5) Write an equation that models the following problem. Then use your equation to solve the problem. A point D on Denmark's largest island is 2.4 miles away from the nearest point S on the coast of Sweden (assume the coast is straight, which is nearly the case). A person in a motorboat travels straight from D to a point on the beach r miles from S, and then travels r miles farther along the beach away from S. Find a if the person traveled a total of 4.5 miles. 2.4 mi D

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.