Question about Office Equipment & Supplies
Suppose the length of time taken is T and the wind speed is W. Also we will assume that the ground speed of the plane is exactly its top speed plus or minus the wind speed, with no losses anywhere. So
(180 - W) * T = 100
(180 + W) * T = 135
180T - WT = 100
180T +WT = 135
Add these 2 equations together
360T = 235 so T = 0.653 hrs or 39.17 min
Now subtract equation 1 from equation 2
2WT = 35 This is the equation you ask for in your question
W = 35 / 2 / 0.653 or 26.8 mph
(180 - 26.8) * 0.653 = 100 OK
Posted on Nov 13, 2014
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Posted on Jan 02, 2017
SOURCE: ACME Skateboards Inc., has paid
Doesn't any body do their homework anymore? How are they supposed to learn anything?
Draw your graphs by hand or on a graphing calculator.
Think about the intersection points. (What does that mean when two curves intersect?)
Use the equation for the demand to obtain D for a particular x.
You can also determine by how much one function exceeds another for a particular value of the x variable (the graph is rather clear).
I assume you can solve a quadratic equation.
Use these hints to solve the problem.
Here is a graph. I even restricted it to the first quadrant so as not to mislead you into giving meaningless answers.
Hope it helps.
Posted on Oct 04, 2009
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