Help for trigonometry class please

Answers

Answer 1

The most appropriate choice for matrix and multiplicative inverse of matrix will be given by

B is the multiplicative inverse of A

What is a matrix and multiplicative inverse of matrix?

Matrix is a rectangular representation of numbers or symbols arranged in the form of rows and column. Matrix is a very important tool in mathematics.

To learn about multiplicative inverse, it is important to know about identity matrix

[tex]\begin{bmatrix} 1 & 0 \\ 0 & 1\end{bmatrix}[/tex] is a 2 x 2 identity matrix denoted by I.

Let A and B be two matrices

A is said to be a multiplicative inverse of B if AB = BA = I

Here,

A= [tex]\begin{bmatrix} 2& 1\\1 & 1\end{bmatrix}[/tex] B = [tex]\begin{bmatrix} 1& -1\\-1 & 2\end{bmatrix}[/tex]

AB =

[tex]\begin{bmatrix} 2& 1\\1 & 1\end{bmatrix}\begin{bmatrix} 1& -1\\-1 & 2\end{bmatrix}[/tex]

[tex]\begin{bmatrix} 2\times 1 + 1 \times -1& 2 \times -1 + 1\times 2\\1 \times 1+1\times-1 & 1 \times -1 + 1 \times 2\end{bmatrix}\\\begin{bmatrix} 1& 0\\0&1\end{bmatrix}\\[/tex]

BA =

[tex]\begin{bmatrix} 1& -1\\-1 & 2\end{bmatrix}\begin{bmatrix} 2& 1\\1 & 1\end{bmatrix}[/tex]

[tex]\begin{bmatrix} 1\times 2 + -1 \times 1& 1 \times 1 + -1\times 1\\-1 \times 2+2\times 1 & -1 \times 1+ 2 \times 1\end{bmatrix}\\\begin{bmatrix} 1& 0\\0&1\end{bmatrix}\\[/tex]

AB = BA = [tex]\begin{bmatrix} 1& 0\\0&1\end{bmatrix}\\[/tex]

So B is the multiplicative inverse of A

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Related Questions

Kara currently makes $12 per hour. If she receives a
50% raise, what is her new rate?
What would a 75% raise be equal to????
K
TO
160
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Answers

A.50%* $12= $6
$12+$6= $18

B.75%* $12= $9
$12+ $9=$21

Find the future value, using the future formula and a calculator. (Round your answer to the nearest cent.)$901 at 3.5% compounded semiannually for 6 years

Answers

To calculate the future value we need to use the compound formula:

[tex]A=P(1+\frac{r}{n})^{nt}[/tex]

where P is the principal, r is the interest rate in decimal form, n is the number of times the interest is compound in any given time t.

In this case we have that P=901, r=0.035 and since the interest is compound semiannually this means that n=2. Finally t=6. Plugging this values into the equation above we have that:

[tex]\begin{gathered} A=901(1+\frac{0.035}{2})^{2\cdot6} \\ A=1109.53 \end{gathered}[/tex]

Therefore the future value would be $1109.53

slope -4; passes through (2, 3)

Answers

Answer: y = -4x + 11

Step-by-step explanation:

y = mx + b

3 = -4(2) + b

3 = -8 + b

11 = b

Riley and Paul go to the driving range. Together, they hit 75 balls. Riley hit 17 more than Paul. How many
balls did each of them hit?

Answers

Riley hit 46 balls and Paul hit 29 balls at the driving range.

According to the question, let

Number of balls hit by Riley be x

Number of balls hit by Paul be y

Together Riley and Paul hit 75 balls

∴x+y=75 (1)

Riley hit 17 more balls than Paul

∴x= y + 17 (2)

Now we have to solve these simultaneous linear equations (1) and (2)

Replacing the value of x from equation (2) into equation (1) we get,

y+17+y=75

⇒2y + 17 = 75

⇒2y = 75 - 17

⇒2y = 58

⇒y = 58/2 (dividing both sides by 2)

⇒y = 29

∴No. of balls hit by Riley = x = y +17 = 29 + 17 = 46 (from equation (2))

Therefore, Riley hit 46 balls and Paul hit 29 balls at the driving range.

