Mara bought a bag that contained 16
cups of sugar. She uses two-thirds 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)

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.

inequality:

620-37.4p ≥ 450

the minimum amount of packages needed to be removed from the elevator is 5.

step-by-step explanation:

answer: d. $20

step-by-step explanation:

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