Help with algebra homework?

Posted on 2015-10-06 06:20:00 in Math by JACK

Ok so I know i need to do my hw myself but i genuinely don t understand 2 of the word problems on my hw and i understand to some people thia may be common sense but to me it is not and im bot asking for criticism just help so that i can better understand it.

1.) Jack can do a certain job in 20 minutes less time than Allen can do the same job. One day Jack starts the job but stops after 10 minutes due to an injury. Allen steps in and finishes the job after working for 15 minutes. How long can Jack do this job by himself if he were not injured? Show the equation for this situation and solve it. Round answer to the nearest tenth of a minute.

2.) A retailer bought a number of special cups for $48. She decided to keep two of the cups for herself and sell each of the remaining cups for $3 more than the original cost per cup. If she sells the remaining cups for $70, how many cups did she buy and at what price per cup did she sell? Show the equation for this situation and show the work to solve.

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