Answer:
x=8
Step-by-step explanation:
7x-6+60+70=180°
7x-6+130=180°
7x+124=180°
7x=180-124
7x=56
x=56
___
7
x=8
ans
you can also see my copy
Basically if you have an exponent at the end of a 10,

, then in the end the extended notation is going to have 7 zeros. So it'll be 10000000. Then you multiply whats in the rest of the equation together. There's the beginning :) I hope it helps.
Answer:
C
Step-by-step explanation:
A) 10,000(1+.075)^1(5) = 14,356.29
b) i dont know sorry
5x² + 25x = 0
5x(x) + 5x(5) = 0
5x(x + 5) = 0
5 5
x(x + 5) = 0
x = 0 or x + 5 = 0
- 5 - 5
x = -5