Pls help with my math! It’s the end of the year and I’m having a hard time trying to finish on time!

Step-by-step explanation:

5). 3x + y = 5 -------(1)

    2x - y = 10 ---------(2)

    By adding equation (1) and (2),

    (3x + y) + (2x - y) = 5 + 10

    5x = 15

    x = 3

    From equation (1),

    3(3) + y = 5

    y = -4

6). 4x + 3y = 13 -------(1)

    x + y = 4 -------(2)

    Multiply equation (2) by 3 and subtract it from equation (1)

    (4x + 3y) - (3x + 3y) = 13 - 12

    x = 1

    From equation (2),

    1 + y = 4

    y = -3

7). x - 7y = 7 -----(1)

    -3x + 21y = -21

    -3(x - 7y) = -(3 × 7)

     x - 7y = 7 -------(2)

    Since, equation (1) and (2) are same, system of the equations will have infinitely many solutions.

8). x - 3y = 12

    3y = x - 12

    --------(1)

    3x - 9y = 18

    3(x - 3y) = 3(6)

    x - 3y = 6

    3y = x - 6

    ----------(2)

  Slopes of both the equations are same but the y-intercepts are different.

Therefore, both the lines are parallel and the system of equations will have no solution.

12 cups   is the answer

step-by-step explanation: