Suppose that the height (in centimeters) of a candle is a linear function of
the amount of time (in hours) it has been burning.
Let x be the amount of time in hours
Let y be the heoght of a candle in centimeters
The two points are then as (9,24.5) and (23,17.5).














Now plug in x=21, we get

Thus the height of the candle after 21 hours is 18.5 centimeters.
Answer:
B
Step-by-step explanation:
Trapezoids have only one pair of parallel lines.
Answer:

Step-by-step explanation:
In order to find the answer, you first need to convert the mixed number (2 1/3) into a improper fraction and then multiply.







Hope this helps.