Two snowblowers are being used to clear a driveway. The first blower can remove 60 cubic feet per minute and the second blower can remove 40 cubic feet per minute.

a. write and simplify an expression that gives the number of cubic feet of snow removed in x minutes.

The first snow bar can remove 60x cubic feer in x minutes.

The second  snow bar can remove 40x cubic feer in x minutes.

So total cubic feets removed =60x+40x=100x.

b. find the total number of cubic feet of snow removed in 38 minutes.

=100*38.

3800 cubic feet.