Aparking garage charges $2.88 for the first hour and $0.50 for each additional hour or part of an hour. what is the maximum length of time tom can park in the garage if he wishes to pay no more than $6.88?

2.88 + 0.50r ≤ 6.88

0.5r ≤ 4

r ≤ 8

8 + 1 = 9

He has to stay for no more than 9 hours.

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.