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mixer [17]
3 years ago
12

Let the polynomials A = 7x² + 3xy and B = -3xy .

Mathematics
1 answer:
bija089 [108]3 years ago
7 0

Answer:

– 21x^3 y – 9x^2 y^2 e) is your answer

Step-by-step explanation:

Solve the following system for A and B:

{A = 7 x^2 + 3 x y

B = -3 x y

Express the system in matrix form:

(1 | 0

0 | 1)(A

B) = (7 x^2 + 3 x y

-3 x y)

Write the system in augmented matrix form and use Gaussian elimination:

(1 | 0 | 7 x^2 + 3 x y

0 | 1 | -3 x y)

Collect results:

Answer: {A = 7 x^2 + 3 x y  , B = -3 x y

then we multiply the results (7 x^2 + 3 x y) ( -3 x y) =  – 21x^3 y – 9x^2 y^2

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2(4.r + 3) = 7x+5<br><br> (SHOW WORK)
KatRina [158]

Answer:   r=7x-1/8

Step-by-step explanation:

2(4r+3)=7x/2+5/2

4r+3=7x+5/2

4r+3-3=7x+5/2   -3

4r=7x+5/2   -3

4r/4=  7x-5/2/4  -3/4

r=7x-1/8

6 0
3 years ago
What is the Domain of the function indicated by the points on the plane?
kondor19780726 [428]
<h2>Answer:</h2>

A.) {-6, -2, 5}

<h2>Step-by-step explanation:</h2>

A function f from a set A to a set B is a relation that assigns to each element x in the set A exactly one element y in the set B. The set A is the domain (also called the set of inputs) of the function. From the figure, we can see that this set is the x-coordinate of each red point. So this set is {-6, -2, 5}

4 0
3 years ago
Please help me with my work THANK YOU A LOT
inessss [21]

Answer:

A.)

Step-by-step explanation:

The answer that you had chosen is correct, because the number line is stating that you are subtracting 5 from 0, giving you -5. Then it is saying that you are subtracting 2 from that, giving you -7.

B.) is wrong, because they are adding the answer of the correct equation with another number, which would equal -12.

C.) is incorrect, because when you are adding a positive with a negative, you are actually subtracting, not adding. When you are doing this, always keep the sign for the answer (negative or positive) with whatever the larger addend is. So in this letter's situation, the equation would look like this: -5 + 2 = -3.

D.) is incorrect because once again, they are taking the original correct answer and subtracting it from another number, which would be -12.

I hope this helps.

5 0
3 years ago
1. The sum of two numbers is 140 and their difference is 20. What are the two numbers?
zysi [14]

Answer:

Step-by-step explanation:

5 0
3 years ago
What is 12.5% written as a fraction in simplest form
Helga [31]
12.5% goes to .125
so .125 as a fraction is:
\frac{1}{8}
7 0
4 years ago
Read 2 more answers
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