Help!!

What is the value of -2 xy if x = -1 and y = 6?

-12
12
8
26

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

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

Two angles are complementary. the larger angle is 36 more than the smaller angle. what is the measure of the larger angle?