Answer:
The answer is C. An octogon has a sum of interior angles of 1080 degrees. 1080/8 = 135 degrees.
Distribute 4 with x and 2 to get the equation 3x+2=x+4x+8. Combine x and 4x to get 5x. Minus 3x from each side. Now you should have 2=2x+8. Subtract 8 from both side to get -6=2x. Divide and you get x=-3
Answer:
x= 3
Step-by-step explanation:
4x+ 4 x= 12 + 12
8x = 24
x= 24/8
x= 3
1408 because you need to multiply it to get the perimeter
Answer:
Step-by-step explanation:
g(5)= (-5)^2 + 5(-2) - 4
25 - 10 - 4
15 - 4 = 11
f(11)= (11)^2 + 2(11) + 3
121 + 22 + 3
143 + 3 = 146