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Class 10 Mathematics Polynomials Representing real numbers on the number lineExpertLevel 51

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If c(A=-8.375c), c(B=-csqrt{70}c), and c(C=-cfrac{67}{8}c), which two points represent the same value?

Answer and explanation

Correct answer: A and C

c(-\frac{67}{8}=-8.375c), so A and C represent the same value. In contrast, c(-\sqrt{70}c) is approximately c(-8.367c), so it is not equal to c(-8.375c). Exam tip: convert the fraction to a decimal, or square the decimal to compare it with the radicand.

Related tags

Polynomials Real Numbers Number Line Equivalent Values

Frequently asked questions

What is the correct answer to this question?

A and C

Why is this the correct answer?

c(-\frac{67}{8}=-8.375c), so A and C represent the same value. In contrast, c(-\sqrt{70}c) is approximately c(-8.367c), so it is not equal to c(-8.375c). Exam tip: convert the fraction to a decimal, or square the decimal to compare it with the radicand.

Which subject and chapter does this question cover?

This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Representing real numbers on the number line.

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