13.) 2x + y - z= 5
+ x +4y +2z = 16
15x +6y – 2z= 12
solve

You have 6 dollars +12 pennies +to quarters + 4 dimes=2 nickels how much do you have

Handsome jack is buying a pony made of diamonds. the price of the pony is p dollars, and jack also has to pay a 25% diamond pony tax. which of the following expressions could represent how much jack pays in total for the pony?

6x + 3y = -6 2x + y = -2 a. x = 0, y = -2 b. infinite solutions c. x = -1, y = 0 d. no solution