Here the given expression is

We need to find the value of y when x =3 . So we substitute the value of x in the given expression.

So when x=3, y=0.4 and that's the required answer.
Answer:
Step-by-step explanation:
2b + 2c
It is biggest to smallest I presume
1/2 hour = 105 miles
Divide by 1/2 on both sides :
1/4 hour = 52.5 miles