Question

1. Lyft Rates Lyft charges customers a flat fee per ride (which is

Answer 1

The total price is

$4+0.2x+1.40y$

where x is the number of minutes and y is the number of miles.

We know that the number of minutes was three times the number of

miles, i.e. x=3y. This changes our expression into

$4+0.2\cdot 3y+1.40y=4+0.6y+1.40y=4+1.46y$

We also know that the total cost was 14, so we have

$14=4+1.46y\iff 1.46y=10 \iff y=\dfrac{10}{1.46}\approx 6.85$

And since the number of minutes was three times the number of miles, it is

$3\cdot 6.85=20.55$