math
posted by John on .
A brick wall is constructed with 20 rows of bricks. If the height of a brick is 3 7/8 inches and a mortar joint is approximately 5/8 inch, how heigh would the wall be? _______ inches
Does Anyone know how to do this one?

There are 20 rows of brick and 19 rows of mortar.
The total height would be:
20*(3 7/8)inches + 19*(5/8)inches
=?? 
70 1/2 ????

20*(3 7/8) + 19*(5/8)
=20*(31/8) + 19*(5/8)
=(620/8) + (95/8)
=715/8
=89 3/8 
a wall in front of a house is shown below. if 3/5 of the wall is made from brick, how do you determine the height of the brick portion of the wall. 7 3/4 height and width 15 1/5?