Answer:
x=60
Step-by-step explanation:
The three angles of a triangle add to 180 degrees
40+80+x = 180
Combine like terms
120+x =180
Subtract 120 from each side
120-120+x = 180-120
x = 60
5.95
an increase of 70% on to 100% = 170% - 1.7 multiply the price by 1.7 = 3.50 x 1.7 = 5.95 btw i am on 7 th grade too