What is the value of the rational expression below when x is equal to 3? 15-x/9-x

A. 5/3
B. 2
C. 3/2
D. -2

Which two organisms in the food web would most likely be affected by a decrease in producers, or the plants, at the bottom base of the food web?

Julian and morgan obtain a 30-year 4/1 arm at 3.9% with a 3/13 cap structure in the amount of $182,345.? what is the remaining balance on the mortgage after the first four years? $141,062.12 $168,476.64 $172,148.77 $173,946.01

Let r(t) represent the rate, in square feet per minute, at which a groundskeeper is mowing a lawn t minutes after 3 p.m. what expression represents the area, in square feet, of the lawn that is mowed between 3 p.m. and 5 p.m.?