Me. ive tried all of them, none of them give me the right answer when i do it.

what is the solution to this equation?
16x-10x+9 = 99-30

a) x=11
b) x=12
c) x=10
d) x=13

Which sentence describes why polygon mnop is congruent to polygon jklp? a. polygon jklp maps to polygon mnop through a translation. b. polygon jklp maps to polygon mnop through a rotation. c. polygon jklp maps to polygon mnop through a dilation. d. polygon jklp maps to polygon mnop through a stretch.

Asphere has a diameter of 10 in. what is the volume of the sphere?

Which of the following parabolas opens down?