Find the value of the constant a for which the polynomial x3 ax2−1 will have −1 as a root. (a root is a value of x such that the polynomial is equal to zero. ).

Kevin and randy muise have a jar containing 78 coins, all of which are either quarters or nickels. the total value of the coins in the jar is $13.90. how many of each type of coin do they have?

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Jordan rides his bike 6 7/15 miles every day to deliver newspapers and to go to and from school. if his ride to and from school is 4 3/10 miles, how many miles is the trip to deliver newspapers? 1 1/3 1 1/6 2 1/6 2 4/5