Which of the following are monomials?
check all that apply.
a.19
b. y
c. x^9+y^9
d. x^23
e.13^9+12
f.2x+2

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

I'm confused on this could anyone me and show me what i need to do to solve it.

The acceleration of an object due to gravity is 32 feet per second squared.what is acceleration due to gravity in inches per second squared?