8 -6
C
8
6
MO
2
-2-
T
-6-
-8
6 8
Answer: 6 feet and 2 yards are the same distance because each yard is 3 feet
Step-by-step explanation:
What is the component form of resultant of 4b - 2a?
ā= (6,-2)
b=(-5,2)
Enter your answer by filling in the boxes.
4b- 2a =(_,_)
Answer:
To find the resultant of 4b - 2a, we need to first calculate 4b and -2a separately, and then add them together.
4b = 4(-5, 2) = (-20, 8)
-2a = -2(6, -2) = (-12, 4)
Now, we can add (-20, 8) and (-12, 4) component-wise to find the component form of the resultant:
4b - 2a = (-20, 8) + (-12, 4) = (-20 - 12, 8 + 4) = (-32, 12)
Therefore, the component form of the resultant of 4b - 2a is (-32, 12).
Answer: (-32, 12)
Step-by-step explanation: I took the test.
Given:
a = (6, -2)
b = (-5, 2)
4b = 4( -5, 2) = ( -20, 8)
-2a = -2( 6, -2) = ( -12, 4)
(-20, 8)
( -12, 4)
+______
(-32, 12)
liz and fareed each start a new savings account. Liz starts her account with $75. Fareed starts with $100. They both save $50.
What are there amounts after 4 weeks?
Therefore, after 4 weeks, Liz will have $275 in her savings account and Fareed will have $300 in his savings account.
After 1 week
Liz will have saved $75 + $50 = $125, and
Fareed will have saved $100 + $50 = $150.
After 2 weeks,
Liz will have saved a total of $125 + $50 = $175, and
Fareed will have saved a total of $150 + $50 = $200.
After 3 weeks,
Liz will have saved a total of $175 + $50 = $225, and
Fareed will have saved a total of $200 + $50 = $250.
After 4 weeks,
Liz will have saved a total of $225 + $50 = $275, and
Fareed will have saved a total of $250 + $50 = $300.
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Which shape depicts the cross-section?
O A.
OB.
O C.
D.
The shape generated by the cross-section is a rectangle. So the correct option is D.
Which shape depicts the cross-section?Notice that the cross-section goes through two opposite sides of the cube.
Then the shape that we will get will also be a quadrilateral of parallel sides. Notice that if the plane was parallel to the square, the cross-section would be also a cube, but because it is slanted, one of the sides will be larger, then we will get a rectangle, thus, the correct option is the last one.
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can someone help with those 2 questions please? I’ll reward you with brainsliet.
The polynomial (2m + 2n)6 = 12m + 12n.
For the long division, the quotient is x - 2, the remainder is 6, and the dividend can be written as (x - 2)(x² - 4x + 3) + 6.
How to divide polynomials?To expand the expression (2m + 2n)6, using the distributive property of multiplication over addition:
(2m + 2n)6 = 2m(6) + 2n(6)
Simplifying further, evaluate the products:
= 12m + 12n
Therefore, (2m + 2n)6 = 12m + 12n.
Using long division to divide the polynomial x³ - 6x² + 11x - 6 by the polynomial x² - 4x + 3. The steps are as follows:
x - 2
------------------
x² - 4x + 3 | x³ - 6x² + 11x - 6
- (x³ - 4x² + 3x)
- 2x² + 8x
- 2x² + 8x - 6
+ 6
Therefore, x³ - 6x² + 11x - 6 = (x - 2)(x² - 4x + 3) + 6.
So the quotient is x - 2, the remainder is 6, and the dividend can be written as (x - 2)(x² - 4x + 3) + 6.
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Match each word below with an image to help remember its meaning:
enigma
urban
industry
P
ants and anthill
row of tall buildings
question mark
2. The showroom for a new apartment complex includes a scale model of the building.
The scale factor is 1/3.41 If the actual apartment building will be 39 m wide, how wide is the model?
a. 13.7 m
b. 9.1 m
c. 133 m
d. 11.4 m
The calculatd value of the model width is 11.4 m
How wide is the model?From the question, we have the following parameters that can be used in our computation:
Scale factor = 1/3
Actual apartment building will be 39 m wide
Using the above as a guide, we have the following:
Model width = Scale factor *Actual apartment building
Substitute the known values in the above equation, so, we have the following representation
Model width = 1/3.4 * 39
Evaluate
Model width = 11.4
Hence, the model width is 11.4 m
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(-35z^4x+32z^4 x^6) divided by (-4z^3 x^5)
(-35z⁴x + 32z⁴x⁶) divided by -4z³x⁵ gives {(35z - 32zx⁵)/ (4x⁴)} by applying simple rule of division of polynomials.
