HELP THE ANSWER MUST WORK ON KHAN

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

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares

If i had 1234 apples and 1 banana what is the total amount