3 years ago

Solve: 4 = k/7 a. 24 b.11 c. 32 d. 28

Mathematics

2 answers:

Margarita [4]3 years ago

8 0

Answer:

D. 28

Step-by-step explanation:

$4 = \frac{k}{7} \\\\28 = k$

zheka24 [161]3 years ago

6 0

Answer:

Step-by-step explanation:

D because 28 divided by 4 is 7 which means k=28

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3 years ago

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}
\\\\\\
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3 years ago

The polygons below are similar. Find the value of y.

elena-14-01-66 [18.8K]

Answer:

Im sorry bro but there's no picture

Step-by-step explanation:

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You need to get to class, 200 meters away, and you can only walk in the hallways at about 1.5 m/s. (if you run any faster, you’l

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Answer:

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Step-by-step explanation:

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3 years ago

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Semenov [28]

Answer:

Step-by-step explanation:

Additive identity is 0.

step 3 used the additive identity property.

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