Answer is 4 - x^2 = -16 so the answer is -8 for x.
Answer:
Actually i don't know what is the wanted but now
i will find the total of the teenagers.
Step-by-step explanation:

I hope that is useful for you :)
Answer:
or 
Step-by-step explanation:
we have

step 1
Group terms that contain the same variable

step 2
Combine like terms

step 3
Eliminate parenthesis

step 4
Factor the number 

18 / 25 = 0.72 per marker
Answer:
x = 20°
Step-by-step explanation:
So when I learned it we called it the exterior angle theorem not the angle sum theorem but here goes.
Since exterior angle = 110 Degrees,
--> The Inner 2 angles's sum = 110 Degrees
so, 70 + 2x = 110
=> 2x = 40
x = 20
x = 20°
<u>Hope this helps!</u>