Evaluate the expression 25 - k + v for k=20 and v=10

15

Step-by-step explanation:

Substitute the values so it becomes 25-20+10. 25-20=5, 5+10=15.

answer: a.   one is a factor of every whole number since every number is divisible by itself.

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.