Michelle has four credit cards with the balances and interest rates listed below. If Michelle wanted to pay off all four credit cards in 36 months, what would her total monthly credit card payment be? Credit Card

Balance

APR
#1

$4,380

17%
#2

$1,365

19%
#3

$2,480

23%
#4

$5,000

15%

a

D) the x-intercept represents adam's commission pay when he had zero total sales

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.