**Answer:**

look at the picture i sent

Suppose that A, B, C, D, and E are matrices with the following sizes:

A B C D E

(4x 1) (4 x 1) (1 x 2) (2 x 1) (1 x 4)

Determine whether the matrix expression E (3B + A) is defined. Matrix is defined Enter the size of the resulting matrix (enter 'NA in each box if undefined).

E (3B + A) is a 3 X 3.

**Answer:**

The expression E (3B + A) is defined. The size of the resulting matrix is (1 x 1).

**Step-by-step explanation:**

Let's consider the following **operations between matrices**.

E (3B + A)

B is a matrix of (4 x 1), that is, it has 4 rows and 1 column. Let F = 3B. This is **the product of a scalar by a matrix**, which results in a matrix of the same size as the original. Then, F is a matrix of (4 x 1).

Now, let's consider **the sum** F + A, which we well call G. We can sum F and A because they are of the same size and we will get G, a matrix of the same size, (4 x 1).

Finally, we have **the product** E . G. We can multiply 2 matrices of sizes (m x k) and (k x n), that is, the number of columns of the first matrix must be equal to the number of rows of the second matrix, and the resulting matrix has a size (m x n). This is the case because E is (1 x 4) and G is (4 x 1), and the resulting matrix will be (1 x 1).

Which sentence is punctuated correctly?

A) For breakfast we had bacon, and eggs, fruit juice, and cereal.

B) The novelist wrote poetry, short , stories and plays about her childhood in North Dakota .

C) The bank has branches in downtown Portland Beaverton Milwaukie , and Vancouver .

D) The athlete won the triathlon by running, a marathon , swimming two miles, and bicycling around the island.

**Answer:**

A) For breakfast we had bacon, and eggs, fruit juice, and cereal.

Hope this helps!!

4/5 divided by 4/7 in simples form

**Answer:**

1 2/5

**Step-by-step explanation:**

4/5 divided by 4/7

(4/5) x (7/4) = 28/20=7/5 or 1 2/5

I need the answer. Pls∝∝∝∝

**Answer: it is going to be (B)**

**Answer:**

C.256

**Step-by-step explanation:**

2(lb+bh+hl) = SA

length = 12

width = 4

Height = 5

2( 48+60+20)

128 x 2 = 256

I am the distance around the circle- it's perimeter WHAT AM I?

I believe the answer is the circumference

please answer this question

itss 11

**Step-by-step explanation:**

no worries about it is the same time for me

2×x×3×y

[tex]2 \times x \times 3 \times y[/tex]

**Answer:**

6xy

**Step-by-step explanation:**

help please and thank you

**Answer:**

B

**Step-by-step explanation:**

its 60°

thank me later

**Answer:**

B

**Step-by-step explanation:**

Triangles have angle totals adding to 180. You already have 120 so the other must be 60.

1. If AB = 4x+5 and CD = 5x-6, find CD.

**Answer:**

49

**Step-by-step explanation:**

Work is shown in the image

For which of the following compound inequalities is there no solution?

**Answer:**

(a)[tex]6m \le - 36[/tex] and [tex]m + 24 > 20[/tex]

**Step-by-step explanation:**

**Required**

Which of a to d has no solution

(a)[tex]6m \le - 36[/tex] and [tex]m + 24 > 20[/tex]

We have: [tex]m + 24 > 20[/tex]

Sole for m

[tex]m >20 - 24[/tex]

[tex]m >-4[/tex]

[tex]6m \le - 36[/tex]

Divide by 6

[tex]m \le -6[/tex]

So, we have:

[tex]m \le -6[/tex] and [tex]m >-4[/tex]

[tex]m \le -6[/tex] implies that: m = -6,-7,-8,-9.....

[tex]m >-4[/tex] implies that m = -3,-2,-1,0.....

**Hence, there is no solution**

The sections on a spinner are numbered from 1 through 8. If the probability of landing on a given section is the same for all the sections, what is the probability of spinning a number less than 3 or greater than 5 in a single spin?

**Answer:**

5/8

**Step-by-step explanation:**

There are two numbers from one to eight that are less than three (1 and 2). So 2/8 of the numbered sections are less than three.

