Write the equation of the circle with center (0, 0) and (−1, −3) a point on the circle.

Solve the system of equations. y= 2x y= x^2 - 15

Players on the school soccer team are selling candles to raise money for an upcoming trip. each player has 24 candles to sell. if a player sells 4 candles a profit of$30 is made. if he sells 12 candles a profit of $70 is made. determine an equation to model his situation?

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?