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

6 0

3 years ago

Est. Length: 2:00:00

valentina_108 [34]

Answer:

Step-by-step explanation:

7 0

4 years ago

Steve puts only dimes and quarters into his piggy bank. Right now he has five more dimes than quarters there, and they make $74.

professor190 [17]

D= number of dimes
q= number of quarters
(Keep in mind, it's not the price, but the number of each)
0.1d+0.25q=74.35
d=q+5
0.1(q+5)+0.25q=74.35
0.35q+0.5=74.35
0.35q=73.85
q=211
d=216

6 0

4 years ago

the area of a certain rectangle is 288 square yards the perimeter is 68 yards if you double the length and width what will be th

Ivenika [448]

Answer:576 by 136

Step-by-step explanation:

7 0

3 years ago