Question

According to a salad recipe, each serving requires 9 teaspoons of vegetable oil and 6 teaspoons of vinegar. If 45 teaspoons of vegetable oil were used, how many teaspoons of vinegar should be used?

A) 30 teaspoons
B) 45 teaspoons
C) 27 teaspoons
D) 18 teaspoons

Answer 1

Option A. To find out how many servings 45 teaspoons of oil makes, we divide 45 by the amount of oil per serving (9), which equals 5 servings. Multiplying 5 servings by the amount of vinegar per serving (6) gives us 30 teaspoons of vinegar.

Step-by-step explanation:

The student's question asks how many teaspoons of vinegar should be used if 45 teaspoons of vegetable oil were used, given that each serving of a salad requires 9 teaspoons of vegetable oil and 6 teaspoons of vinegar. To find the answer, we need to maintain the proportion between the oil and vinegar.

For every serving, we use 9 teaspoons of vegetable oil and 6 teaspoons of vinegar. To find out how many servings 45 teaspoons of oil makes, we divide the total amount of oil by the amount of oil per serving:

45 teaspoons of oil ÷ 9 teaspoons of oil per serving = 5 servings

Next, we multiply the number of servings by the amount of vinegar per serving to find the total amount of vinegar needed:

5 servings × 6 teaspoons of vinegar per serving = 30 teaspoons of vinegar

Therefore, the answer is A) 30 teaspoons of vinegar.