Question

suppose a 5-minute overseas call costs $6.95 and a 10 minute call costs $11.90. write and solve a linear equation to find the costs for making an 18-minute call.

Answer 1

Answer: $19.82

Explanation:

First subtract the 10 min cost and the 5 mins cost

11.90-6.95 = 4.95

so, 15 mins would cost

11.90+4.95 = 16.85

now you'll need to divide 4.95 with 5

4.95/5 = 0.99

then take the previous cost and add 0.99 to it

16 mins = 16.85+0.99 = 17.84

17 mins = 17.84+0.99 = 18.83

18 mins = 18.83+0.99 = 19.82