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Solve (x/4)-(2x/x+2) = 1. Give your solutions to 2 decimal places. You must show your working.

We will begin by eliminating fractions in the equation. To do this, the equation will be multiplied by 4 and (x+2), as these are the denominators of the two fractions.
Multiplying by 4 gives:x - (8x/...

Answered by Dogu Z. • Maths tutor

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3 teas and 2 coffees have a total cost of £7.80 5 teas and 4 coffees have a total cost of £14.20 Work out the cost of one tea and the cost of one coffee.

We approach this question using algebra.Lets say the price of teas=x, and the price of coffees = ytherefore 2 equations can be written:3x+2y=7.805x+4y=14.20we now treat these equations as simultaneous equ...

Answered by Abigail R. • Maths tutor

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Find the value of 125^(2/3)

laws of indices state that the denominator of the fraction is the root of the number or letter, and the numerator of the fraction is the power to raise the answer to. Therefore, first we...

Answered by Abigail R. • Maths tutor

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How to differentiate 9x^2+ 4x-7=0

To differentiate we multiply the power by the number infant of the x, and then reduce the power by 1. So the answer would be 18x+4=0

Answered by Abigail R. • Maths tutor

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Five Chocolate bars cost £11. Three Chocolate Bars and two packs of Biscuits cost £13.6. How much does two Chocolate bars and one pack of biscuits cost.

We know from the question that 5C = £11, where C is number of Chocolate Bars. Therefore C= 11/5 which is £2.20.We also know that 3C + 2B = £13.6 where B is number of packs of Biscuits.Since we know what C...

Answered by Samuel S. • Maths tutor

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