Find the least common denominator for the following rational expressions.
18/r- 4, -5r/r^-5r+4, r+7/r^-4r-5
o (1-1)(r – 4)(r-5)
o (r - 1)(r + 4)(r-5)
0 (-1)(r+ 1)(r-4)(r-5)
(r- 1)(r+ 1)(r + 4)(-5)

On the first of each month sasha runs a 5k race she keeps track of her times to track her progress her time in minutes is recorded in the table

Three consecutive integers have a sum of 234. what are the three integers

To find the inverse of a number a, one can use the equation f(c) = a-1/c=0 where c is the inverse of a use the secant method of finding roots of equations to find the inverse of a = 2.5 ,er = 0.001%