The cost c of producing x number of calculators is given by c= 4.50x + 3000 and the revenue r from selling is 16.50x. find the number of calculators that must be sold to break even

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

Which graph depicts the path of a projectile

Dots sells a total of 279 t-shirts ($2) and shorts ($4). in april total sales were $670. how many t-shirts and shorts did dots sell?