Topic Details (Notes format)

How to Solve Absolute Value Equations

Subject: Mathematics

Book: Maths Mastery

Absolute value equations have the general form |x| = a. This translates to x = a or x = –a, because absolute value represents distance from zero on the number line. For a more complex example, |2x – 6| = 4 means 2x – 6 = 4 or 2x – 6 = –4. Solving these yields x = 5 or x = 1. Absolute value appears in real-world contexts like measuring deviations from an average, keeping track of net distance traveled, or financial calculations involving profit/loss changes. Familiarity with absolute value equations enables flexible handling of scenarios involving direction or magnitude in everyday problem-solving.

Practice Questions

What is the length of the diagonal of a square with a side length of 7 cm?

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If a = 4 and b = 5, what is the value of (a+b)^2?

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A number is increased by 20% and then decreased by 20%. What is the net change?

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If a:b = 5:7 and b:c = 6:11, what is a:c?

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If the sum of three consecutive integers is 72, what are the integers?

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What is the square root of 121?

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If 3x = 81, what is the value of x?

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What is the area of a circle with a diameter of 14 cm?

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The perimeter of a rectangle is 40 cm, and its length is 12 cm. What is its width?

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What is the greatest common divisor (GCD) of 36 and 48?

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