2 years ago

QUICK HELP PLEASE! THANK YOU SO MUCH

Mathematics

1 answer:

Oliga [24]2 years ago

6 0

Answer:

fold it up =t

Step-by-step explanation:

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Y is directly proportional to x,and y=216 when x=2. Find y when x=7.

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$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
\textit{we also know that }
\begin{cases}
y=216\\
x=2
\end{cases}\implies 216=k2\implies \cfrac{216}{2}=k
\\\\\\
108=k\qquad therefore\qquad \boxed{y=108x}
\\\\\\
\textit{when x = 7, what is \underline{y}?}\qquad y=108(7)$

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3 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

what is the value of y in the solution to the following system of equations? (5 points) 2x y = −4 5x 3y = −6

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