Answer:
[tex]\frac{3xr}{200}[/tex]
Step-by-step explanation:
A certain NYC taxi driver has decided to start charging a rate of r cents per person per mile
rate is cents . convert it in to dollars
1 cent = 1/100 dollars
r cents = r/100 dollars
Each people travels x miles
cost is [tex]\frac{r}{100} \cdot x[/tex]
For 3 people the cost is
[tex]3\frac{r}{100} \cdot x[/tex]
Discount is 50%, so we divide by 2
[tex]\frac{3\frac{r}{100} \cdot x}{2} =\frac{3xr}{200}[/tex]
