level 2 algebra 2017 exam
QUESTION ONE
creating a picture from a picture never hurts!
Try playing around with this problem. Pretend the cost is $400 and say 6 students arrive lowering the cost per student by $10. Compare equations and answers. From above if three students leave, why is (x + 3) in the equation instead of (x - 3)? Try it and find out.
In part b, they talk about two equal roots which means 1 repeated root. I'm sure you wouldn't get that mixed up like I did with two real roots!
Correction for part (c) below, k > 2.68 and k < -2.68