This is what I got, hope it helps (I used a calculator for this on Google)
Expanded Notation Form:
5
Expanded Factors Form:
5 ×
1
Expanded Exponential Form:
5 × 100
Answer:
B
Step-by-step explanation:
A rhombus is divided into four congruent triangles. The two given angles are complementary, meaning they add up to 90 degrees. Set up an equation:

Take out the parentheses
Combine like terms
Add 25 to both sides so as to isolate the variable
Divide both sides by 5
It only equals positive 12, that symbol means it equals positive and negative 12