The measure of an angle is 4y°. find the measure of its supplement.
a) (180 + 4y)°
b) (180 - 4y)°
c) (90 + 4y)°
d) (90 - 4y)°

What is the value of the expression below? (81^2)^1/8

Find the multiplicative inverse of 8-12i

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers