July 1 July 2 July 6 July 15 July 23 July 25The billing cycle begins with a balance of $314A payment of $314 is made. A purchase of $5 is made. A purchase of $12 is made. A purchase of $103 is made. The billing cycle ended.

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a

the answer is 1030 it's very simple math.

  or  

sin y = 7/q

7 is the opposite side length, q is the hypotenuse

tan y = 7/r

7 is the opposite side length, r is the adjacent side length

using sohcahtoa ^^^^

cos y = adjacent/hypotenuse

cos y = r/q