Unit test Google Classroom To take a taxi, it costs $\$ 3.00$ plus an additional $\$ 2.00$ per mile travelec You spent exactly $\$ 20$ on a taxi, which includes the $\$ 1$ tip you left. How many miles did you travel? miles

Step 1 ：The problem is asking for the number of miles travelled given the total cost of the taxi ride. The total cost is made up of a fixed cost, a variable cost per mile, and a tip.

Step 2 ：The fixed cost is \$3.00, the variable cost is \$2.00 per mile, and the tip is \$1.00. The total cost is \$20.00.

Step 3 ：We can set up an equation to represent this situation and solve for the number of miles travelled. The equation would be: Fixed cost + (Variable cost per mile * Number of miles) + Tip = Total cost

Step 4 ：We can substitute the given values into this equation and solve for the number of miles. The equation becomes: \$3.00 + (\$2.00 per mile * Number of miles) + \$1.00 = \$20.00

Step 5 ：Subtract the fixed cost and the tip from the total cost to find the cost of the miles travelled: \$20.00 - \$3.00 - \$1.00 = \$16.00

Step 6 ：Divide the remaining cost by the variable cost per mile to find the number of miles travelled: \$16.00 / \$2.00 per mile = 8 miles

Step 7 ：Final Answer: You travelled \(\boxed{8}\) miles.