Aformula for 8 bottles of window cleaner calls for 6 cups of rubbing alcohol, 2 1/4 gallons of water, and 1 1/2
cups of ammonia.
how many quarts of rubbing alcohol would the formula call for if a factory made 1,280 bottles for stores to sell to customers?

1 quart = 4 cups

 since 6 cups ( 6/4=1.5 quarts) are used for 8 bottles

 than 1280/8 = 160

160*1.5 = 240 quarts are needed

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).

6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153