3. greg is going to solve the system of linear equations below. first equation: 74x10 second equation: 74x10 which of the following would greg not use to solve this system of equations?
a. solve the second equation for y and then substitute the result into the first equation.
b. multiply the first and second equation by -6 to eliminate the y variable.
c. solve the first equation for y and then substitute the result into the second equation.
d. multiply the first equation by 3 and the second equation by 2 to eliminate the y variable.

4. when using elimination to solve 2x-3y = 4 7x+ 6y = -1 what would be a possible first step?
a. 4x – 6y = 8 7x + 6y = -l
b. x = 3/2y + 2 7x + 6y = -1
c. 2x -3y = 4 x = -6/7y – 1/7
d. y = 2/3x – 4/3 7x + 6y = -1

5 sam purchased two bottles of water and three hot dogs at the ballpark for $8.50. mary purchased one bottle of water and two hot dogs for $5.25. what system of equations could be solved to determine the prices in dollars of a hot dog (7x8 ) and a bottle of water (9x5 )?
a. 105x30
b105x30
c 93x30
d. 105x30

6. given: 2x + y = 0 x – y = 6 what is the solution to the system of equations? a. (1, -2)
b. (2, -4)
c. (4, -2)
d.(5, -1)

7 solve: 3x + y = -8 2x – y = 3
a (-1, -5)
b (3,3)
c (-2, -2)
d infinitely many solutions