3 years ago

Ratios- 3:6, for every 3 kids there are 6 adults, if there are 120 adults, how many kids are there?

2 answers:

7 0

There are 60 kids. You just have to divide 120 by 2.

5 0

6 Times 20 equals 120
Simply multiply 3 by 20 to make 60
There are 60 kids with 120adults

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LenKa [72]

Answer:

y = $\frac{2}{3}$

Step-by-step explanation:

Given that y varies inversely with x then the equation relating them is

y = $\frac{k}{x}$ ← k is the constant of variation

To find k use the condition y = $\frac{1}{3}$ when x = $\frac{1}{2}$ , thus

$\frac{1}{3}$ = $\frac{k}{\frac{1}{2} }$ = 2k ( divide both sides by 2 )

k = $\frac{1}{6}$

y = $\frac{1}{6x}$ ← equation of variation

When x = $\frac{1}{4}$ , then

y = $\frac{1}{6(\frac{1}{4}) }$ = $\frac{1}{\frac{3}{2} }$ = $\frac{2}{3}$

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xeze [42]

The answer is choice C

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