Answer:

Step-by-step explanation:
First, make them on one side of the formula in the form of
which is 
Next, insert the corresponding number in the quadratic formula,
, and the answer can be calculated.
Answer:
19 6j/5
Step-by-step explanation:
6x + y = -40 is the correct answer, please brainliest if you can. Hope that helps :)
Subtract the payment from the previous balance:
4236.87 - 3200 = 1036.87
Now add his total purchases:
1036.87 + 989.42 = 2026.29
This is the total amount he owes, now subtract that from his credit line:
8500 - 2026.29 = 6473.71
His available credit is $6,473.71