In five successive hours, a car traveled 40 km, 45 km, 50 km, 35 km and 55 km. In the next five hours, it traveled with an average speed of 65 km per hour. Find the total distance the
car traveled in 10 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.

my answer is$ 12

step-by-step explanation:

because 15 -2=12