Which of the following gives the simplest form of the expression 5/2 x (3 + 4)?

5/2 x 5/2

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5/2 x 7

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5/2 x 3 + 4

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5/2 + 5/2 x 4

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Solution

The correct option is B 5/2 x 7
Given expression is $\frac{5}{2}$ (3 + 4)

= $\frac{5}{2}$ $\times$ 7

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The value of following expression when x = 3, $x^{2}$ − 5x + 4 gives $(- 3)^{2}$ − 5 (−3) + 4 = 9 + 15 + 4 = 28

{(x^{6} . y^{- 5 / 4})}^{- 4 / 3}

The value of following expression when $x = - 3$ ,

$x^{2}$ − 5x + 4 gives $(- 3)^{2}$ − 5 (−3) + 4 = 9 + 15 + 4 = 28

\frac{x^{2} - 4}{(x - 2)}

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