math

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?

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1. 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
=??

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2. 70 1/2 ????

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posted by John
3. 20*(3 7/8) + 19*(5/8)
=20*(31/8) + 19*(5/8)
=(620/8) + (95/8)
=715/8
=89 3/8

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4. 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?

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posted by George

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