Let the given polynomial be written as,
f(z,x) = -35z⁴x + 32z⁴x⁶
g(z,x) = -4z³x⁵
Here the functions of the given polynomial are composed of two variables, namely x and z, so the functions are denotes likewise.
We can divide the polynomial f(x) by g(x) by the division method as,
[tex]\frac{f(z,x)}{g(z,x)}[/tex] = (-35z⁴x + 32z⁴x⁶) / ( -4z³x⁵)
= { (-35z⁴x)/ ( -4z³x⁵) } + {(32z⁴x⁶)/ ( -4z³x⁵)}
= [tex]\frac{35z}{4x^4}[/tex] + [tex]\frac{-8zx}{1}[/tex]
= [tex]\frac{35z - 32zx^5}{4x^4}[/tex]
or, = {(35z - 32zx⁵)/ (4x⁴)}
Thus the required value of (-35z⁴x + 32z⁴x⁶) divided by -4z³x⁵ is {(35z - 32zx⁵)/ (4x⁴)}
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ction 10.1 HW
O Points: 0 of 1
The null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. What parameter is being tested?
H₂o = 9
H₁ o<9
What type of test is being conducted in this problem?
Right-tailed test
Two-tailed test
O Left-tailed test
w an example
Get more help -
Part 1 of 2
Clear all
Final ch
The hypothesis test is left-tailed, and we are testing the population standard deviation.
If a hypothesis test has an equal hypothesis versus a not equal hypothesis, then it is a two-tailed test.
If it has an equal hypothesis versus a less than hypothesis, then it is a left-tailed test.
Finally, if it has an equal hypothesis versus a greater than hypothesis, then it is a right-tailed test.
This is an equal hypothesis versus a 'less than', so this is left-tailed.
Recall that is the population mean, a is the population standard deviation, and p is a population proportion.
Since the hypotheses refer to σ we are testing the population standard deviation.
Hence, the hypothesis test is left-tailed, and we are testing the population standard deviation.
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What is the perimeter of square HIJK?
104
-10 -8
-6
-4
K
-2
8
units
6
4
2
0
-2
-4
-6
-8
A
H
lot
6
8
-10
Write your answer as an integer or as a decimal rounded to the nearest tenth.
Perimeter =>
well, we know is a square, so that means all sides are equal, so if we just find one side and multiply it by 4, that's our perimeter, hmmmm let's use the points of K(-2 , 0) and J(3 , 5)
[tex]~~~~~~~~~~~~\textit{distance between 2 points} \\\\ K(\stackrel{x_1}{-2}~,~\stackrel{y_1}{0})\qquad J(\stackrel{x_2}{3}~,~\stackrel{y_2}{5})\qquad \qquad d = \sqrt{( x_2- x_1)^2 + ( y_2- y_1)^2} \\\\\\ KJ=\sqrt{(~~3 - (-2)~~)^2 + (~~5 - 0~~)^2} \implies KJ=\sqrt{(3 +2)^2 + (5 -0)^2} \\\\\\ KJ=\sqrt{( 5 )^2 + ( 5 )^2} \implies KJ=\sqrt{ 25 + 25 } \implies KJ=\sqrt{ 50 } \\\\[-0.35em] ~\dotfill\\\\ \stackrel{ \textit{\LARGE perimeter} }{4\sqrt{50} ~~ \approx ~~ }\text{\LARGE 28.3}[/tex]
A magician performs in a hall that has a seating capacity of 1,000 spectators. With ticket prices set at $47, average attendance has been 640 spectators. A marketing survey shows that for each dollar the ticket price is lowered, the average attendance increases by 20. Find the price that maximizes revenue from ticket sales.
The price that maximizes revenue from ticket sales is $ 11, 445.
We have,
Ticket price = $47
Let x the decreasing number of the ticket price.
