The ratio of soap flakes to borax and washing soda is 1:2. This means that for every 1 cup of soap flakes, Lenny will need 2 cups of borax and washing soda combined.
Therefore, if Lenny uses 7 cups of soap flakes, he will need 2 * 7 = <<2*7=14>>14 cups of borax and washing soda combined.
So, the answer is C. 14 cups.
Lenny is making his own laundry soap. The recipe calls for 2 parts borax, 2 parts washing soda, and 1 part soap flakes. If Lenny uses 7 cups of soap flakes, how many cups of borax and washing soda combined does he need?
A. 7 cups
B. 21 cups
C. 14 cups
D. 28 cups
1 answer
1 answer