Find f'(x) if f(x)=3x- 12

Step-by-step explanation:

f(x)=3x-12

f ' (x) = 3x^0 - 0

when you differentiate, you lower the power by one, and multiply the coeffiecient by the original power for 3x in this case we multiply 3 by 1 and lower the power of x to zero, so the x goes away.  and the derivative of any constant, in this case 12, is always 0

4

Step-by-step explanation:

f(x) = 12 and f(x) = 3x

12/3 = 4 and the function for f(x) is 3(4)

4.6875 pounds

step-by-step explanation:

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt