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2 years ago

Jonas wants to paint the walls of his bedroom and the ceiling. The dimensions of his room are 7 feet by 12 feet by 8 feet.

Mathematics

2 answers:

sleet_krkn [62]2 years ago

7 0

Answer:

The surface area that will be painted is 376 ft2.

o-na [289]2 years ago

3 0

The answer would be 376 ft2

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A rectangular piece of carpet covers 10 yd^2. The width is 4 yd less than the length. Find the length and width.

Cerrena [4.2K]

Answer:

length: 5.7 yd
width: 1.7 yd

Step-by-step explanation:

Let w represent the width of the carpet. Then the length is w+4 and the area is ...

w(w +4) = 10

w² +4w = 10 . . . . . eliminate parentheses

w² +4w +4 = 14 . . . . . . add the square of half the w-coefficient to complete the square

(w +2)² = 14 . . . . . . . . . rewrite as a square

w +2 = √14 . . . . . . . . . take the square root

2 = -2 +√14 ≈ 1.7 . . . . yards (width)

Then the length is 4 more yards than this, so is ...

length = 1.7 +4 = 5.7 . . . yards

The length and width are 5.7 and 1.7 yards, respectively.

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In the attached graph, we let x represent the length. As you can see, the magnitudes of the two zeros are width and length.

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3 years ago

What does the line in a scatter plot mean?

irakobra [83]

Answer:

the line represents the average slope in which the dots line up. in other words, it shows where most of the options/solutions are on the plot

Step-by-step explanation:

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2 years ago

A van is traveling 1.5 kilometers per minute. Approximately how fast is the van traveling in miles per hour?

Alik [6]

The van is traveling about 55.9 miles per hour.

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3 years ago

You are designing a rectangular pet pen for your new baby puppy. You have 35 feet of fence barrier. You decide that you would li

Zielflug [23.3K]

Hello from MrBillDoesMath!

Answer:

l = 12 feet, w = 5.5

Discussion:

Let w be the width of the pen and "l" the length. From the problem statement

l = w + 6.5 and the perimeter, P, of the fence -= 35.

Now the perimeter of the rectangle is given by the formula

P = 2l + 2w.

In our case, P = 35 and l = w + 6.5 so the equation becomes:

35 = 2(w+6.5) + 2w =>

35 = 2w + 13 + 2w =>

35 = 4w + 13 => (subtract 13 from both sides)

35-13 = 4w =>

22 = 4w =>

w = 22/4 = 5.5 feet

As, l = w + 6.5, l = 5.5 + 6.5 = 12 feet

Thank you,

MrB

3 0

3 years ago

Plz show work and solve quick please need help!!!!!

Simora [160]

Surface area is just the area of all these 4 triangles plus the rectangle.

First we can find the area of the rectangle.

$\sf A=lw$

Half of the length is 28 cm, so the full length must be 28 * 2 = 56 cm.

$\sf A=(56)(27)$

$\sf A=1512cm^2$

The base for the left and right triangles are 27. The heights would be the net length minus half the length of the rectangle:

$\sf 82.8-28=54.8\? cm$

Calculate the area:

$\sf A=\dfrac{1}{2}bh$

$\sf A=\dfrac{1}{2}(27)(54.8)$

$\sf A=739.8\?cm^2$

We have two of these triangles.

$\sf 739.8\times 2=1479.6\? cm^2$

Now do the other two pair of triangles. The bases for them are 28 + 28 = 56 cm. The heights would be the net width minus the width of the rectangle:

$\sf 81.2-27=54.2\?cm$

Now find the area:

$\sf A=\dfrac{1}{2}bh$

$\sf A=\dfrac{1}{2}(56)(54.2)$

$\sf A=1517.6\? cm^2$

We have two of these triangles.

$\sf 1517.6\times 2=3035.2\?cm^2$

Add all the areas together:

$\sf 1512+1479.6+3035.2=\boxed{\sf 6026.80\? cm^2}$

7 0

3 years ago