I’m pretty sure the answer is b but not 100%
10:18P.M ...............................
I'm not doing your work for you figure it out
The middle number is 16.95
<h3>What is Number system?</h3>
The collection of numbers is called the number system. These numbers are of different types such as natural numbers, whole numbers, integers, rational numbers and irrational numbers.
Given:
Numbers are 12.7 and 21.2
Difference between number
= 21.2-12.7
=8.5
middle number
= 12.7+ 8.5/2
= 12.7+ 4.25
= 16.95
Hence, the middle number is 16.95.
Learn more about this middle number here:
brainly.com/question/17721191
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-19x-11 should be the answer... if the 19 and x aren’t combined then the answer is x-30