Find the value of when and .
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Find the value of when and .
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Work out the value of when andÂ
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Sofia is trying to simplify Â
Her method is
divide by
then
addÂ
Evaluate her method.
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Use the formula .
Calculate when = 5, = 10 and = 3.
= ..............
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Calculate when and .
= ................................................
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Find the value of when and
................................................Â
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.
Find the value of y when , Â and .
..............................................Â
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The body mass index, , for a person of mass kg and height metres is given by the formula
Usman has a mass of 50 kg.
He has a height of 1.57 m.
Work out Usman's body mass index.
Give your answer correct to one decimal place.
Tom's height is 1.80m.
He wants his body mass index to be 21
Work out the mass that will give Tom a body mass index of 21.
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 Work out the value of .
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Work out the value of Â
Write down all the figures on your calculator display.
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Work out the value of when
...................................................
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Find the value of whenÂ
.........................................
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Find the value of when and .
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Find the value of when and .
 = ..............................................
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Find when Â
Give your answer in standard form, correct to 4 significant figures.
Â
= ....................................................Â
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Work out the value of when
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and are positive values.
Show that  always simplifies to the same value.
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Amy has beads.
Billy has three more beads than Amy.
Carly has four times as many beads as Billy.
Circle the expression for the number of beads that Carly has.
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