I have to find angles mnop for 7 and wxyz for 8

Step-by-step explanation:

7

Trapezium MNOP

Top two angles are equal as it is isosceles

Angles O and P are equal too and they are supplementary with angles M and N. Supplementary angles add up to 180° as per definition.

8

Similar to problem 7, we have isosceles trapezium WXYZ

∠X and ∠Y are supplementary angles:

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.

.25

step-by-step explanation: