Angle A and B have a sum of 187º. Angle A is 12 more than 3
times a number, angle B is 7
more than 5 times the same
number. What is the measure of
angle A and angle B?

let no. be x

A= 12+ 3x

B= 7+5x

A+B=187

12+7+3x+5x=187

x=21

therefore, A=75°

B=112°

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

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.