Each student at state college has a student id number consisting of four digits followed by three of the letters a, b, c, d, and e(letters may not be repeated). how many different student numbers are possible?

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

Johnny rode his bike to a friends house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was unable to play. what was his displacement for the total bike ride trip? what could you use as a reference point ? show the steps to solve this problem.

Write the factored form of this trinomial 9x^2+18x-7