Find any points of discontinuity for the rational function. what are the points of discontinuity? are they all removable?
y = (x-7)(x-3) / x^2-10x+21
a. x = 1, x = –8, x = –2; yes
b. x = 7, x = 3; yes
c. x = –7, x = –3; no
d. x = –1, x = 8, x = 2; no

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. what distance from city a is the point where the truck and the car will meet?

Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?