Answer:
OPTION C
Step-by-step explanation:
We know that the toll road is 4 times faster than the side streets.
If 'x' represents the number of minutes she usually spend taking the side streets. The represents the time she takes taking the toll road.
Also we need to create an equation to represent her total travel time, including wait time. Therefore, the equation is:
Therefore, the correct solution is the OPTION C.
Answer:
The value of x is reduced to one third when the value of y is tripled.
Step-by-step explanation:
Here, y varies inversely with x.
⇒
Here, k = Constant of Proportionality.
⇒ k = x y .......... (1)
Now, given y' = 3 y
to find the value of x'
Putting the value in
or, k = 3 y x '.......... (2)
From above statement (1) and (2)
⇒ xy = 3yx'
or, x ' = x/3
Hence, the value of x is reduced to one - third when the value of y is tripled.