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Math word problem - Check my work please?

Can you check my quiz answers for errors?1Two fire hoses are being used to fight a fire. One hose delivers 5000 gallons in 20 minutes, while the other delivers 5000 gallons in 25 minutes. How many minutes will it take the two hoses together, to deliver 5000 gallons of water?x/20 + x/25 1 (5000 gal.)LCD100, multiply both sides to cancel, etc.5x + 4x 100 9x/9 100/9x 11 minutes 7 seconds (x 11.1)2It takes 3 hours for a mechanic to finish a job, but working with an assistant they can finish in 2.1 hours. How long would it take if the assistant works alone?2.1 / 3 + 2.1x 1multiply all by 3, denominator cancels, etc.2.1 + 6.3x 3-2.1 both sides6.3x / 6.3 0.9 / 6.3x 1/7 (1 job done / 7 hours)X 7 hours if assistant works alone

Answer:

wow thats gonna require some work. i would just buy them off OKorder. these lace locks are worth a good $20 on OKorder. sell yours and buy someones
2 words: Duck Tape (Duct?) I always call it duckit sounds cuter! :) I use it all the time for such things. Even my black slacks. When I have them hanging too long they get all dusty. That stuff works perfect. As the saying goes. I can fix anything! Where's the duck tape?

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