Select the expressions that are polynomials. Question options:

x^2/7+1

x^−3+4x

−2x3+2x+4

6x−x^3+4x^2

3.5

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.