1.definition of parallel lines
2.angles of congruency
3. supplementary lines are congruent
I was only able to figure out the first 3, but I hope this helped a little bit :)
21/x greater than or equal to 4. I think
Greatest Common Factor of 12,18,84.
Factors of 12:1,2,3,4,6,12
Factors of 18:1,2,3,6,9,18
Factors of 84:1,2,3,4,6,7, 12,14,21,28 42,84
The Greatest Common Factor (GCF) of all those three factors is 6.
The Greatest Common Factor is the greatest Factor in all the numbers. In this set, 12,84,84, 6 is the greatest, making it the Greatest Common Factor.
Step-by-step explanation:
It is given that,
The length of section 1 is 0.75 m and the length of section 2 is 15/100 m. The total length of the section is equal to the sum of section 1 and section 2. So, we will add them as follows :

So, the length of the section is 0.9 m or 9/10 m
"Five times the sum of three, J, and two times J."
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Why would you want to? The math expression is much more concise and less likely to be misinterpreted.