If f (x) = 3, what is the value of f (-7)

A. x -10
B. 3
C. -4
D. -21

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

Will mark brainliest! ( explain the answer too, it can be one sentence)

Anew movie is released each year for 14 years to go along with a popular book series. each movie is 2 minutes longer than the last to go along with a plot twist. the first movie is 70 minutes long. use an arithmetic series formula to determine the total length of all 14 movies