9. (06.04 MC)
Calculate the area of triangle WXY with altitude YZ, given W(2, −1), X(6, 3), Y(7, 0), and Z(5, 2). (6 points)

8 square units

9.4 square units

7.7 square units

12 square units

Solve the system of equations y= 3/2 - 1, -x+ y =-3

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

If a is a nonzero real number then the reciprocal of a is