Final answer:
No, Erick's method is not correct to solve the example problem. In his method, he subtracts 1 mile from 9/10 and then adds 1/10 back. However, this does not accurately represent the proportion of the distances. To solve the example problem correctly, you need to use proportions.
Step-by-step explanation:
No, Erick's method is not correct to solve the example problem. In his method, he subtracts 1 mile from 9/10 and then adds 1/10 back. However, this does not accurately represent the proportion of the distances. To solve the example problem correctly, you need to use proportions.
For example, if the scale is 1 inch = 5.5 miles, to find the number of inches needed to map 16.5 miles, you can set up a proportion: 1 inch / 5.5 miles = x inches / 16.5 miles. Then you can cross multiply and solve for x to find the number of inches.
Erick's method of subtracting and adding does not take into account the proportionality of the distances, and therefore it is not a valid method to solve the example problem.