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katrin2010 [14]
3 years ago
7

the length of a rectangular sing is 4 time its width. if the sign perimeter is 20 inches. what is the sign area ?

Mathematics
1 answer:
Hitman42 [59]3 years ago
8 0

Answer:

Area = 16 in²

Step-by-step explanation:

Represent the length with L and the width with W

We have the following given parameters:

L = 4W

Perimeter = 20

Required

Determine the area.

The perimeter is calculated as thus:

Perimeter = 2(L + W)

Substitute 4W for L and 20 for Perimeter.

20 = 2(4W + W)

20 = 2 * 5W

20 = 10W

Solve for W

W = 20/10

W = 2

Recall that:

L = 4W

L = 4 * 2

L = 8

The area is then calculated as thus:

Area = L * W

Area = 8 * 2

Area = 16

Hence, the area is 16in²

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Perform the indicated operation. (-18)/-(4)
Illusion [34]
A negative divided by a negative is always a positive. 4 can go into 18 only 4 times to get 16 with a remainder of 2. 2 is half of four, therefore -4 can go into -18 4.5 times. 
The answer is 4 1/2 or 4.5.
I hope this helps ^-^
7 0
3 years ago
What is the sum of 1/4+1/10
IgorLugansk [536]

Answer:

simplify: 14/40

not simplify: 7/20

I don't know if it's right but i'm trying to help :)

5 0
3 years ago
Each side of a square is (7 + 3x) units. Which is the perimeter of the square?
erastovalidia [21]

Answer:

49 + 9x units

Step-by-step explanation:

perimeter is sum of all the sides

4 0
2 years ago
Please can someone show me how to work this out step by step without a calculator
Artyom0805 [142]
2\sqrt8\times8\sqrt2=(2\times8)\sqrt{8\times2}=16\sqrt{16}=16\times4=64

Alternatively, you can write radicals as rational exponents, so that you get

2\sqrt8\times8\sqrt2=2\tiems8^{1/2}\times8\times2^{1/2}=2^{3/2}8^{3/2}

Then recalling that 2^3=8, you have

2^{3/2}8^{3/2}=2^{3/2}(2^3)^{3/2}=2^{3/2}2^{9/2}=2^{12/2}=2^6=64
5 0
4 years ago
Given the following pyramid identify the L, P, and B then find the surface area
Liula [17]

Answer:

slant length (l) = 7.5 m

perimeter of base P = 40 m

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Surface Area = 250 m^2

Step-by-step explanation:

Surface area of a pyramid formula

1/2Pl + B

1/2 (40)(7.5) + 100

150 + 100 = 250 square meters

6 0
2 years ago
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