F(x)=|x|
a parent function is the basic function before it has undergone transformations.
Hey there :)

↓ Is the same as

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Since it is a division by fraction, we can multiply by what is called the reciprocal
( The attached picture might help you )
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↓ For this part, we need the common denominator, which is 6

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Your final answer
5x10 in expanded form is 500.
Suppose that this person drives at r mph going to the mountains, and gets there in 12 hours. Returning, this person drives at (r+20) mph and gets home in 8 hours. We don't know the distance yet, but can solve for the initial speed, r, by setting
d = 12r = (r+20)(8). Solving for r, r=40 mph (going) and (40+20)mph = 60 mph (returning. Since d=12 r, d = (12 hrs)(40 mph) = 480 miles (answer).