Jill has a gift certificate for a movie rental. Each time she rents a movie, $6 is deducted from her gift certificate balance. If m represents the number of movies Jill rents, which of these expressions can be used to determine her gift certificate balance?

x - 6m

Step-by-step explanation:

Let the amount of gift certificate be x

If $6 is deducted everytime she watches as movie, then the total deduction for m movies watched will be $6m.

Her gift balance certificate = initial gift balance she has - total deduction for m movies

Her gift balance certificate = x - 6m

Hence the expression that can be used to determine her gift balance certificate is x - 6m

f(2x−x2)=−3x2+6x−1

step-by-step explanation:

set up the composite function and evaluate.

f(2x−x2)=−3x2+6x−1