Answer:

Step-by-step explanation:






4 is the GCF.
Explanation:
4x3=12
4x5=20
5 Isn’t a factor of 12, and 6 isn’t a factor of 20. Each number above doesn’t work, so the greatest common factor of the numbers 12 and 20 must be 4.
Answer:
Slope: 2
y = 2x + 50
Step-by-Step Solution:
Slope: rise/run = 40/20 = 4/2 = 2
y = mx + b
m= slope = 2
b= y-intercept = 50
y = 2x + 50
All are easy. There is no way to say thatnone way is easier than the other. Well the answer lies in every individual, it depends on which method they are comfortable with. Anyway there are more method to solve quadratic than the listed ones.