Molly is baking oatmeal raisin cookies and chocolate chip cookies. She has no more than 10 cups of flour. A batch of oatmeal rai
sin cookies, r, takes 1 and 1/2 cups of flour and a batch of chocolate chip cookies, c, takes 2 cups of flour. Which of these best represent the amount of flour available for Molly to use in her cookies? Group of answer choices
a. 7/2 (r+c) > 10
b. 3/2 r < 10+2c
c. 2c=10-3/2r
d. 3/2r+2c<10
a and d both have lines under the greater than or less than signs.
The amount of flour Molly needs for r batches of oatmeal raisin cookies is ...
3/2r
The amount of flour Molly needs for c batches of chocolate chip cookies is ...
2c
The total amount of flour Molly can use for cookies cannot exceed the amount available, so ...
3/2r + 2c ≤ 10
_____
<em>Comment on the question</em>
The wording is a bit odd. It asks for the amount of flour available—after it tells you the amount available is 10 cups. (I might write that as <em>f ≤ 10</em>.) The answer choices clearly suggest that what is wanted is a representation of the possible mix of batches of cookies for which Molly could use the available flour. IMO, this is another instance of poor editing of math problem wording.
