SOLUTION: Frank is buying a laptop for $650 to use for school. He is going to purchase the computer on credit—he’ll pay $45 per month toward the balance. Write and graph an equation to r
Question 1171089: Frank is buying a laptop for $650 to use for school. He is going to purchase the computer on credit—he’ll pay $45 per month toward the balance. Write and graph an equation to represent how much money Frank owes on his laptop over time. Then calculate how many months it would take Frank's balance to be $290. Found 2 solutions by Boreal, ikleyn:Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! amount owed=650-45x, a slope of -$45 representing decrease of debt per month.
290=650-45x
45x=360
x=8 months
The requested formula / (function) is
D(t) = 650 - 45*t dollars,
where D(t) is the debt after t months, t is the time (in months).
The formula says that the price for the comp is 650 dollars, and every month the debt is decreasing by 45 dollars.
Regarding the plot, make it on your own.
You may use your graphing calculator or free of charge plotting tool at the site www.desmos.com .
To answer the last question, write and solve this equation
650 - 45*t = 290.
You will get then
t = = 8 months. ANSWER
