A polygon is regular when all angles are equal and all sides are equal (otherwise it is "irregular"). This is a regular pentagon (a 5-sided polygon)
The answer is C because the formula for slope is y=mx+b (Rise over run)
The x-intercept decreases and the y-intercept increases forming a negative slope. Hope this helped you :)
Let a checked bag = x
Since they are of the same weight
The two checked bags = x+x=2x
Another backpack that weighs 4kg
Total baggage =35
:- 2x + 4 = 35
2x = 35-4
2x = 31
The two checked bag weighs 31
Therefore the weight of one =15.5kg