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The length of a rectangle is x+5 and the width is x+3. Write an equation for the area of the rectangle.

area= width x lengtharea= (x+5) x (x+3)area= (x+5)(x+3)area= x²+8x+15

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Solve: x/x+4 + 7/x-2 = 1 (Must show working)[4 marks]

(x(x-2) + 7(x+4) )/ (x+4)(x-2) = 1x(x-2) + 7(x+4) = (x+4)(x-2)x^2 -2x +7x +28 = x^2 -2x +4x -8x^2 +5x +28 = x^2 +2x -83x +36 = 03x = -36x x= -12

Answered by Andrzej M. • Maths tutor

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Sue has a cow farm. Her cows produced on average 25 litres of milk every day for 55 days. Sue bottles the milk in 1/2 litre bottles. How many bottles will Sue need to bottle all the milk.

First work out the total amount of milk produced by the cows.25x55= 1375Then work out how many bottles Sue needs1375/0.5= 2750Sue needs 2750 bottles

Answered by Francesca M. • Maths tutor

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Explain why there were challenges to the Weimar Republic in the years 1919-1923 (12 marks) You may use the following in your answer: The Treaty of Versailles, The Kapp Putsch. You must also use information of your own.

Introduction - State which three reasons you will discuss in order to answer this question (The Treaty of Versailles, The Kapp Putsch and one other factor, e.g. Hyperinflation) As no marks are given in th...

Answered by Celena B. • History tutor

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How do I calculate bond enthalpy from a chemical reaction?

Example Q: See the reaction: CH₄+ Br₂ --> CH₃Br + HBr, with bond energies as follows (in kJ/mol) :C-H = 412, Br-Br = 193,C-Br = x,H-Br = 366Overall energy = –51. Calcu...

Answered by Darcy E. • Chemistry tutor

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