Find the center and radius of the circle with equation (x+7)^2 + (y+5)^2 = 81

Which recursive formula can be used to determine the total amount of money earned in any year based on the amount earned in the previous year? f(n+1)=f(n)+5

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

Which type of graph would allow us to compare the median number of teeth for mammals and reptiles easily