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 sin(A) = 3/5 and cos(B) = 5/13, where A and B are acute angles, what is sin(A+B)?

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The ratio of two numbers is 3:5, and their sum is 64. What are the numbers?

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What is the HCF of 48 and 180?

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If sin(A) = 1/2 and A is acute, what is the value of A?

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The base of a triangle is 10 cm and its height is 6 cm. What is its area?

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If x^2 - 5x + 6 = 0, what are the roots?

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If a number is divisible by 9, it is also divisible by which of the following?

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The sum of the squares of two consecutive integers is 145. What are the integers?

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If a+b = 10 and ab = 21, what is the value of a^3 + b^3?

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If a:b = 3:4 and b:c = 5:6, what is a:c?

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