Marty is earning at a rate of $3 per day. After 14 days he has earned $68. The amount of money in his account depends on the number of days that have passed.

Question

a. Write an equation that models this situation

b. How much money will smarty have after 30 days?

c. How many days have passed it Marty has $350?

Answer 1

b. 30-14=16. 3x16= 48. 48+68=$136 after 30 days

c. 350-68= 282. 282/3= 94. 94+14= 108 days at $350

a, is confusing, as in 14 days he earned $3 per day = 14x3= $52, yet the problem says he earned $68.

earnings = E = 3d +16 might be the model with d=days and 16 = some extraneous earnings independent of days worked