A and b are positive integers and a–b = 3. Evaluate the following:
9^(1/2)^b/3^a

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Liz had 140 pens and inna had 100 pens. after inna gave liz some pens, liz had 3 times as many pens as inna. how many pens did inna give liz?

Evaluate this using ! 0.25^2 x 2.4 + 0.25 x 2.4^2 − 0.25 x 2.4 x 0.65