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3 years ago

5

Micah is three more than 5 times the age of his sister. If Micah is 18 years old, then what is the age of his sister? Identify t

he two operations, in their appropriate order, needed to solve this problem

1 answer:

Korolek [52]3 years ago

3 0

Answer:

His sister is 3 years old.

Step-by-step explanation:

Micah - M

Sister - S

M = 3 + 5S

18 = 3 + 5S

15 = 5S

3 = S

His sister is 3.

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mrs_skeptik [129]

Answer:

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Step-by-step explanation:

<u>Ratios </u>

We are given the following relations:

$a=\sqrt{7}+\sqrt{c}\qquad \qquad[1]$

$b=\sqrt{63}+\sqrt{d}\qquad \qquad[2]$

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From [3]:

$9c=d$

Replacing into [2]:

$b=\sqrt{63}+\sqrt{9c}$

We can express 63=9*7:

$b=\sqrt{9*7}+\sqrt{9c}$

Taking the square root of 9:

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Factoring:

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Find the ration a:b:

$\displaystyle a:b=\frac{\sqrt{7}+\sqrt{c}}{3(\sqrt{7}+\sqrt{c})}$

Simplifying:

$\boxed{a:b=\frac{1}{3}}$

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