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

If 2x = 16, what is the value of x?

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If the ratio of two numbers is 3:5 and their HCF is 4, what are the numbers?

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If the length of a rectangle is doubled and the width is halved, what is the change in area?

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If a rectangle has a length of 10 cm and a width of 6 cm, what is its perimeter?

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

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If sin(θ) = 3/5 and θ is an acute angle, what is tan(θ)?

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What is the HCF of 48 and 180?

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If x + y = 10 and xy = 21, what is the value of x³ + y³?

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A car covers a distance of 150 km in 2.5 hours. What is its average speed?

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If a cylinder has a radius of 7 cm and height of 10 cm, what is its volume?

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