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3 years ago

-6x+3y=-39 -6x-3y=-21 solve the system of equations

Mathematics

2 answers:

zimovet [89]3 years ago

5 0

The answer is the one on top

solmaris [256]3 years ago

4 0

Answer:

x=5,y=-3

Step-by-step explanation:

$\left \{ {{-6x+3y=-39} \atop {-6x-3y=-21}} \right. \\-12x=-60\\12x=60\\x=\frac{60}{12} \\x=5$

$-6(5)+3y=-39\\-30+3y=-39\\3y=-39+30\\3y=-9\\y=-\frac{9}{3} \\y=-3$

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3 years ago

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alexdok [17]

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Step-by-step explanation:

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So the side of the nonagon is 13

The area of the nonagon is .

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Put value of side in above equation

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