# area of squares and rectangles

a brick wall is 42'-4'' long and 18'-7''high.there are 2 openings each 3'-2'' X 7'-2''.what is the net are of the wall to the nearer thousandth sq foot?

convert the measurements to decimal..

42'4'= 42 4/12 = 42.3333 ft as an example.

Now compute the areas, subtracting the area of the windows from the wall.

I will be happy to critique your work or thinking

(42X12+2)X(18X12+2)=508X223=113284
(3X12+2)X(7X12+2)=38X86=3268
113284-3268=110016/144=764 sq ft

You calculations are not corect.
(42x12 + 2) = 506
(18x12 + 2) = 218
Take it from there. Within parentheses, multiplication and division are done before addition and subtraction.

The other two are correct. However, the correctness of the third problem depends on the original units used — feet or square feet. Was this from a word problem?

I hope this helps. Thanks for asking.

a brick wall is 42'-4'' long and 18'-7''high.there are 2 openings each 3'-2'' X 7'-2''.what is the net are of the wall to the nearer thousandth sq foot?
(42X12+2)X(18X12+2)=508X223=113284
(3X12+2)X(7X12+2)=38X86=3268
113284-3268=110016/144=764 sq ft>>

In inches, 42'4" is 42x12 +4=508
18'7" is 18x12+7=223
so the first line result is correct (notice your typos in the calcs).
The second line is correct.
The result is correct, except for the decimal. The problem asked for net sq ft to nearest thousandth.....

no

1. 👍 0
2. 👎 0
3. 👁 132

## Similar Questions

1. ### Math

If 600 bricks measuring 12" by 18" are required to build a wall 10 ft. high (one brick thick), how long is the wall?

asked by Bria S. on June 17, 2013
2. ### math

You plan to construct a brick wall measuring 14.5 ft. in length, 5.5 ft. high, and 0.5 ft. in width. If a brick measures 6 in. x 4 in. x 2 in., how many bricks will you need? (Remember to round up.)

asked by Anonymous on January 6, 2015
3. ### Math

a wall in front of a house is shown below if 3/5 of the wall is brick how do you determine the height of the brick portion of the wall

asked by Anonymous on April 4, 2014
4. ### calculus

A landscape architect wishes to enclose a rectangular garden on one side by a brick wall costing \$30/ft and on the other three sides by a metal fence costing \$20/ft. If the area of the garden is 2,000 ft2, find the dimensions of

asked by Anonymous on October 26, 2010
5. ### Math

Grace is building a brick wall along her driveway. She estimates that one row of brinks plus mortar will be 2 3/8 inches high. How many rows will she need to construct a wall that is 57 inches high?

asked by Susie on June 25, 2013
1. ### Math

You plan to construct a brick wall measuring 4.5 m in length, 1.2 m high, and 0.5 m in width. If a brick measures 20 cm x 9 cm x 5 cm, how many bricks will you need? Total volume (to the nearest tenth) = ________ cubic meters. The

asked by Leo on June 14, 2012
2. ### Math--

A brick layer is hired to build three walls of equal length. He has bricks which are 9 inches, 27 inches, and 21 inches long. He plans to build one wall out of each type of brick. What is the shortest length of wall possible? A)

asked by Annonom on May 19, 2010
3. ### 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?

asked by John on February 17, 2008
4. ### Basic Geometry

Someone help me check my answers Dakota built a wall with bricks like this one: A=5 B=8 Look at Dakotaâ€™s wall: What is the length of the side of the brick labeled a? ____5__ inches______ What is the length of the side of

asked by Anonymous on April 14, 2017
5. ### Physics

A 3.0 kg brick rests on a perfectly smooth ramp inclined at 34 above the horizontal. The brick is kept from sliding down the plane by an ideal spring that is aligned with the surface and attached to a wall above the brick. The

asked by Anonymous on October 28, 2014

More Similar Questions