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grin007 [14]
3 years ago
15

A rectangle has a perimeter of 60. Its length is 1/2(n-6) and its width is 2n+5. What is the value of n?

Mathematics
1 answer:
azamat3 years ago
4 0

Answer:

n must be 3

Step-by-step explanation:

The formula for the perimeter of a rectangle of length L and width W is

P = 2L + 2W.  Substituting (1/2)(n - 6) for L and 2n + 5 for W, we get:

P = 60 = n - 6 + 4n + 10, or:

      60 = 5n + 4, or:

       15 = 5n

Then n must be 3.

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12%of72 is what number
bazaltina [42]

Given:

A number 72.

To Find:

12% of 72.

Solution:

The given problem can be solved using the concepts of percentages and their applications.

1. The given number is 72.

2. x% of a number n is given by the formula,

=> x% of n = ,

3. x% of a number can also be defined as x parts of 100 multiplied by the given number.

4. 12% of 72 can be calculated using the above number,

=> 12% of 72 =

=> 0.12 x 72,

=> 864/100,

=> 8.64.

Therefore, 12% of 72 is 8.64

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EastWind [94]

Answer:

option b

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