Another problem to solve simultaneous linear equation using algebra

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how long does it take ella to run 7.5 kilometers

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is there more to the question?

please help ill give uu crown to the first person who is right

Answers

Answer:

Step-by-step explanation:

Using a graph typing in 9x and looking at the table, (2,1) is not on the table, so (2,1) is not a solution to 9x

Answer:

Step-by-step explanation:

to determine if (2, 1 ) is a solution, substitute the x- coordinate into the equation and if the result is equal to the y- coordinate then it is a solution.

y = 9x ( substitute x = 2 )

y = 9 × 2 = 18 ≠ 1

then (2, 1 ) is not a solution to the equation.

i have been working to become a major in math and i need some help with what this second word might be for this problem from last weeks exam

Answers

I believe it is altitude

Convert to a percent: 0.341 A. 0.341% B. 341% C. 3,410% D. 34.1%

Answers

Answer:

34.1%, D

Step-by-step explanation:

To convert a number into a percent, you multiply it by 1, or more precisely, 100%. 100% can be thought of as 100 * 1%
0.341 * 100 * 1 % = 34.1%

Answer:

Step-by-step explanat

Rotate the shape as described.

The ordered pair for A' is
. The ordered pair for B' is
. The ordered pair for C' is
. The ordered paid for D' is

Answers

By applying a rotation of 90° clockwise to square ABCD, we have the following:

The ordered pair for A' is (5, -3).The ordered pair for B' is (-2, 7).The ordered pair for C' is (8, 8).The ordered pair for D' is (10, 4).

What is a rotation?

A rotation is a type of transformation which moves every point of the object through a number of degrees around a given point, which can either be clockwise or counterclockwise direction.

In Mathematics, rotating a point 90° about the origin in a clockwise or counterclockwise direction would produce a point that has the coordinates (y, -x).

By applying a rotation of 90° clockwise to square ABCD, the coordinate of the image of square A'B'C'D' is given by:

(x, y) → (y, -x)

Points at A = (-3, 5) → Points at A' = (5, -(3)) = (5, -3)

Points at B = (-7, -2) → Points at B' = ((-2), -(-7)) = (-2, 7).

Points at C = (-8, 8) → Points at C' = (8, -(-8)) = (8, 8).

Points at D = (-4, 10) → Points at D' = (10, -(-4)) = (10, 4).

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Find the Properties to graph this Rational Expression. DO NOT GRAPH. If an answer is "none" type in "none" for the answer blank. Make sure to type in your Asymptotes correctly(x=y=)F(x)=-4x+8/x^2-x-2Need to answer:Hole:(___,___)Vertical asymptote:______X-intercept:(___,___)Y-intercept:(___,___)Horizontal asymptote:____

Answers

Given data:

The given expression is f(x)= (-4x+8)/(x^2 -x-2).

The hole of the graph is x=2.

The expression for the vertical asymptode is,

[tex]x=-1[/tex]

The expression for the horizontal asymptode is,

[tex]y=0[/tex]

There is no x-intercept, and y-intercept is,

[tex](0,\text{ -4)}[/tex]

Thus, the

a function is said to have a horizontal asymptote if either the limit at infinity exists or the limit at negative infinity exists. show that each of the following functions has a horizontal asymptote by calculating the given limit.

Answers

A function can only have two horizontal asymptotes, hence the answer is no. By examining the degrees of the numerator and denominator, one can find the horizontal asymptote of a rational function.

If limxf(x)=L or limxf(x)=L, a function f(x) will have the horizontal asymptote y=L. Therefore, we simply calculate the function's limit as it approaches infinity and again as it approaches negative infinity to locate horizontal asymptotes. Based on the degree of the numerator, n, and the degree of the denominator, m, horizontal asymptotes adhere to three principles. The horizontal asymptote is y = 0 if n m. The horizontal asymptote is y = a/b if n = m. There is no horizontal asymptote if n > m. As x gets closer to 0, we say that f(xlimit )'s is infinite. A boundary or a limit is now a number.

