Plugging in the numbers 7x - 2y = 39 fitted and made sense
They charge $30 per month as a base so that is y
They also charge $0.25 per text message, this is x
so $0.25x+$30y=$59.50
first subtract 30 from both sides to get x alone
$0.25x=$29.50
To find amount of text messages sent, we have to divide
$29.50/$.25
29.50/.25=118
This person sent 118 text messages
Amount left in account after paying for music class = $87.60 - $25.60 = $62
Amount in the bank account after 10 months = $62 x 10 = $620
Amount spent to go to the summer camp = 1/4 x $620 = $155
Just go to were the line intercepts the y axis so -2 and rise over run so 2 up and 2 over but its negative so C should be correct.
The answer is 0.135............................
