In scientific notation , 8,599,000,000=8.599.*10^z what is the value of x

If the value of x increases by 5, how does the value of m(x + 3) change? a) it increases by 5m. b) it increases by 8m. c) it decreases by 5m. d) it decreases by 8m.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Ineed with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x