The high school, middle school, and elementary school are all on the same road. the distance from the high school to the middle school can be represented by the expression 8.7x2+11.9x+3.5 . the distance from the middle school to the elementary school can be represented by the expression 3.23x2+2.7x+0.75 . what is the total distance from the high school to the elementary school?

I know how to work it out. The only problem is that your expressions don't make sense because you put the multiplication sign next to the addition sign and that can't work.

Step-by-step explanation:

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.

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4