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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 and...
EB
Answered by Evie B. • Maths tutor
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Write 240 grams as a fraction of 4kg in its simplest form

Firstly, we want to make both measurements in grams. This means that we need to change 4kg (kilograms) to grams. Kilo means 1000, therefore there must be 1000 grams ( kilo gram) in 1kg. If we have 4kg, this ...
JK
Answered by Jordan K. • Maths tutor
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Factorise 2x^2+x-3

(2x+3)(x-1)
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Answered by Nisnavai M. • Maths tutor
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How do I make y the subject of an equation? For example in 9x = 3x + 2y.

There are several ways we can rearrange algebraic formulae in order to change the subject. Changing the subject basically means changing the variable (letter) that we are trying to find out, so getting the l...
AJ
Answered by Abbie J. • Maths tutor
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Solve algebraically the simultaneous equations: x^2 + y^2 = 25, y - 3x = 13

Steps:Number both equationsUsing equation 2, solve for y in terms of x.Substitute this answer into equation 1 so that your equation only includes x terms and no y terms.Solve equation 1 for x. (This will be ...
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Answered by Rowena M. • Maths tutor
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