Please help please.

Translate: Calcute The Circumference of the circle

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17

The table below shows the number of free throw shots attempted and the number of shots made for the five starting players on the basketball team during practice. each player's goal is to make 80% of her shots.