1^81, 9^2, 3^4. the others are rather to high or to low
Answer:
x=-1 and x=5
Step-by-step explanation:
we have

Solve it by completing the square method
We take the coefficient of x that is -4, divide it by 2 and then square it
so

square it

Adds 4 both sides

Combine like terms right side

Rewrite as perfect squares

take square root both sides


therefore


Answer:
C, 40
Step-by-step explanation:
You can set up the equation as 20+4x=180
180 is the total angle of the line
4x=160 and divide each side by 4
x=40
Answer:
yes because of a postulate or a theorem
Step-by-step explanation: