Please help, i am being timed!! Which expression is equivalent to StartFraction 7 Superscript 5 Over 7 squared EndFraction?

A) (7 times 5) (7 times 2)

B) (7 times 7 times 7 times 7 times 7) (7 times 7)

C) StartFraction 7 times 5 Over 7 times 2 EndFraction

D) StartFraction 7 times 7 times 7 times 7 times 7 Over 7 times 7 EndFraction

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.

20 ! brainliest ! add and simplify your answer.

Out of five men and five women, we form a committee consisting of four different people. assuming that each committee of size four is equally likely, find the probabilities of the following events: 1. the committee consists of two men and two women 2. the committee has more women than men. 3. the committee has at least one man. for the remainder of the problem assume that alice and bob are among the ten people being considered. 4. both alice and bob are members of the committee.