3 years ago

Write y=3/5 x+4 in standard form using intergers

Mathematics

1 answer:

jolli1 [7]3 years ago

4 0

Answer:

3x - 5y = -20

Step-by-step explanation:

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Solve both by substitution method (algebra 2) and show work please<br><br> -2x-7y=22<br>-7x-5y=-1

Alex17521 [72]

$\bf \begin{cases}
-2x-7y=22\\
-7x-5y=-1
\end{cases}\qquad \textit{let's solve the \underline{second one} for "x"}
\\\\\\
-7x-5y=-1\implies -7x=5y-1\implies x=\cfrac{5y-1}{-7}
\\\\\\
\boxed{x=\cfrac{1-5y}{7}}\impliedby \textit{now, let's substitute it in the \underline{first one}}
\\\\\\$

$\bf -2\left( \frac{1-5y}{7} \right)-7y=22\implies \cfrac{10y-2}{7}-7y=22
\\\\\\
\textit{now, let's multiply both sides by 7, to toss the denominator}
\\\\\\
7\left( \cfrac{10y-2}{7}-7y \right)=7(22)\implies 10y-2-49y=154
\\\\\\
-39y=156\implies y=\cfrac{154}{-39}\implies \boxed{y=-4}
\\\\\\
\textit{now, let's use that in the \underline{first one}}
\\\\\\
-2x-7(-4)=22\implies -2x+28=22\implies 6=2x\implies \cfrac{6}{2}=x
\\\\\\
\boxed{3=x}$

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3 years ago

George bought 7.5 cases of pancake mix for his diner. A case contains 12 1.3-pound boxes. How many pounds of pancake mix did Geo

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First step

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Second step

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3 years ago

2x + 10 < 24 or -8x + 8 < -56

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Answer:

Union of inqualities:

x<7 or x>8

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3 years ago

Shots invests $1000 in a certificate of deposit that earns interest. The investment’s value is multiplied by 1.02 each year

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Answer:

1000 times 1.02

Here the answer will be 1020.

Step-by-step explanation:

1000 times 1.02= 1020

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