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Oliga [24]
3 years ago
5

Could someone help me do this using substitution I don't know how to do this for math

Mathematics
2 answers:
umka21 [38]3 years ago
5 0
X=y-7 and x=2-8y  if there is a solution x=x so

y-7=2-8y  add 7 to both sides

y=9-8y   add 8y to both sides

9y=9  divide both sides by 9

y=1, and since x=y-7

x=1-7=-6

So the solution is the point (-6, 1)
gizmo_the_mogwai [7]3 years ago
5 0
If X=y-7 you put that into the other problem: y-7=2-8y. Then you combine like terms: 9y=9. Get the unknown by itself: divide both sides by 9: y=1. Then you put what y= into the first problem: X=1-7 then X=-6.
So X=-6, Y=1. :) hope this helps!
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<h3>What is compound interest?</h3>

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A = P(1 + \frac{r}{n})^{nt}

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Given the principal amount is $12,385, the rate of interest is 7.5%, and the time period is daily. Therefore, the amount can be written as,

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Step 2: Reduce

Reduce the tail of the answer above to two numbers after the decimal point:

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To check that the answer is correct, use your calculator to confirm that 2.82 is about 8.

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