Answer:
23.2
Step-by-step explanation:
15.7 - (-7.5) = 15.7 + 7.5 (because if there's 2 negative sign it makes the number positive)
15.7 + 7.5 = 23.2
4x² + 11x - 3 = 0
(4x-1)(x+3) = 0
x = 1/4, -3
That x is any number bigger that 5 so 6 plus
c