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PLEASE HELP DUE IN 4 MINUTES, THANK YOU!!

Answers

Answer:

A 100% increase in a total means the final amount is 200% of the initial amount.

A 100% decrease in a total means the final amount is 0% of the initial amount.

Error means that you were a way off from the real value

Step-by-step explanation:

A spherical balloon is inflated so that its volume is increasing at the rate of 12 cubicfeet per minute. How fast is the radius of the balloon increasing when the radius is 6feet?

Answers

Given:

The rate of change in volume = 12 cubic feet per minute.

We need to find the rate of change of radius at radius = 6 feet.

Consider the formula to find the volume of the sphere.

[tex]V=\frac{4}{3}\pi r^3[/tex]

Differentiate with respect to t.

[tex]\frac{dV}{dt}=\frac{4}{3}\pi\times3r^2\times\frac{dr}{dt}[/tex][tex]\text{ Substitute }\frac{dV}{dt}=12\text{ and r=6 in the formula.}[/tex]

[tex]12=\frac{4}{3}\pi\times3(6)^2\times\frac{dr}{dt}[/tex]

[tex]12=144\pi\times\frac{dr}{dt}[/tex]

Dividing both sides by 144pi, we get

[tex]\frac{12}{144\pi}=\frac{dr}{dt}[/tex]

[tex]\frac{dr}{dt}=\frac{1}{12\pi}[/tex]

[tex]\frac{dr}{dt}=\frac{1}{37.68}=0.0265\text{ feet per minute}[/tex]

Hence the radius of the balloon increases by 0.03 feet per minute.

Assume that each circle shown below represents one unit. Express the shaded
amount as a single fraction and as a mixed number.

Answers

Shaded portion in single fraction is [tex]\frac{37}{10}[/tex] and mixed number is 3[tex]\frac{7}{10}[/tex] .

What is difference between fraction and mixed number?

Single fraction is represented as [tex]\frac{p}{q}[/tex] form where p is numerator and q is denominator and value of q can't be zero. Example [tex]\frac{5}{9}[/tex] .

Mixed number contains two part one is an integer and other is fractional part. It is represented as N [tex]\frac{p}{q}[/tex]. Example 5[tex]\frac{1}{2}[/tex] .

According to figure, one shaded circle is equal to one unit and one shaded circle contain 10 sector.

There are three shaded circle and a circle with 7 sector shaded.

So, Total shaded area in single fraction = 1 + 1 + 1+ [tex]\frac{7}{10}[/tex] = [tex]\frac{37}{10}[/tex]

and total shaded area in mixed number = 1 + 1 + 1 + [tex]\frac{7}{10}[/tex] = 3 + [tex]\frac{7}{10}[/tex] = 3[tex]\frac{7}{10}[/tex] .

Hence, shaded portion in single fraction is [tex]\frac{37}{10}[/tex] and mixed number is 3[tex]\frac{7}{10}[/tex] .

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How can you justify that the function is
exponential?

Answers

Answer:

Since the y axis is increasing at an exponential rate. You can see that it goes from 0.06 to 0.125 to 0.25. If you were to graph that it would be a exponential curve. You can see that it jumps alot.

0.0625 to 0.0625*2 to 0.0625*2*2 to 0.0625*2*2*2

HELP ASAP NEEDS TO BE TURNED IN TONIGHT

Answers

Answer:

y= 2x + 9

Step-by-step explanation:

The answer would be Y = 2x + 9

Evaluate : (12.5)³

find the answer

Answers

Answer:

1953.125

Step-by-step explanation:

(12.5)³

= 12.5 × 12.5 × 12.5

= 1953.125

Answer: 1953.125

(12.5)³

so 12.5 multiplied to itself thrice

12.5x12.5x12.5

which is 1953.125

The cost of manufacturing a cake is directly proportional to the volume of the cake.
The baker makes a 70% profit when he sells a large rectangular cake.
The baker sells a large rectangular cake for £6.80 The baker decides to sell smaller rectangular cakes.
The length, width, and height of the smaller cakes are all half of those of the large rectangular cake.
He sells a pack of 6 of the smaller cakes for £6.50

How much profit does he make on the pack of smaller cakes?

