Kelly took a quiz on decimals that had 151515 questions. she got \dfrac45
5
4
start fraction, 4, divided by, 5, end fraction of those questions correct.
she took another quiz on fractions that had 121212 questions. she got \dfrac56
6
5
start fraction, 5, divided by, 6, end fraction of those questions correct.

555 divided by 1/4 is 2220

step-by-step explanation:

points a and b are equidistant from the desired line, so the line you find by using them will go through point r.

using points other than a and b will give the desired line only if they are equidistant from r. if they are randomly located, the perpendicular line you create will not necessarily go through point r, hence will not be a solution to the problem.

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)