7+9=16 you can use that cause that is the opposite equation
the answer is b because the answer for both of them is -39. you might also want to look into the sign rules in algebra bb :)
Answer:
x = 60°
General Formulas and Concepts:
<u>Pre-Algebra</u>
- Order of Operations: BPEMDAS
- Equality Properties
<u>Geometry</u>
- A box on an angle signifies a 90° angle
- All angles in a triangle add up to 180°
Step-by-step explanation:
<u>Step 1: Set up equation</u>
x° + 90° + 30° = 180°
<u>Step 2: Solve for </u><em><u>x</u></em>
- Combine like terms: x + 120 = 180
- Subtract 120 on both sides: x = 60°
Answer:

Step-by-step explanation:
Solve absolute value.


12 is greater than 8. Use greater than symbol.
