ememiliamocko10 ememiliamocko10

26-03-2020
Mathematics

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a knife is 3 times the cost of a spoon. 9 spoons and 12 knives cost £82.80
work out the cost of 1 knife using simultaneous equations

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kenlingdad kenlingdad

26-03-2020

Answer:

£5.52

Step-by-step explanation:

K = 3S

9S + 12K = 82.80

9S + 12 (3S) = 45S = 82.80

S = 1.84

K = 3 x 1.84 = 5.52

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