Answer: subtraction property
x-(-6)=18
x+6=18
Subtract 6 from both sides
And you get x=12
Answer:
D
Step-by-step explanation:
If you are doing a simple version, it goes up by 2, then 4, then 6, then 8. So the next ones are 31, 43, 57
Answer:
m∠ABC = 68°
m∠DEF = 112°
Step-by-step explanation:
Supplementary angles are angles that add up to 180 degrees (they form a straight line).
If ∠ABC and ∠DEF are supplementary, that means that they add up to 180. We can write this in an equation:
- (6x + 8) + (12x - 8) = 180
Combine like terms.
Divide both sides by 18.
Find the measure of each angle by substituting 10 for x into both expressions for the angles.
m∠ABC = (6x + 8)°
m∠DEF = (12x - 8)°
