Answer:
29 homework problems
Addition Property was used
Step-by-step explanation:
15+5=20+9=29
Addition
Answer:
201.25 (im not 100% sure)
Step-by-step explanation:
If its correct please mark me as brainliest
Answer: 
Step-by-step explanation:
The missing figure is attached.
For this exercise it is important to remember that, by definition, the opposite interior angles of an inscribed quadrilateral are supplementary, which means that their sum is 180 degrees.
Based on this, you can identify that the angle D and the angle B are opposite and, therefore, supplementary.
Knowing that, you can write the following equation:

Now you must solve for "x" in order to find its value. This is:

Then:

You know that:

Therefore, since you know the value of "x", you can substitute it into
and then you must evaluate, in order to find the measure of the angle A. This is:

Answer:
Step-by-step explanation:
we have

we know that
The sum of a quadratic equation and a linear equation will be a quadratic equation
so
Combine like terms
