Thelma and Laura start a lawn-mowing business and buy a lawnmower for $225. They plan to charge $15 to mow one lawn. What is the minimum number of lawns they need to mow if they wish to earn a profit of at least $750?

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Answer 1 · 2017-07-20T19:38:29

I got #65#

The profit will be given as:

#P=$15x-$225#

(where we subtracted the cost of the mower) so that #P=$750#.

#x# will be the required number of needed lawns.

We need to solve:

#$750=$15x-$225#

rearranging:

#x=($750+$225)/($15)=65# lawns