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2 years ago

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the length of a rectangle is 2 more than the width and the perimeter is 80. find the dimensions of the rectangle

2 answers:

4vir4ik [10]2 years ago

5 0

Let width = x then
2x+ 2(x + 2) = 80
4x + 4 = 80
4x = 76
x = 19

so the width is 19 and the length is 21 answer

Rashid [163]2 years ago

5 0

Let L represent the length of the rectangle
let W represent the width of the rectangle
the length is 2 more than the width
L = 2 + W
Let the Perimeter = P
P = 2(L + W)
substitute L = 2 + W, and P =80 in the Formula above
80 = 2( 2 + W + W)
80 = 2(2 + 2W)
80 = 4 + 4W
4W = 80 - 4
4W = 76
W = 19
L = 2 + W
L = 2 + 19
L = 21
the width is 19
the length is 21
pls mark me as brainliest

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grigory [225]

<h3>Answer: x = 7</h3>

Explanation:

Segment addition postulate

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CD = 9

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1 year ago

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Andreas93 [3]

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2 years ago

A man 6 feet tall casts a shadow that is 11 feet long. A building casts a shadow of 139 feet long. The building is tall. Round y

dmitriy555 [2]

Given:

Height of man = 6 ft

Height of man's shadow = 11 feet

Height of building's shadow = 139 feet

To find:

The height of the building.

Solution:

We know that the heights of the objects and there shadows are always proportional.

$\dfrac{\text{Height of man}}{\text{Height of man's shadow}}=\dfrac{\text{Height of the building}}{\text{Height of building's shadow}}$

Let x be the height of the building.

$\dfrac{6}{11}=\dfrac{x}{139}$

Multiply both sides by 139.

$\dfrac{6}{11}\times 139=x$

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2 years ago

siniylev [52]

Answer:

Slant height (s)= 12.1 cm

Step-by-step explanation:

Given: Base= 4.5 cm.

Surface area of right square pyramid= 129.5 cm.

First, calculating slant height (s) of right square pyramid.

Surface area of square pyramid= $(a^{2} +2\times a\times s)$

a= side of square base.

s= slant height

∴ $129.5= (4.5^{2} + 2\times 4.5\times s)$

⇒ $129.5= (20.25+2\times 4.5\times s)$

⇒ $129.5= (20.25+9\times s)$

Now, opening the parenthesis and subtracting both side by 20.25.

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cross multiplying both side

∴ Slant height (s)= 12.1

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3 years ago