Okay. So first you subtract 2x from each side. That will give you 4y= -2x+18 (you want to get y by itself). Then you divide both sides by 4. It should equal> y= 1/2x +9/2
X+30+70=180
x+100=180. -100 both sides
x=80
|x=80° |
Basically, the unit rate is 1.99/18 or 0.110.
If we round 1.99 to 2.00, we instead get 0.111~
Answer:
the opposite of what is in the parentheses so -(-6) would just be 6