A cab company charges a $4 boarding rate in addition to its meter which is $1.50 for every mile. Write a linear equation which models this. Use the equation to determine the total fare for a trip that is 2 miles, 3 miles and 5 miles.

2 miles = 7$

3 miles = 8.50$

5 miles = 11.50$

Step-by-step explanation:

1.50$ per mile + 4$ boarding fee

2 miles

1.50 × 2 + 4 = 7

3 miles

1.50 × 3 + 4 = 8.50

5 miles

1.50 × 5 + 4 = 11.50

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24