8 yards converted into feet?

X-intercept=-5 y-intercept=2 the equation of the line is

1) prove that 731^3−631^3 is divisible by 100 2) prove that 99^3−74^3 is divisible by 25

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.