You have $20 to spend on taxi fare. The ride costs $5, 5 plus $2.50 per kilometer.
Write an inequality to determine the distance in kilometers, d, you can ride for $20

d = 6 km

Step-by-step explanation:

The total cost of a ride includes a fixed, up-front cost and a variable cost:

C(x) = $5.00 + ($2.50/km)x, where x is the number of kilometers covered.

Setting C(x) = $20, we get:

$20 = $5 + ($2.50/km)x

which needs to be solved for x:

$15 = ($2.50/km)x

Dividing both sides by ($2.50/km) yields

6 km = d

72 is the answer to this problem