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horrorfan [7]
3 years ago
13

The numerator of a rational number is less that it’s denominator by 7.If the new number becomes 3/2 when the numerator is triple

d and the denominator is increased by 16, find the original number
Pls help me with this question
Mathematics
1 answer:
Murljashka [212]3 years ago
3 0

Answer:

\frac{23}{30}

Step-by-step explanation:

let the denominator of the original fraction be x, then

\frac{x-7}{x} ← is the original fraction

After the given changes, that is

\frac{3(x-7)}{x+16} = \frac{3}{2} ( cross- multiply )

6(x - 7) = 3(x + 16) ← distribute parenthesis on both sides

6x - 42 = 3x + 48 ( subtract 3x from both sides )

3x - 42 = 48 ( add 42 to both sides )

3x = 90 ( divide both sides by 3 )

x = 30

Thus

\frac{30-7}{30} = \frac{23}{30} ← the original rational number

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8 0
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Answer:

Sum angle of triangle BHD = 180°

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3 years ago
Prove the statement holds for all positive integers:<br><br> 2 + 4 + 6 + ... + 2n = n² + n
crimeas [40]

Proving a relation for all natural numbers involves proving it for n = 1 and showing that it holds for n + 1 if it is assumed that it is true for any n.

The relation 2+4+6+...+2n = n^2+n has to be proved.

If n = 1, the right hand side is equal to 2*1 = 2 and the left hand side is equal to 1^1 + 1 = 1 + 1 = 2

Assume that the relation holds for any value of n.

2 + 4 + 6 + ... + 2n + 2(n+1) = n^2 + n + 2(n + 1)

= n^2 + n + 2n + 2

= n^2 + 2n + 1 + n + 1

= (n + 1)^2 + (n + 1)

This shows that the given relation is true for n = 1 and if it is assumed to be true for n it is also true for n + 1.

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6 0
3 years ago
Which represents the value of What is the length of line segment DG?
Natalka [10]

<u>Answer</u>

12 units


<u>Explanation</u>

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= 12 units

5 0
4 years ago
Read 2 more answers
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