SOLUTION: The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after
25
minutes of calls
Algebra ->
Finance
-> SOLUTION: The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after
25
minutes of calls
Log On
Question 1086493: The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after
25
minutes of calls is
$26.50
, and the remaining credit after
53
minutes of calls is
$22.58
. What is the remaining credit after
61 minutes of calls ?
You can put this solution on YOUR website! set it up as an ordered pair
(25, 26.50)
(53, 22.58)
the slope is -3.92/27=-0.14152
61 minutes is 8 more than 53. Multiply that 8 by the slope and get -1.16
That is subtracted from the $22.58 to get $21.42
