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FromTheMoon [43]
3 years ago
13

Solve independent system equations for: 5x-9y=-6510x-3y=20x=?y=?​

Mathematics
1 answer:
Sergio039 [100]3 years ago
3 0
5x-9y=-65
10x-3y=20

Multiple the first equation by 2
10x-18y=-130
10x -3y=20
Then subtract the two equations to get rid of the x

21y=-150
Divide the -150 by 21
Y=-7.14

Plug the y into the original equation. (Either one)

5x-9(-7.14)=-65
5x-64.28=-65
Then add 64.28 to the -65
5x=-0.72
Divide by 5
X=-0.144

I hope this is right
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3 years ago
Need help on this please help
kobusy [5.1K]

Answer:

The measure of ∠A is 127°.

Step-by-step explanation:

The interior angles of a triangle always add up to 180°. Since you can fix <em>three</em> triangles into a pentagon, the sum of its interior of angles is 540° You could also look at how many angles there are (5), multiply that number by 180°, then subtract 360° from the product.

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<em>Hope this helps,</em>

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Dos mas treinta y cuatro da resultado a treinta y seis

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5+5=10

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53.8

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53.8

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