If all Y values are unique, then it is a function. Y values cannot repeat if it's a function. Hope this helps (:
The value of t is:
a) when v = 15 then t = 3 hours
b) when v = 18 then t = 2.52 hours
<h3><u>Solution:</u></h3>
The relation between speed and time taken is given as:
It is given that for first 30 km, the speed of bicyclist is v km/hour
<em><u>
Time taken to cover first 30 km is given by:</u></em>
For next 17 km the speed of bicyclist is 2 km/hour greater than his original speed
so the speed to cover next 17 km = v + 2
<em><u>
Time taken to cover next 17 km is given by:</u></em>
Now total time t spent by the bicyclist to cover entire trip is given by
---- eqn 1
We have to find value of "t" for a) v = 15 and b) v = 18
<u><em>a) value of t when v = 15</em></u>
Substitute v = 15 in eqn 1
t = 2 + 1 = 3
So t = 3 hours
<u><em>b) value of t when v = 18</em></u>
Thus t = 2.52 hours
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Hope it Helps! :)
Tell me if I'm right.
Answer:
Step-by-step explanation:
4a^2 + 4ab - 2ab - 2b^2
4a^2 + 2ab - 2b^2