EDUC 301 Math Practice

Question

At Joe's café, one cup of coffee and three doughnuts cost $3.50, and two cups of coffee and two doughnuts cost $3.80. You may find it helpful to use this diagram that was used by a student to solve this problem.

Answer 1

C + 3d = 350

2c + 2d = 380

C = 350 - 3d

c + d = 190

350 - 3d + d = 190

-2d = -160

d = 80

c = 110

coffee costs $1.10 and donut costs 0.80