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91.

y²= 9

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92.

straight z squared equals 0.04

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93. In the following equations, find which variables x, y, z etc., represent rational numbers and which represent irrational numbers:

straight u squared equals 17 over 4

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94.

straight v squared equals 3

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straight w cubed equals 27 rightwards double arrow space straight w cubed equals 27 space space space space space rightwards double arrow space space space straight w space equals space left parenthesis 27 right parenthesis to the power of bevelled 1 third end exponent

rightwards double arrow space space straight w space equals space left parenthesis 3 cross times 3 cross times 3 right parenthesis to the power of bevelled 1 third end exponent space space rightwards double arrow space straight w space equals space 3

which is a rational number.

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96. In the following equations, find which variables x, y, z etc., represent rational numbers and which represent irrational numbers:

straight t squared equals 0.4

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97. Rationalise the denominators of the following:

fraction numerator square root of 3 minus 1 over denominator square root of 3 plus 1 end fraction

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98. Rationalise the denominators of the following:

fraction numerator 3 plus square root of 2 over denominator 3 minus square root of 2 end fraction

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99. Rationalise the denominators of the following:

fraction numerator 3 plus square root of 7 over denominator 3 minus 4 square root of 7 end fraction

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100. Represent

square root of 5

on the number line.

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