7x - 2 PLEASE HELP I NEED ANSWERS NOW
1 answer:
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The word you're looking for is "differentiate", not "derive".
Answer:
see explanation
Step-by-step explanation:
let y = f(x) and rearrange making x the subject, that is
y = x + 4 ( multiply through by 2 to clear the fraction )
2y = x + 8 ( subtract 8 from both sides )
2y - 8 = x
Change y back into terms of x with x = (x) , then
(x ) = 2x - 8
(4) = 2(4) - 8 = 8 - 8 = 0