Answer:
I remember doing this but I forget how I´m sorry
Step-by-step explanation:
Question 1:
For this case we have that by definition, the GCF of two numbers is the largest number that is a factor of both numbers. For example, the number 10 is the biggest factor that 50 and 30 have in common.
We must find the GCF of the following expression:

We look for the prime factorization of each number:

The GCF of the three numbers is 
So:

Answer:
Option C
Question 2:
For this case we have that by definition of power properties of the same base, that:

That is, for multiplication of powers of the same base, the same base is placed and the exponents are added.
So:

ANswer:

Option A
Answer:
-x^7
Step-by-step explanation:
Answer:
Answer: Expression that represents the length of one side of the square is x - 5.
The answer is A. 4
in this equation you use pythagoreans theorem
x^2-8^2=9^2
x^2-64=81
81-64=17
square x^2 square 17
x=4.12 rounded to 4