Helpp me please (No Links Or Files For Explanations Or Solutions)

Thank you very much in advance for whom will help and for whom will answer my questions correctly.​
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15 B

16 B

17 A

Step-by-step explanation:

A triangle is a figure with three sides.

Which can be re-written in the if-then form as If  the figure is a triangle then it has three sides.

The elevator has a MAX capacity of 8 people. This means that only 8 or less people can be on the elevator at a time. If c = # of people then c must be less than or equal to 8 as the elevator has a max capacity of 8 people. Hence the mathematical statement would be c ≤ 8

When the inequality sign is facing the "y" the solutions to the set can be found above the line. This could also be checked by graphing.  

both equations and proportions are better.

answer: i don't understand it

step-by-step explanation: sorry