Question

Mara bought a bag that contained 16

Answer 1

Answer:

9 batches of cookies

Step-by-step explanation:

Mara bought a bag that contained 16

cups of sugar. She uses 2/3 cup of

sugar each time she makes a batch of

cookies. If the bag now has 10 cups of

sugar left, how many batches of cookies

has she made? (Show equation)

Well, if the bag originally had 16 cups and now it has 10 cups, then you have to subtract 10 from 16 (16-10). 16 - 10 = 6 cups used. Now you have to divide 2/3 from 6 (6 ÷ 2/3). 6 ÷ 2/3 = 9 batches of cookies.

Answer 2

Answer:

• 2/3b = 6
• 9 batches

Step-by-step explanation:

You can write an equation for the total amount of sugar, or you can write one for the amount used. If b is the number of batches of cookies, 2/3b is the number of cups of sugar used to make cookies.

  2/3b + 10 = 16 . . . . . all of the sugar

  2/3b = 6 . . . . . . . . . .cups of sugar used

The second equation is the result of subtracting 10 from the first equation.

  b = (3/2)(6) = 9 . . . . . multiply by 3/2

Mara made 9 batches of cookies.