Answer:
Please check the explanation.
Step-by-step explanation:
Given
f(x) = 3x + x³
Taking differentiate



solving






now solving




Thus, the expression becomes


Thus,
f'(x) = 3 + 3x²
Given that f'(x) = 15
substituting the value f'(x) = 15 in f'(x) = 3 + 3x²
f'(x) = 3 + 3x²
15 = 3 + 3x²
switch sides
3 + 3x² = 15
3x² = 15-3
3x² = 12
Divide both sides by 3
x² = 4



Thus, the value of x will be:

19+12=p-12+12
So the answer will be 31=p.
Answer:
meeee plzzzzzzz even thow i have no idea whta that ios
Step-by-step explanation:
Answer:
b $.05
Step-by-step explanation:
5 lbs is .80 and 8 lb is .75 so a 5 cent difference per lb