Answers

Answer:

The baker makes £3.50 profit on smaller cakes

================================

Given

Large cake:

Price = £6.80,Profit = 70%

Small cake:

Number = 6,Price = £6.50,Dimensions = each side is 1/2 of the large cake

Solution

The profit is the difference of the cost and selling price.

Find the cost x of large cake:

x + 70% = 6.801.7x = 6.80x = 4

Find the volume of the pack of smaller cakes, taking the volume of the large cake as a unit:

6*(1/2)³ = 6*1/8 = 3/4

Cost of the pack of smaller cakes is proportional to the volume:

4*3/4 = 3

Profit made on smaller cakes:

6.50 - 3 = 3.50

y + 8 < -9 solve for y please i need help im a smart student i just need a bit of help

Answers

Answer:

the answer is y<-17

Step-by-step explanation:

This is actually just like algebra.

y+8<-9

y<-9-8

y<-17

Darlene has 6 3/4 gallons of gasoline. Every time she mows her lawn, she uses 3/8 gallon. How many times can she mow her lawn before she needs more gas?w

Answers

The number of times Darlene mow her lawn before she needs more gasoline is equal to 18times.

As given in the question,

Total gasoline with Darlene is equal to 6 3/4 gallons

Convert mixed fraction into proper fraction:

6 3/4 = 27/4 gallons

Every time amount of gasoline used to mow her lawn = 3/ 8gallon

Number of times Darlene mow her lawn before she needs more gasoline

= (27 / 4) ÷ (3 /8)

= (27 /4) × (8/3)

= 18 times

Therefore, the number of times Darlene mow her lawn before she needs more gasoline is equal to 18times.

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8+2x3²
= 8+6²
= 8+36
= 44
What are his mistakes?

Answers

He needs to follow PEMDAS

so it would be
8+2x9
8+18
26

What is the probability of
spinning a yellow?
[?]%

Answers

Answer:

12.5

Step-by-step explanation:

there are eight triangles and one yellow so 1/8=12.5%

Answer: 12.5%

Step-by-step explanation:

There are 8 sections and 1 of them is yellow so 1 divided by 8 is 0.125 or 12.5%

a textbook store sold a combined total of 392 biology and psychology textbooks in a week. the number of psychology textbooks sold was 48 less than the number of biology textbooks sold. how many textbooks of each type sold?

Answers

Number of biology book sold are 223.

Number of psychology books sold are 183.

What is equation?

In algebra, an equation is a declaration of equivalence that includes one or more variables or unknowable quantities.

Given Data

A textbook store sold a combined total of 392 biology and psychology textbooks in a week. the number of psychology textbooks sold was 48 less than the number of biology textbooks sold.

Let number of biology books sold be x

Let number of psychology books sold be (x- 48)

Total book sold = 392

392 = x + x - 48

392 + 48 = 2x

446 = 2x

x = 223

Number of biology book sold are 223.

Number of psychology books sold are 183.

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Need help solving these questions!! thank you :)

Answers

Answer:

1. 25+5c

2. -8y-16

3. (m+1)^9

4. -6a-15

5. 4y+12z

6. (2a+3b)^4

7. 23c

8. 8y+7x

9. 14a+16

10. 16m+16n

3 Violet's Videos
clients. One week after launching the website, she had posted a total of 6 videos. At the end
Violet is a yoga instructor who regularly posts new exercise videos on a website for her
of week 2, she had a total of 10 videos. At the end of week 3, she had a total of 14 videos. At
the end of week 4, she had a total of 18 videos.

