Answer:
x=0 or x=-4
Step-by-step explanation:
0=x²+4x
0=x(x+4)
x=0 or x=-4
An exterior angle is equal to the sum of the 2 non adjacent angles. In this case
100 = x + 70 Subtract 70
x = 100 - 70
x = 30
10% if it started with 30 than it ends with 40 10% must have been added
28 because a constant is a number that doesn't have x attached to it.hope this helps
