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puteri [66]
3 years ago
14

Solve the system of linear equations by elimination −2x+3y=7 and 5x+8y=−2

Mathematics
1 answer:
forsale [732]3 years ago
4 0
You would need to make them eliminate so I would multiply the entire first one by 2.5 to make the X's cancel out. So you would end up with -5X+7.5Y=17.5. The X's would cancel and you would be left with 15.5Y=15.5. So Y=1. Then replace Y into one of the equations. I'm going to use the top again. -2X+3(1)=7. Subtract 3 from both sides to get -2x=4. Divide both sides by negative 2 to get X=-2. So the solution would be (-2,1)
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I need number 2 I need help fast
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Answer:

B. 70

Step-by-step explanation:

<h3><u>look at the smaller triangle</u></h3>

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<h3><u>look at the bigger triangle ( this includes the dimensions of the smaller one)</u></h3>

its dimensions are :

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from the dimensions given we can notice that :

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<em></em>

therefore to find the value of x :

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<h3>How to compute the values?.</h3>

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The area to the left of -0.47 will be:

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