3 years ago

Anybody ? Need help.

Mathematics

2 answers:

forsale [732]3 years ago

8 0

Idk what you mean ? Uh

Igoryamba3 years ago

6 0

B is correct. Rearrange the equation given.

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The function of (x) varies directly with x^2, and f(x)=96 when x=4 what is the value of f(2)

makkiz [27]

$\bf \qquad \qquad \textit{direct proportional variation}
\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------$

$\bf \textit{f(x) varies directly with }x^2\qquad f(x)=kx^2
\\\\\\
\textit{we also know that }
\begin{cases}
f(x)=96\\
x=4
\end{cases}\implies 96=k(4)^2\implies 96=16k
\\\\\\
\cfrac{96}{16}=k\implies 6=k\qquad therefore\qquad \boxed{f(x)=6x^2}
\\\\\\
\textit{now, when }\stackrel{f(2)}{x=2}\textit{ what is \underline{f(x)}?}\qquad f(2)=6(2)^2$

3 0

3 years ago

nia has number cards for 2,3,8,9,5. what are all differents ways nia can arrange the cards to show only even number with the 2 i

trasher [3.6K]

23958
29538
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I think this is what you meant.

8 0

2 years ago

Kevin has $25. MP3 downloads cost $0.75 each. How many songs can he download and still have $13 left to spend?

matrenka [14]

It would be .75x=25-13
So .75x=12
x=16 because .75×16=12

8 0

3 years ago