Find the Term Value

Answers

The completed table is:

Term Number 1 2 3 4 5 6

Term Value 6 10 14 18 22 26

What are the term values?

In order to determine the term values, the rate of increase in the number of videos that Violet has at the end of each week has to be determined.

Rate of increase in the number of videos can be determined by dividing the change in the number of videos per week by the change in the number of weeks.

Rate of increase = change in the number of videos / change in the number of weeks

(10 - 6) / (2 - 1)

4 / 1 = 4 videos per week

Number of videos in week 5 = 18 + 4 = 22

Number of videos in week 6 = 22 + 4 = 26

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48,384 - 2,904 divided by 48,384 multiplied by 100

Answers

Correct answer is

48377.9980159

What’s the answer plss

Answers

The length of the opposite side XY = 15.2cm

How to calculate the opposite side XY?

From the right- triangle XYZ,

[tex]sin \theta =\frac{opposite}{hypotenuse}\\\\sin 61 ^\circ=\frac{XY}{XZ} \\\\XY = sin 61 ^\circ *XZ\\\\XY = 0.875* 17.4 \\\\XY = 15.2cm[/tex]

The length of the opposite side XY = 15.2cm

What is opposite side of a right-triangle?

From a particular angle, the opposite side is across. The legs of a right triangle are its adjacent and opposite sides, together, they make up the triangle. The opposing (shorter) side is the side that is shorter and perpendicular to the angle from which you are observing it.The angle from which we are looking does not include this side.An opposite side in a right triangle is the one that is across from a given angle, while an adjacent side is the one that is next to a given angle and the hypotenuse is the longest side in a right triangle.

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The steps at the right show cam's works in solving an equation. Circle the line where he makes a mistake. Then, find the correct solution to the equation.

Answers

The correct solution to the equation is -13.

-12x + 12 = -3(5x + 8)

Split the right-hand side,

-12x + 12 = -15x + 24 (This line have error, instead of + there will be - )

Shifted the values of x to the left-hand side and the constant values to the right-hand side,

3x + 12 = 24

3x = 12

x= 4, which is the incorrect value of x.

The correct solution to the equation,

-12x + 12 = -3(5x + 8)

Split the right-hand side,

-12x + 12 = -15x - 24

Shift the values of x to the left-hand side and the constant values to the right-hand side,

3x = -36

The final value of x,

x = -13

Therefore, the value of x is -13.

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#10 Eastern Mountain Sports is offering 20%
off of your entire purchase. You have an
online code that will give you an additional
10% off of the sale price(s). You decide to
buy a Kayak, a seat, and a paddle. How
much will you pay after receiving the
discount and using your online code?
EASTERN MOUNTAIN SPORTS
PELICAN Summit Kayak $299.99
BB Adjustable Paddle $191.96
YAK GEAR Kayak Seat $99.99

Answers

Answer: $426.20

Step-by-step explanation:

The subtotal is [tex]299.99+191.96+99.99=\$ 591.94[/tex].

[tex](591.94)(0.8)=\$473.552\\\\(473.552)(0.9) \approx \$426.20[/tex]

In ΔTUV, UV = 14, VT = 19, and TU = 9. Which statement about the angles of ΔTUV must be true?

Answers

In ΔTUV, UV = 14, VT = 19, and TU = 9, The statement about the angles of ΔTUV that must be true is [tex]m \angle U > m \angle T > \angle V[/tex] Option 5

This is further explained below.

What are angles?

Generally, A triangle's angle is a measurement of the length of the side that is perpendicular to it.

This indicates that if one of the sides is longer in length, then the measure of the angle opposite to it will also be longer.

The angles in the triangle TUV are denoted by the symbols T, U, and V.

The side that is UV, TV, and T U correspondingly is the side that is opposite to these angles.

The length of the opposing sides will immediately determine the measure of the angles, which will be directly proportionate to those angles.

since V T>U V>T U, the arrangement of angles will correspond to this as follows: [tex]m \angle U > m \angle T > \angle V[/tex] Option 5