Darren runs 1/4 a mile in 2.5 mins. how long will it take him to run a full mile?
1 answer:
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Answer:
Step-by-step explanation:
The given expression is
We will rewrite the expression
When we add the fraction
=
= 8
While Andre says the answer is
because Andre added the denominator where he has to make a common denominator that should be 4 instead of 8.
Andre made mistake in this step
Picture is given below :
Answer:
(x) =
Step-by-step explanation:
let y = f(x), then rearrange making x the subject
y = x + 4 ( subtract 4 from both sides )
y - 4 = x ( multiply both sides by 5 to clear the fraction )
5y - 20 = x
Change y back into terms of x with x = (x) , then
(x) = 5x - 20