A man's shoe size is related to his foot length and can be modeled by the equation s = 1.7f - 7.2, where s is shoe size and f is foot length,
in inches. What is the shoe size of a man whose foot measures 9 inches?

A linear equation is an equation in which the highest power of the variable is always 1. It is also known as a one-degree equation. The standard form of a linear equation in one variable is of the form Ax + B = 0.

Putting the value of f in the linear equation to calculate s.

[tex]s = 1.7f - 7.2\\s = 1.7 * 9 - 7.2\\s = 15.3 - 7.2 = 8.1\\[/tex]

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A man's shoe size is related to his foot length and can be modeled by the equation s = 1.7f - 7.2, where s is shoe size and f is foot length, in inches. What is the shoe size of a man whose foot measures 9 inches?

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What is linear equation?

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A man's shoe size is related to his foot length and can be modeled by the equation s = 1.7f - 7.2, where s is shoe size and f is foot length,
in inches. What is the shoe size of a man whose foot measures 9 inches?