S is between R and T. Determine the value of x and the length of RT

8x+3+4x+6=20x+40

Step-by-step explanation:

solve the equation for x and plug x back into the section you want to find its length

I can't explain stuff too well but I hope this helps good luck :)

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.

answer: asdfghjkl,mnbv

step-by-step explanation: