Work out the perimeter of the triangle when the sides are : 3x-5 2x 19-x

Mathematics

2 answers:

Vedmedyk [2.9K]3 years ago

8 0

Answer:

The perimeter of the triangle is 4x+14

Step-by-step explanation:

Perimeter is sum of all sides.

So,

=> 3x-5+2x+19-x

=> 5x-x-5+19

=> 4x+14

So, The perimeter of the triangle is 4x+14

mr Goodwill [35]3 years ago

5 0

Answer:

4x + 14

Step-by-step explanation:

The perimeter of the triangle is equal to the sum of its three sides.

The sides of the triangle are 3x-5, 2x, and 19-x.

Calculate their sum.

3x - 5 + 2x + 19 - x

Rearrange.

3x + 2x - x + 19 - 5

Add or subtract like terms.

4x + 14

The perimeter of the triangle is 4x + 14.

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If 1 is added to the numerator and to the denominator of a fraction,the value obtained is 4/5.If 5 is subtracted from it's numer

Step2247 [10]

Let n and d represent the numerator and denominator of the fraction.
.. (n +1)/(d +1) = 4/5
.. (n -5)/(d -5) = 1/2
Eliminating fractions from these equations gives
.. 5(n +1) = 4(d +1)
.. 2(n -5) = (d -5)
Subtracting the first equation from 4 times the second gives
.. 4(2(n -5)) -(5(n +1)) = 4(d -5) -(4(d +1))
.. 8n -40 -5n -5 = 4d -20 -4d -4
.. 3n = 21
.. n = 7
.. 2(7 -5) = d -5
.. 9 = d

The fraction is 7/9.