Grace wants to attend University of Oklahoma. One year at University of Oklahoma costs approximately $20,000. She currently has $4,000 in savings. Grace has received a one-time grant of $1,000 and an annual academic scholarship for $4,000. She plans to enroll in the work study program that will pay $9,000 annually for part-time work. How much will Grace need to borrow in student loans in order to attend University of Oklahoma for 4 years?
Grace needs to borrow $23,000 in students loan in order to attend University of Oklahoma for 4 years.
Cost for one year at University of Oklahoma = $20,000
Cost for 4 years = 4 × $20,000 = $80,000
Total amount Grace would have in 4 years = $4,000 + $1,000 + ($4,000×4) + ($9,000×4) = $57,000
Amount she needs to borrow = $80,000 - $57,000 = $23,000
see u first need to check which is the most close the given value now you need to choose middle value and hence the margin will be the difference divided by two with a plus and minus sign.
over here its 26.5-22.4=4.1
now dividing by 2 we get 2.05
hence the margin error is ± 2.05
now add this to 1st number or subtract from the second no. and hence thats the no. from which the no. is deviated 22.4 ± 2.05
(x, y) = (3, 5)
it works well to divide the first equation by 2, so the system isx -y = -2x +y = 8
now, adding the two equations together gives
2x = 6
x = 3 . . divide by 2
substituting that into either equation gives you an equation for y.
3 - y = -2
5 - y = 0 . . add 2
5 = y . . . . add y
the solution is (x, y) = (3, 5).