Write the equation of the circle that has a center at (0,-2) and a radius of 3.

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Cesar bought 7 items at the candy store. he bought candy bars for $0.50 each and packs of gum for $0.95 each. he spent a total of $6.80. what system represents the solution for the number of candy bars (x) and the number of pack gum (y) purchased?

Systems of linear equation problem. with the wind a cyclist rode 24 miles in three hours. she returned in twelve hours against the wind. find the rate of the cyclist without wind and the rate of the wind.