Of the 220 tickets available for a school play 45% have been sold what is the number of tickets that have sold

a 99 c 489
b 175 d 990

It is A

The answer is 99

Step-by-step explanation:

220 multiplied by .045

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