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Ella is 9 years older than Jasmine, Katherine is 4 times the age of Ella and the sum of all their ages is 72. Work out the ratio of Jasmine's age to Ella's age to Katherine's age, in its simplest form.

Jasmine's age + 9 = Ella's age: therefore, J + 9 = E4 x Ella's age = Katherine's age: therefore, 4E = KThe sum of Jasmine's, Ella's and Katherine's ages = 72: therefore, J + E + K = 72take J + E + K = 72 ...

Answered by Evie B. • Maths tutor

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Use the concept of electronegativity to justify why the acid strengths of ethanedioic acid and ethanoic acid are different. (6 marks)

Stage 1: 1-2 marksFirstly, draw and explain the difference in structures between the two acids.
Stage 2: 3-4 marksThe unionised COOH groups in the ethanedioc acid contain two very el...

Answered by Lima H. • Chemistry tutor

5938 Views

What is the correct answer if you rearrange the following, making "c" the subject? (3c+b)/2 = c + a

(3c+b)/2 = c + a To make c the subject of this equation, we first must get all the c variables together on one side of the equation.To do this, first we shall multiply both sides by 2 to remove it from th...

Answered by Matt B. • Maths tutor

2963 Views

Should the fizzy drinks market be regulated or left to the free workings of the market?

This question is asking about the demerit good of fizzy drink consumption. this consumption leads to a negative externality (external cost to society) - this could be added cost to NHS from the increased ...

Answered by Matt B. • Economics tutor

1625 Views

Describe what happens in glycolysis.

Glycolysis takes place in the cytoplasm and comprises two stages: phosphorylation and oxidation. In phosphorylation, glucose is phosphorylated using two molecules of ATP to form glucose phosphate and then...

Answered by Skye L. • Biology tutor

8424 Views