There are three numbers from one to eight that are greater than five (6, 7, and 8). So 3/8 of the numbered sections are greater than five

Probability of getting a number less than three: 2/8

Probability of getting a number greater than five: 3/8

Probability of getting either in a single spin = 2/8 + 3/8 = 5/8

Right Triangles

Solve the right triangle shown in the figure

BC = 2.7cm, AC = 1.1cm, ∠C = 90°

a. ∠A = 68°, ∠B = 22°. AB = 2.9cm

b. ∠A = 22°, ∠B = 68°, AB = 2.9cm

c. ∠A = 63°, ∠B = 27°, AB = 2.9cm

d. ∠A = 24°, ∠B = 66°, AB 3.8cm

Please select the best answer from choices provided

**Answer:**

A. ∠A = 68°, ∠B = 22°, AB = 2.9cm

**Step-by-step explanation:**

I calculated it logically

Please help and show how you got the answer

**Answer:**

.11/4 multiply by any number inside the brackets 12x and also 12 to remove the brackets.

2.collect the like terms 3x+8x=11x

3. Then final answer is 11x+3.

**Answer:**

11x + 3 is the simplest form

**Step-by-step explanation:**

1/4 (12x + 12) + 8x

First distribute the 1/4 to both terms in the parentheses

= 3x + 3 + 8x

then combine like terms

= 11x + 3

We can't solve for x, only simplify this equation.

Please help I really need this done

**Answer:**

your total is..

**Step-by-step explanation:**

$14.3 you just gotta add em all together!

**Answer:**

$69

**Step-by-step explanation:**

total cost of slices of pizza = 24 x 1.75 = $42

Total cost of carrots = 12 x 0.80 = $9.6

total cost of cookies = 12 x 1.45 = $17.4

total cost = 42 + 9.6 + 17.4 = $69

help with the Measure of a triangle’s side

Answer:

x = 163.5

x = 1.2

Step-by-step explanation:

Recall: SOH CAH TOA

For the first triangle:

Reference angle = 73°

Opposite = x

Adjacent = 50

Apply TOA:

Tan 73° = Opp/Adj

Tan 73° = x/50

50*Tan 73° = x

163.542631 = x

x = 163.5 (nearest tenth)

For the first triangle:

Reference angle = 4°

Opposite = x

Adjacent = 17

Apply TOA:

Tan 4° = Opp/Adj

Tan 4° = x/17

17*Tan 4° = x

1.1887558 = x

x = 1.2 (nearest tenth)

The value of a car is decreasing by 12% per year. If the car is worth $11,000 today, what will it be worth in two years?

**Answer:**

$8518.40

**Step-by-step explanation:**

FV = PV(1+r)^n

FV = future value

PV = present value

r = rate

n = # of years

Value in 2 yrs = 11,000 x (1 - 0.12)^2 = 8518.4

Solve the inequality

x/2 > 1.52

**Answer:**

x> 3.04

**Step-by-step explanation:**

See The Image below:)

What is the mode for the following set of data?

2, 5, 7, 8, 11, 11, 12

8

10

11

no mode

the mode for the following set of data is 11

**Answer:**

11 is the answer

**Step-by-step explanation:**

What is the value of n so the

expression 3(6+x) is equivalent

to 3(x+n)?

The answer is 6

3(6+x) is the same as 3(x+6)

3(6+x) is the same as 3(x+6)

is not the same because you can not add number to alphabet but you can multiple number to alphabet..

Solve 5(2x + 3) = 20

**Answer:**

Therfore, the value of x is 1/2.

**Step-by-step explanation:**

5(2x + 3) = 20

10x + 15 = 20

10x = 20-15

10x = 5

x = 5/10

x = 1/2

**Answer:**

0.5

**Step-by-step explanation:**

5(2x + 3) =20

10x + 15 = 20

10x = 20-15

10x =5

x= 1/2

Find the x and y intercept of the equation -2x+4y=12

**Answer:**

x and y intercept

x —> (–6,0)

y —> (0, 3)

2x+ 4y=20 find the slope for y and x

**Answer:**

y= 5 x=10

**Step-by-step explanation:**

substitute by 0

What is the value of the expression below when x =6 and y =2? Xy-y^3

answer:

