jam amount

kazza1969,

you need to put different questions on diferent threads :)

A triangle has side lengths in the ratio 3 : 4 : 5. If the perimeter of the triangle is 84 cm, what is the length of the shortest side

Orange juice concentrate is mixed with water in the ratio 2 : 5. This mixture is then mixed with lemonade in the ratio 3 : 4. What is the ratio of orange-juice concentrate to lemonade in the final mixture? 

Re: Jam question

If 4 parts = 1kg then 1 part = 1/4 kg and 3 parts = 3/4 kg.  So you would need 3/4kg of sugar.

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       Simplify 12a³b² ÷ 4ab⁻².