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3 years ago

Can someone help me please!!

Mathematics

2 answers:

nignag [31]3 years ago

6 0

Answer:

The Answer is c.

Step-by-step explanation: I hope this helps :D

castortr0y [4]3 years ago

3 0

Answer:

trapezium that is the answet

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You have decided to wallpaper your rectangular bedroom. the dimensions are 12 feet 6 inches by 10 feet 6 inches by 8 feet 0 inch

Papessa [141]

The wall area is the product of the room perimeter and the room height:
A₁ = (2*(12.5 ft + 10.5 ft))*(8.0 ft) = 368 ft²

The window and door area together is
A₂ = 2*((4 ft)*(3 ft)) + (7 ft)*(3 ft) = 45 ft²

The area of one roll of wallpaper is
A₃ = (2.5 ft)*(30 ft) = 75 ft²

Then the number of rolls of wallpaper required will be
1.1*(A₁ - A₂)/A₃ ≈ 4.74

5 rolls of wallpaper should be purchased.

_____
As a practical matter, not much of the window and door area can be saved. The rolls are 30 inches wide, but the openings are 36 inches wide. Some will likely have to be cut from two strips. The strips will have to be the full length of the wall, and the amount cut likely cannot be used elsewhere. If the window and door area cannot be salvaged, then likely ceiling(5.4) = 6 rolls will be needed (still allowing 10% for matching and waste).

8 0

3 years ago

Check thepic plzz first answer brainliest

aleksandr82 [10.1K]

Answer:

Total Surface Area: A = 88 square cm

Step-by-step explanation:

Volume V = 48 cubic cm

So this cuboidal box is actually a rectangular prism.

V = L * W* H

L = length, W = breadth, H= height

With L: W : H = 3: 2: 1

L:W = 3: 2

W: H = 2: 1

L/W = 3/2, L = (3/2)*W

W/H = 2/1 , W = 2*H

L = (3/2)*(2H) = 3H

So : V = L * W * H = (3H) * (2H) * H = 6 * H^3

48 = 6 * H^3

48/6 = 8 = H^3

H = cube-root(8) = 2 cm

so ...

W = 2*H = 2*2 = 4 cm

L = (3/2)*W = (3/2)* 4 = 6 cm

Total Surface Area: A = 2*LW + 2*LH + 2*WH

A = 2*(6 * 4) + 2*(6 * 2) + 2*(4 * 2)

A = 2*24 + 2*12 + 2*8

A = 48 + 24 + 16

A = 48 + 40

A = 88 square cm

4 0

3 years ago

Someone please help:(! I’m taking a 300 question quiz for my act prep course. ASAP.

gregori [183]

It’s the difference between the y values divided by two and subtracted from the bigger one. And the same thing for x values. U are kinda finding the second one

6 0

2 years ago

A rectangular piece of paper has a width that is 3 inches less than its length. It is cut in half along a diagonal to create two

Oliga [24]

Let

x-------> the length of the rectangle

y------> the width of the rectangle

we know that

The area of the rectangle is equal to

$A=x*y$