Asking for this question again! please help

Phillip had some bricks. he stacked them in 6 equal piles. which expression shows the number of bricks phillip put in each pile? let the variable m stand for the unknown number of bricks. m + 6 m÷6    m−6    6m

For f(x)=2x+1 and g(x)= x^2 -7, find (f•g)(x)

Which of the following tables represents exponential functions?