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sweet-ann [11.9K]
3 years ago
10

Solve the following system of equations for x and y.

Mathematics
1 answer:
Mademuasel [1]3 years ago
4 0
<h2>Answer:</h2>

We can solve this system by elimination to solve for y by multiplying the top equation by 4 and the bottom one by -5.

4(5x + y = 2)\\-5(4x - 2y = 10)\\\\20x + 4y = 8\\-20x + 10y = -50\\\\14y = -42\\\\y = -3

Now, with what we got for y, we plug it back into one of the original equations. I chose the top one.

5x + 7 = 2\\\\5x = -5\\\\x = -1

Now we have the solution of this system

The solution is <em>A. (-1, -3)</em>.

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Simplify 2a^2b^3(4a^2+3ab^2-ab)
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2a^2b^3(4a^2+3ab^2-ab)=? 
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is what I presume you actually meant. </span>
<span>
Pull out the common factors of (4a^2+3ab^2-ab) and you will get </span>
<span>
a(4a+3b^2 -b) </span>

Substitute this back into the original equation and you get 
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2a^2b^3[a(4a+3b^2-b)] = </span>
2a^3b^3(4a+3b^2-b) = 
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3 years ago
Solve for c<br><br>c^2+10c+16
miv72 [106K]

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3 years ago
A rectangle and a square have the same perimeter. One side-length of the rectangle is $25\%$ longer than the other. What is the
S_A_V [24]

corrected question:

A rectangle and a square have the same perimeter. One side-length of the rectangle is 25% longer than the other. What is the ratio between the areas of the rectangle and the square?

Answer:

ratio of area of recatngle to square= 0.9879

Step-by-step explanation:

perimeter of rectangle = 2(L+B)

perimeter of a square =4L_(s)

L=B+0.25B

L=1.25B

4L_(s)= 2(L+B)

4L_(s)= 2(1.25B+B)

4L_(s)= 2(2.25B)

4L_(s)= 4.5B

B= 4/4.5 L_(s)

B= 0.889 L_(s)       ..........equ1

area of square =L_(s)^{2}

area of rectangle = L*B

                           =1.25B*B=1.25B^{2}

ratio of area of recatngle to square =\frac{1.25B^{2} }{L_{s} ^{2}}

referring to equ 1

ratio of area of recatngle to square = \frac{1.25* (0.889L_{s}) ^{2} }{L_{s} ^{2}}

=\frac{ 0.9879L_{s} ^{2} }{L_{s} ^{2}}

ratio of area of recatngle to square= 0.9879

8 0
3 years ago
Need help with 2, 4, and 5
kondaur [170]

Answer:

2) Supplementary

4) Congruent

5) Supplementary

Step-by-step explanation:


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3 years ago
What's the standard form for 79,031
RoseWind [281]
The standard from of 79,031 is 70,000 + 9000+ 30+ 1
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3 years ago
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