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 cost of making an 18-minute call.

5 min = 6.95 10 min = 11.90 18 min = x
so, the difference between 5 min and 10 min = 11.90-6.95 = 4.95 15 min = 11.90+4.95 = 16.85 now, 4.95/5 =0 .99. Then, 16 min = 16.85+0.99 = $17.84 17 min = 17.84+0.99 = $18.83 18 min = 18.83+0.99 = $19.82 Answer

Answered by Priti | 2024-06-24

The cost of making an 18-minute overseas call can be determined using a linear equation based on previous call duration and charges. By establishing the cost per minute, we derived the equation y = 0.99 x + 1.00 and found that y ( 18 ) = 18.82 . Thus, the cost of the call is $18.82.
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Answered by Anonymous | 2024-09-30