7. Evaluate the following expression for n = 4.
2n? - 8

Simply replace n with 4 and do the math.

2n - 8

Let n = 4

2(4) - 8

8 - 8 = 0

0

b

step-by-step explanation:

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.