Question

Which expression is equivalent to (5y^2)(2y^-3)
A~ 7y^-6
B~ 10y^-6
C~ 7y^-1
D~ 10y^-1

Answer 1

start by adding the exponents

Answer 2

2 - 3 = ?

Answer 3

2 - 3 = -1

Answer 4

good so our y term becomes y^(-1)

Answer 5

then we just multiply the constants 5*2 = 10

Answer 6

giving us 10y^(-1)