Final answer:
The actual distance between Boston and Everett is 3 miles.
Step-by-step explanation:
To find the actual distance between Boston and Everett, we need to determine the scale of the map. If every inch on the map represents 2.5 miles, then we can set up a proportion to solve for the actual distance.
Let's say the actual distance between Boston and Everett is x miles. Using the given scale, we know that 3 inches on the map represents 2.5 miles.
Setting up the proportion: 3 inches / 2.5 miles = x inches / x miles
Cross multiplying, we get: 3x miles = 2.5 inches * x miles
Simplifying, we have: 3x miles = 2.5x miles
Dividing both sides by x, we get: 3 miles = 2.5 miles
Therefore, the actual distance between Boston and Everett is 3 miles.