Someone plz help me

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

Acompany that makes? hair-care products had 5000 people try a new shampoo. of the 5000 ? people, 35 had a mild allergic reaction. what percent of the people had a mild allergic? reaction?

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)