Answer:
Step-by-step explanation:
Percent: The percent is the number with the % symbol: 20%.
Base: The base is the whole amount, which in this case is unknown.
Amount: The amount based on the percent is 40
Base = unknown
Answer: 15
Step-by-step explanation:
Opposite angles of a cyclic quadrilateral are supplementary, so:

The answer is: 2a^4 - 3a^2 b - 5b^2
The perimeter of parallelogram WXYZ is 22
Answer: x = 156°
Step-by-step explanation:
So it is proven all triangles equal 180° and all straight angles are 180° so
85+71= 156
180-156=24°
but since you are trying to find x (to create the straight angle) and now know the other missing angle is 24°
180-24= 156
x=156°