3 years ago

7th grade math help lol

Mathematics

1 answer:

ELEN [110]3 years ago

7 0

Step-by-step explanation:

F and C, I think those are the only ones

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The quantity y varies directly with the square of x and inversely with z. When x is 9 and z is 27, y is 6. What is the constant

ira [324]

$\bf \qquad \qquad \textit{double proportional variation}
\\\\
\begin{array}{llll}
\textit{\underline{y} varies directly with \underline{x}}\\
\textit{and inversely with \underline{z}}
\end{array}\implies y=\cfrac{kx}{z}\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------$

$\bf \stackrel{\textit{\underline{y} varies directly with the square of \underline{x} and inversely with \underline{z}}}{y=\cfrac{kx^2}{z}}
\\\\\\
\textit{we also know that }
\begin{cases}
x=9\\
z=27\\
y=6
\end{cases}\implies 6=\cfrac{k9^2}{27}
\\\\\\
\cfrac{27\cdot 6}{9^2}=k\implies 2=k$

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3 years ago

Ace pls help me expert or ace from 1 to 30

myrzilka [38]

Answer:

Step-by-step explanation:

min: 8

max: 28

median: 22

1st Q: 12

3rd Q:26

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2 years ago

I need help with this.

Sedaia [141]

The two lines are parallel, no matter how long they travel they will not cross.

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2 years ago

A basketball team scored 78 points in their championship win over their rival. The team scored 25 baskets worth 2 points and mad

solong [7]

25(2) + 7(1) + 3x = 78....x represents the number of 3 point shots
50 + 7 + 3x = 78
57 + 3x = 78
3x = 78 - 57
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3 years ago

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Diano4ka-milaya [45]

5/2 is the answer.

Have a nive day!

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3 years ago