Marty is spending money at the average rate of $3 per day. After 14 days he has $68 left.

a) Write the equation to model this situation, where x is the number of days.

b) Use the equation to determine how much money Marty had two weeks ago.

c) Use the equation to determine when Marty will run out of money if he continues to spend at this rate.

Question

Mathematics

Nathalia Lara

16 October, 20:55

Marty is spending money at the average rate of $3 per day. After 14 days he has $68 left.

a) Write the equation to model this situation, where x is the number of days.

b) Use the equation to determine how much money Marty had two weeks ago.

c) Use the equation to determine when Marty will run out of money if he continues to spend at this rate.

+1

Answers (2)

Know the Answer?

Atticus Conner · Answer 1

A) 110 - (3 * 14x) = 68

B) 3*14 is 42 so he spent $42 in two weeks 42+68 = 110 so he had $110 to begin with

C) he will run out of money in about 22 days (22.6666666667)

Pixie · Answer 2

Spent a day = $3

After 14 days = $68 left

a) x = 3

14x = - 68

14x + 68 = 0

b) 14 (3) + 68 = $120

c) total money = y

y - 14x = 120

y = 14 (3) + 120

y = 172

172 - 3n = 0

3n = 172

n = 57 days and 8 hours

Sorry If I am wrong, but I've tried my best to give you the solution ...