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: 28 cups
B: 14 cups
C: 21 cups
D: 7 cups
The recipe calls for 2 parts borax and 2 parts washing soda for every 1 part of soap flakes. Since Lenny is using 7 cups of soap flakes, he would need 2 * 7 = <<2*7=14>>14 cups of borax and washing soda combined.
Therefore, the correct answer is B: 14 cups.
To find the total number of cups of borax and washing soda needed, we need to calculate the sum of the two parts:
1 part borax + 1 part washing soda = 2 parts in total
Since the recipe calls for 7 cups of soap flakes, we can determine the required amount of borax and washing soda by multiplying the ratio of soap flakes to the total number of parts:
Total cups of borax and washing soda = (7 cups soap flakes) x (2 parts / 1 part soap flakes)
= 7 cups x 2
= 14 cups
Therefore, Lenny needs a combination of 14 cups of borax and washing soda, which corresponds to option B: 14 cups.
The recipe calls for 2 parts borax, 2 parts washing soda, and 1 part soap flakes. Since Lenny is using 7 cups of soap flakes, we can determine the amount of borax and washing soda needed by calculating 2 parts of each.
2 parts of borax = 2 * 7 cups = 14 cups
2 parts of washing soda = 2 * 7 cups = 14 cups
To find the combined amount of borax and washing soda, we add them together:
14 cups + 14 cups = 28 cups
Therefore, the answer is A: 28 cups.