its the day befofe valentines day and shelly needs to get valentine cards for all of her classmates the desks are arranged in a rectangle 7 rows wide and 5 rows long if there are 3 desks that are empty how many students are in the class

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee, f, for a single job is a function of the number, t, of hours it takes him to complete the job. write the function's formula.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup