Answer:
"...charges a flat rate of $5.00..." Flat rates in the business world is what we call constants in the mathematical word. That is, if we have a flat rate, that number doesn't change for anything because it has no variable attached to it (unless otherwise noted). You can identify what the constants are because they do not have the tags "per", "each", or "for every" attached to them when in the English language. In this case, this number remains the same no matter if 1 package gets shipped or a 1000 packages get shipped. So, we have the first part of our equation:
$5.00...
Step-by-step explanation:
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Answer:
The answers are in the question.
Step-by-step explanation:
The wording can be off-putting but the answers are mostly there for you. It says that when the wind was at the tail of the plane, the travel was hastened to 5 hours instead of six. Is the rate of speed with the wind in favor of the plane is r+21, then it stands to reason that traveling AGAINST the wind will cause the rate to drop to r-21. Taking the average of the two travel times (5 and 6 hours each), we get 5.5 hours. Since speed is distance divided by time, the speed of the plane in still air will be <em>d</em> / 5.5
Be sure to label the speed as mph.