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Sonja [21]
3 years ago
8

The length of a rectangle is twice its width.Find its area if its perimeter is 7 1/2cm

Mathematics
1 answer:
sp2606 [1]3 years ago
7 0
Let x equal the width
let 2x equal length

2x + 2x + x + x = 7.5
6x = 7.5
x = 1.25

width = 1.25
length = 2.5

(2.5)(1.25) = 3.125

3.125 = 3 1/8
area = 3 1/8
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Hitman42 [59]

Question:

At noon a tank contains 6 cm of water after several hours it contains 3 cm of water what is the percent decrease of water in the tank

Answer:

The percent Decrease of water in the tank  is 50%

Step-by-step explanation:

Given:

Initial amount of water in the tank at the noon = 6 cm

amount of water remained in water after several hours = 3 cm

To Find:

The percent decrease =?

Solution:

The percent decrease in the tank

=>\frac{\text {water present after some hours }}{\text {initial water contained in the tank }} \times 100

Substituting the values

=>\frac{3}{6} \times 100

=>\frac{1}{2} \times 100

=>\frac{100}{2}

=> 50

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3 years ago
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Nezavi [6.7K]

Answer:

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Step-by-step explanation:

Step 1: Add -16n to both sides.

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x2+28=−16n

Step 2: Add -28 to both sides.

x2+28+−28=−16n+−28

x2=−16n−28

Step 3: Take square root.

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65+40+x divided by 83
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