# 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. 👍
2. 👎
3. 👁

## Similar Questions

1. ### Trigonometry

A ladder 5 meter long leans against the wall of an apartment house forming an angle of 50 degrees, 32 minutes with the ground. how high up the wall does it reach?

2. ### PHYSICS

1. A 15 kg child sits in a swing that is attached in ropes 1.6 m long . Find the potential energy of the child relative to his lower position when the ropes (a) are horizontal (b) vertical and (c) make 30° with the horizontal. 2.

3. ### 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

4. ### physics

A tennis ball (m= 0.2 kg) is thrown at a brick wall. It is traveling horizontally at 16 just before hitting the wall and rebounds from the wall at 8 , still traveling horizontally. The ball is in contact with the wall for 0.04 s.

1. ### Physics

Prairie dogs are burrowing rodents. They do not suffocate in their burrows, because the effect of air speed on pressure creates sufficient air circulation. The animals maintain a difference in the shapes of two entrances to the

2. ### english

Hey I have the write the sentences in passiv. But I do not really be good in passiv... can anybody check and may axplain what passiv is? The extent of the flood-damage has surprised everyone. -> Everyone was surprised by the

3. ### physics

In a friendly game of handball, you hit the ball essentially at ground level and send it toward the wall with a speed of 17 m/s at an angle of 39 ∘ above the horizontal. How long does it take for the ball to reach the wall if it

4. ### calculus

A brick becomes dislodged from the top of a state building (at a height of 1290 feet) and falls to the sidewalk below. (a) Write the position, velocity, and acceleration functions of the brick. s(t) = v(t) = a(t) = (b) How long

1. ### Finding Velocity

A brick falls freely from a high scaffold. A. What is its velocity after 4.0s? B. How far does the brick fall during the first 4.0s? I don't know what formula to use. I only have time, and I guess the first velocity would be 0s.

2. ### math

A wall in Marcus's bedroom is 8 2/5 feet high and 18 1/3 feet long. If he paints 1/2 of the wall blue

3. ### Physics

A brick is dropped from a high scaffold. (a) What is its velocity after 4.5 s? m/s (b) How far does the brick fall during this time?

4. ### math 1 question

Suppose you are building a brick border for a garden by stacking rows of bricks on top of each other. If the height of each brick is 2.5 inches and r represents the number of rows, which algebraic expression would represent the