Solve the system of equations. 3x – 7y = 5 9y = 5x + 5
a.
(–3, 2)
b.
(8, 5)
c.
(–10, –5)
d.
(0, 0)

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Ответ:

isabelle1670

10.09.2022

Mathematics

$22.5\%\ \text{decrease}$

Step-by-step explanation:

Given

Darin sold 62 pairs of soccer cleats this week

He sold 80 pairs last week

Percentage change is given by

$\Rightarrow \%\text{change}=\dfrac{\text{New-old}}{\text{old}}\times 100\\\\\Rightarrow \%\ \text{change}=\dfrac{62-80}{80}\times 100\\\\\Rightarrow \%\ \text{change}=-22.5\%\ or\\\\\Rightarrow 22.5\%\ \text{decrease}$

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Solve the system of equations. 3x – 7y = 5 9y = 5x + 5 a. (–3, 2) b. (8, 5) c. (–10, –5) d. (0, 0)