4

step-by-step explanation:

x = 6

y = 2

xy - y^3

substituting

6(2) - 2^3

12 - 8

4

4

step-by-step explanation:

x = 6

y = 2

xy - y^3

substituting

6(2) - 2^3

12 - 8

4

Can anybody give me the answers to these questions

Answer:

830 cents

5n + p

Step-by-step explanation:

Given that :

Number of nickels = 140

Number of pennies = 130

Total coins :

140 nickels + 130 pennies

1 nickel = 5 cent

1 penny = 1 cent

Hence,

140(5) + 130(1)

700 + 130

= 830 cents in total

If :

number of nickels = n

Number of pennies = p

Tot coins :

5n + 1p

5n + p

what is the coefficient of x in the algebraic expression (5a)x-17x^2+14a?

Coefficient of 'x'= 5a

Coefficient of 'x square'= -17

Constant term = 14a

A regression analysis was performed to determine the relationship between the costs of a product (y), the time to make the product (x1 ), the number of different materials used (x2), and the amount spent on marketing the product (x3). The estimated regression equation is ŷ = 83- 2x1+ 6x2 + 1.1x3.

What is the estimated cost if the time to make the product is 5 hours, the number of different materials used is 4, and the amount spent on marketing is $100?

a. 83

b. 213

c. 185.4

d. 205.

**Answer:**

D) 205

**Step-by-step explanation:**

Given : Cost = 83 - 2 (time taken) + 6 (materials) + 1.1 (marketing cost)

Relationship Equation : y = 83- 2x1+ 6x2 + 1.1x3

Given, time (x1) = 5 , materials (x2) = 4 , marketing cost (x3) = 100

So, putting values, Cost : y = 83 - 2 (5) + 6 (4) + 1.1 (100)

= 83 - 10 + 24 + 110 = 207

The closest to this calculated estimated figure ie 207, is 205.

Order from greatest to least: 12, -4,8, -3, 0.

**Answer:**

-4,-3,0,8,12 its backwards my bad

**Step-by-step explanation:**

because it is

**Answer:**

12, 8, 0, -3, -4

hope it helps

Simplify this 12^-6/12^7

**Answer:**

[tex]\frac{1}{12^{13}}[/tex] or [tex]12^{-13}[/tex]

**Step-by-step explanation:**

[tex]\frac{12^{-6} }{12^7} = \frac{\frac{1}{12^6} }{12^7} = \frac{1}{12^{13}} =12^{-13}[/tex]

A rectangle has an area of 72 in². The length and the width of the rectangle are changed by a scale factor of 3.5.

What is the area of the new rectangle?

Enter your answer in the box.

in2

**Answer:**

882 in^2

**Step-by-step explanation:**

Melanie volunteers on the weekend at the Central Library. As a school project, she decides to record how many people visit the library, and where they go. On Saturday, 467 people went to The Youth Wing, 433 people went to Social Issues, and 342 went to Fiction and Literature.On Sunday, the library had 1500 total visitors. Based on what Melanie had recorded on Saturday, about how many people should be expected to go to Fiction and Literature? Round your answer to the nearest whole number.

**Answer:**

413 people should be expected to go to Fiction and Literature

**Step-by-step explanation:**

**Proportion of people who went to Fictions and Literature on Saturday:**

342 out of 467 + 433 + 343 = 1243

The proportion is:

342/1243 = 0.275

**On Sunday:**

Based on Saturday, so 0.275 out of 1500(number of visitors on Sunday).

0.275*1500 = 412.5

Rounding to the nearest whole number:

413 people should be expected to go to Fiction and Literature

The claim that 20% of Americans know their credit score is tested. Suppose that the sample evidence causes us to fail to reject the null hypothesis claim that 20% of Americans know their credit score. State the final conclusion in simple, nontechnical terms. A. There is sufficient evidence to support the claim that the percentage of Americans who know their credit score is equal to 20%. B. There is not sufficient evidence to reject the claim that the percentage of Americans who know their credit score is equal to 20%. C. There is not sufficient evidence to support the claim that the percentage of Americans who know their credit score is not equal to 20%. D. There is not sufficient evidence to support the claim.
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