By definition we have to:
In mathematics, an irrational number is a number that can not be expressed as a fraction m / n, where m and n are integers and n is different from zero.
For example, the number π is an irrational number.

We must find an irrational number between 5 and 7.
We then have the following number:

Answer:
An irrational number between 5 and 7 is:

Answer:
B
Step-by-step explanation:
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The value of n in the mathematical statement is 0.64
<h3>How to solve the equation?</h3>
The statement is given as:
n multiplied by -5/8 equals -0.4
Rewrite properly as:
n * -5/8 = -0.4
Multiply both sides by -1
n * 5/8 = 0.4
Multiply both sides by 8/5
n = 0.64
Hence, the value of n in the mathematical statement is 0.64
Read more about mathematical statements at:
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area = sum of parallel sides . height/2
= (5.9 + 16.3) 4.6/2
= 22.2 . 2.3
= 51.06 m²
so the answer is A