C(t)= 87.50t + 12.50 If The student spent a total of $800 on tickets how many tickets did she buy

9 tickets

Step-by-step explanation:

800 - 12.5 = 787.5

87.5t = 787.5

t = 9

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

no

explanation:

you can be freinds, and people but not follow people.