I cant see 5th question....
Rest are attched below
Answer:
90 or 85
Step-by-step explanation:
it is a right angle, and all the sides must add up to 180 degrees so yes, 85, im pretty sure.
I got b i did this question before but dont take my word for it im not one hundred percent sure
For this case we can raise a rule of three based on Anthony trotting
miles in 23 minutes.

miles -----------> 23 minutes
x ----------------------------------------> 1minute

ANswer:
0.5 miles per minute
The sum of polynomials involves adding the polynomials
The other polynomial is 
The sum of the polynomials is given as:

One of the polynomials is given as:

Represent the other polynomial with Q.
So, we have:

Substitute the expressions for P and Sum

Make Q the subject

Evaluate like terms

Hence, the other polynomial is 
Read more about polynomials at:
brainly.com/question/1487158