WARM UP (after 3.2 Word Prob Notes)

Jill is selling cookie dough for her band fundraiser. She knows that she sold 55

tubs of chocolate chip & oatmeal dough combined, but she doesn’t know how

many of each she sold. The chocolate chip cookie dough costs $12.25 per tub, and the oatmeal cookie dough costs $9.75 per tub.

How many of each type of cookie dough did Jill sell if she collected $621.25?

WARM UP (after 3.2 Word Prob Notes)

55 m c

c = # tubs of choc. chip cookie dough

m = 55 – c12.25c + 9.75(55 – c) = 621.25

256217592512 . m . c .

m = # tubs of oatmeal cookie dough

WARM UP (after 3.2 Word Prob Notes)

c = # tubs of choc. chip cookie doughm = # tubs of oatmeal cookie dough

12.25c + 536.25 – 9.75c = 621.25 2.5c + 536.25 = 621.25 2.5c = 85 c = 34

WARM UP (after 3.2 Word Prob Notes)

c = # tubs of choc. chip cookie doughm = # tubs of oatmeal cookie dough

34 tubs of choc. chip cookie doughm = 21

21 tubs of oatmeal cookie dough