Answer:
4
Step-by-step explanation:
When you add a positive number with a negative number, it technically turns into a subtraction equation. So, the easier way to look at the equation is 8-4=4
Answer:
x = 20
Step-by-step explanation:
You can use Pythagorean theorem which is 
a = 12
b = 16
and c would be x.
12^2 + 16^2 = c^2
144 + 256 = c^2
400 = c^2
square root
c = 20 or x = 20
30 degrees as it is opposite to it
Answer:
B hopefully this helps you with work
Answer:
4,5,6
Step-by-step explanation:
(x)+(x+1)+(x+2)= 15
3x + 3 = 15
3x = 12
x = 4
