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SubjectsMathematics
TOPIC PRACTICE
Up to 4 questions from this page. Select your focus, then start.
Multiplying the number by 4 gives \(4x\), and adding 7 gives \(4x+7\); hence \(4x+7=31\). Check: for \(x=6\), \(24+7=31\). In exams, translate operations in the stated order.
View question detailsThe terms \(ab\) and \(ac\) have \(a\) as their common factor. Taking it outside the brackets gives \(ab+ac=a(b+c)\), so option A is correct. Option B is incorrect because \(b\) is not a factor of the term \(ac\). In an exam, first identify the common factor of all terms and then write the remaining factors inside the brackets.
View question detailsIn both terms of \(x^2+5x\), \(x\) is the common factor. Taking it outside gives \(x^2+5x=x(x+5)\). Option B introduces an extra factor of \(5\), so it is not equal to the original expression. Exam tip: when taking out a common factor, use the lowest power of the common variable present in every term.
View question detailsSubstitute r = 2 and s = 3 into r + s: 2 + 3 = 5. Therefore, the correct answer is 5. The value 6 comes from multiplying 2 and 3, but the expression requires addition. Exam tip: In substitution questions, replace each variable with its given value and then follow the operation shown.
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