lol im doing the review to my midterm for math, and i completely forgot how to do this, can someone tell me the steps or something? i wish there was more context but this is all i can give.

A

Step-by-step explanation:

Two interior angles on the same side of a transversal intersecting 2 parallel lines are supplementary.

121 + x + 70 = 180

191 + x = 180

x = 180 - 191

x = - 11

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.