The GCF of 28 and 16 is 4 since 28/4=7 and 16/4=4 and 7 and 4 are relatively prime. The gcd of a^3 and a is a. The gcd of b and b^2 is b. Thus, the gcd of the whole thing is 4ab so A is the answer.
Answer to the first question is A. X = 10 and y = -2. Plug it into the equation.
-2 + 2 = 3/5(10 - 10)
0 = 0
Answer to the second question is A. It is going up "rise" by 4. And left "run" by -5
Answer to the third question is A. 2x will represent the slope. 5 will represent the y intercept.
Answer to the fourth question is C.
Answer to the last question is B. y = 5(1) y = 5. y = 5(0) y = 0.
Hope that helps
