The height to length ratio of a brick wall is 3: 20. the wall is 40 feet long. how high is it

This is a ratio so we can simply set up a relation to find the unknown dimension...

If 3:20=h:l we can say:

3/20=h/l  and we are told l=40 so:

3/20=h/40  multiply both sides by 40

120/20=h  do indicated division

h=6 ft

So the wall is 6 feet high.

The great thing about this problem is they give you everything you need to solve it easily. so the expression is: 12h+30w12h+30wand so everywhere you have an “h” you place 66. and everywhere you have a “w” you place 33. then the expression will look like this: 12(66)+30(33)12(66)+30(33)from here you multiply and then add. getting the following of: $785,862hope this