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?(1 point)
Responses
21 cups
21 cups
14 cups
14 cups
7 cups
7 cups
28 cups
The recipe calls for 2 parts borax and 2 parts washing soda, so Lenny needs a total of 2+2 = <<2+2=4>>4 parts of borax and washing soda combined.
If Lenny uses 7 cups of soap flakes, which is 1 part in the recipe, then he needs 4 parts of borax and washing soda combined, which is 4*7 = <<4*7=28>>28 cups. Answer: \boxed{28}.
To determine how many cups of borax and washing soda combined Lenny needs, we need to calculate the total amount of soap flakes used and then determine the amounts of borax and washing soda needed in the same ratio.
Given that Lenny uses 7 cups of soap flakes, the total amount of laundry soap he will make is 7 cups.
The recipe calls for 2 parts borax and 2 parts washing soda for every 1 part of soap flakes. This means that the ratio of soap flakes to borax and washing soda is 1:2.
To find the total amount of borax and washing soda needed, we can divide the total amount of soap flakes (7 cups) into three equal parts since the ratio is 1:2.
So, each part is equal to 7 cups / 3 = 2.33 cups.
Therefore, Lenny needs a combined total of 2.33 cups of borax and 2.33 cups of washing soda.
Rounded to the nearest whole number, Lenny needs 2 cups of borax and 2 cups of washing soda.
Thus, the correct answer is 4 cups.
To find out how many cups of borax and washing soda Lenny needs, we need to calculate 2 parts of borax and 2 parts of washing soda.
Since Lenny is using 7 cups of soap flakes, we can use the ratio provided in the recipe to determine the amounts of borax and washing soda needed.
For borax:
2 parts (from the ratio) = 2 * 7 cups of soap flakes = 14 cups of borax
For washing soda:
2 parts (from the ratio) = 2 * 7 cups of soap flakes = 14 cups of washing soda
Therefore, Lenny needs a total of 14 cups of borax and 14 cups of washing soda combined.