Help creating equation for word prob: "Mike can plow field in 12 hrs; Phil in 15 hrs"
Hi, my daughter is in 7th grade and starting Algebra 1, she got the first assignment and asked for my help but it has been so long I'm kinda lost. The exercises ask to create an equation and solve, I need help with the equation part.
This is the word problem:
"Mike can plow a field in 12 hours and his brother Phil can plow it in 15 hours. How long will it take them to plow it if they use 2 plows and work together?"
...and here is another one but I think is the opposite:
"Mary can make a costume twice as fast as Sam can. if they both work together they can make it in 6 hours. how long will it take Mary to make the costume if she works alone?"
Thanks very much for your help!
Erik
Hi, my daughter is in 7th grade and starting Algebra 1, she got the first assignment and asked for my help but it has been so long I'm kinda lost. The exercises ask to create an equation and solve, I need help with the equation part.
This is the word problem:
"Mike can plow a field in 12 hours and his brother Phil can plow it in 15 hours. How long will it take them to plow it if they use 2 plows and work together?"
...and here is another one but I think is the opposite:
"Mary can make a costume twice as fast as Sam can. if they both work together they can make it in 6 hours. how long will it take Mary to make the costume if she works alone?"
Thanks very much for your help!
Erik