25r – 45 = 155
solve for r

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

Hich equation can pair with x + 2y = 5 to create an inconsistent system? 2x + 4y = 3 5x + 2y = 3 6x + 12y = 30 3x + 4y = 8

Gabrielle's age is three times mikhail's age. the sum of their ages is 40 . what is mikhail's age? __ years old