So, The revenue is
R = ticket price x numbers of spectator
R(x) = ( 47 - x ) ( 640 + 20x)
= 30,800 + 940x - 640x -20x²
= -20x² + 300x + 30,800
Now, Taking derivatives on both sides
R'(x) = -40x + 300
and, R'(x) = 0
-40x = -300
x = 7.5
So, the price per ticket is
= 47- 7.5
= $ 39.5
and, R(max) = -20(39.5)² + 300(39.5) + 30,800
R(max) = -31205 + 42650
R(max) = $ 11, 445
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Answer:
$39.50
Step-by-step explanation:
prove that 1^3+2^3+3^3+...+n^3=(1+2+3+...+n)^2 by mathematical induction
Find the volume of the shape below. Round to the nearest tenth. Use
the pi button on the calculator.
11 mi
5 mi
Volume =
mi3
Answer:
V = π(5^2)(11) = 275π cubic miles
= 863.9 cubic miles
Which statement is true about the end behavior of the function repnesented by the graph
The statement which is true about the end behaviour of the given quadratic function is;
As x approaches -∞, f(x) approaches ∞, and as x approaches ∞, f (x) approaches ∞.Which answer choice correctly describes the end behaviour of the graph?As evident from the task content; the answer choice which correctly describes the end behaviour of the given quadratic function is to be determined.
By observation, the given quadratic graph opens upwards and on this note, its end behaviour is such that; As x approaches -∞, f(x) approaches ∞, and as x approaches ∞, f (x) approaches ∞.
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It asks me to write a fraction as a mixed number. If I have 20/10, what is the mixed number?
If your base pay is 10000 your commission rate is 40% you sell 15 cars and you earn 40000 how much does each car cost
Answer: $4,000
Step-by-step explanation:
If the total earnings were $40,000 and the base pay was $10,000, then the commission earned would be $40,000 - $10,000 = $30,000.
Since the commission rate is 40%, we can set up the equation:
40% x Total Sales = Commission Earned
We know that the commission earned is $30,000, and we also know that 15 cars were sold. Therefore, we can solve for the average price of each car:
40% x Total Sales = Commission Earned
40% x (15 x Price per Car) = $30,000
6 x Price per Car = $30,000
Price per Car = $5,000
However, this is just the average price per car. Since the commission is based on the total sales, we need to calculate the actual commission earned on each car:
Commission per Car = 40% x Price per Car
Commission per Car = 40% x $5,000
Commission per Car = $2,000
Therefore, the total earnings of $40,000 divided by the number of cars sold (15) gives the amount earned per car:
Amount earned per Car = Total Earnings / Number of Cars Sold
Amount earned per Car = $40,000 / 15
Amount earned per Car = $4,000
One quarter of a bread recipe calls for 2/3 cup of bread flour how much flour is needed per recipe
The number of cups of flour required to make 1 recipe is 8/3.
Given that, one quarter of a bread recipe calls for 2/3 cup of bread flour.
Amount of flour required per 1 recipe = Number of quarters × Number of cups of flour
= 4 × 2/3
= 8/3
Therefore, the number of cups of flour required to make 1 recipe is 8/3.
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A diameter of a circle has endpoints A(-4,2) and B(3,2). Find the center of the circle, radius, and write an equation for the circle. * 0 points
A car is purchased for $32,000. Each year it loses 25% of its value. After how many years will the car be worth $5800 or less
Answer: 6 years
Step-by-step explanation: 32,000 divided by 25% is 24,000. 24,000 divided by 25% is 18,000. 18,000 divided by 25% is 13,500. 13,500 divided by 25% is 10,125. 10,125 divided by 25% is 7,593.75. 7,593.75 divided by 25% is 5,695.3125. so 6
I need some assistance with this ?
The missing side using the Pythagorean theorem is 10.2.
We have,
We see that,
Hypotenuse = 13
Base = x (say)
Height = 8
Now,
Applying the Pythagorean theorem,
Hypotenuse² = Base² + Height²
Substituting,
13² = x² + 8²
13² = 169
8² = 64
So,
169 = x² + 64
x² = 169 - 64
x² = 105
x = √105
x = 10.24
x = 10.2
Thus,
The missing side is 10.2.
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