LaTeX: P=R+C (solve for R)

How to solve a simultaneous equation involved with fractions?

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Abacteria population is tripling every hour. by what factor does the population change in 1/2 hour? select all that apply