Question

Adriana is making a salad dressing to go with food she has prepared for lunch with her two friends. She makes the dressing 1 part vinegar to 2 parts oil.

She has invited two more friends to join and so needs to make more dressing. She now uses 450ml of oil. How much vinegar willl she use? __ mI of vinegar.

Answer 1

Adriana will need to use 225ml of vinegar to maintain her 1:2 ratio of vinegar to oil when she uses 450ml of oil.

Step-by-step explanation:

The student's question involves determining the amount of vinegar needed for a salad dressing using a ratio. Adriana originally uses 1 part vinegar to 2 parts oil. For more guests, she is using 450ml of oil. To maintain the same ratio, the amount of vinegar she will need must be half of the oil, given that vinegar is to oil in a 1:2 ratio.

We calculate the necessary amount of vinegar by dividing the amount of oil by 2:

450ml oil ÷ 2 = 225ml vinegar

Therefore, Adriana will need to use 225ml of vinegar for her salad dressing.

Adriana is making a salad dressing using a ratio of 1 part vinegar to 2 parts oil. She initially uses an unspecified amount of oil to make the dressing. Now, she needs to make more dressing using 450ml of oil. To find out how much vinegar she will use, we can set up a proportion. Since the ratio is 1:2, we can write the proportion as (x/450) = (1/2), where x represents the amount of vinegar she needs. To solve for x, we can cross multiply and then divide: 2x = 450, x = 450/2, x = 225. Therefore, Adriana will use 225 ml of vinegar.