3 years ago

write the equation for the following statement. reid is 3 years old. his sister is 4 times older. how old is reid sister.?

2 answers:

6 0

Reid's sister is 12 years old. Because Reid's sister is 4 TIMES older, this indicates it is a multiplication problem. 3 times 4 is 12.

sveticcg [70]3 years ago

3 0

R = 3
s = 4r

s = 4 * 3 = 12 <==

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Maslowich

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8 0

3 years ago

Which represents the inverse of the function f(x) = 4x? h(x) = x + 4 h(x) = x – 4 h(x) = three-quartersx h(x) = one-quarterx

aalyn [17]

Answer:

$\large\boxed{f^{-1}(x)=h(x)=\dfrac{1}{4}x}$

Step-by-step explanation:

$f(x)=4x\to y=4x\\\\\text{exchange}\ x\ \text{to}\ y\to x=4y\\\\\text{solve for}\ y:\\\\4y=x\qquad\text{divide both sides by 4}\\\\\dfrac{4y}{4}=\dfrac{x}{4}\\\\y=\dfrac{1}{4}x$