help please

[8dltndus]

I got them wrong and i don't know why i got them wrong and i don't quite understand how to solve this knid of problems
so here it is:
Mischa bought and energy-efficient washing machine. she will save about 15 gallons of water per wash load.
and the question is If mischa dsoes 2 loads of laundry per week, how many gallons of water will she have saved at the end of the year.
so what i did is that i multiplied 15 and 2 which is 30 so she saves about 30 gallons a week and what i don't get is how many weeks are in a month i did 5 and and multiplied, so i got 150 and that times 12 is 1800 and the answer says that it's 1560. so please tell me what i did wrong.

 

[Mrspi]

I got them wrong and i don't know why i got them wrong and i don't quite understand how to solve this knid of problems
so here it is:
Mischa bought and energy-efficient washing machine. she will save about 15 gallons of water per wash load.
and the question is If mischa dsoes 2 loads of laundry per week, how many gallons of water will she have saved at the end of the year.
so what i did is that i multiplied 15 and 2 which is 30 so she saves about 30 gallons a week and what i don't get is how many weeks are in a month i did 5 and and multiplied, so i got 150 and that times 12 is 1800 and the answer says that it's 1560. so please tell me what i did wrong.[/QUOTE

I think your error is in trying to work with MONTHS. You know she saves 30 gallons of water each week...how many weeks are in a year?

Multiply the number of weeks in a year by 30 gallons per week....you should come up with the same number that "the answer says."

 

[8dltndus]

thanks so much for your help!