3 years ago

Which expression represents "5 less than twice x"?

Mathematics

2 answers:

tiny-mole [99]3 years ago

8 0

Answer: its 2x -5

Strike441 [17]3 years ago

5 0

2x-5 is the expression that represents 5 less than twice x

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How many full glasses of water will be needed to fill the jug ? Jug= 2.8 litres, Cup= 200ml

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3 years ago

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elena-s [515]

Answer:

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$x(x + 2) = 15 \\ \\ {x}^{2} + 2x = 15 \\ \\ {x}^{2} + 2x - 15 = 0 \\ \\ {x}^{2} + 5x - 3x - 15 = 0 \\ \\ x(x + 5) - 3(x + 5) = 0 \\ \\ (x + 5)(x - 3) = 0 \\ \\ x + 5 = 0 \: or \: \: x - 3 = 0 \\ \\ x = - 5 \: \: or \: \: x = 3 \\ \\ \because \: x \: can \: not \: be \: - ve \\ \\ \therefore \: x = 3 \\ \\ \implies \: x + 2 = 3 + 2 = 5 \\ \\ perimeter \: of \: rectngle \\ = 2(5 + 3) \\ = 2 \times 5 \\ = 16 \: ft$

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3 years ago