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A football pitch has a length of the xm. Its width is 25m shorter than the length. The area of the pitch is 2200m2. Show that x2 - 25x - 2200 =0 and work out the length of the football pitch.

Draw rectangle with length x and width (x - 25)show that area = length * width = x(x -25) = x2 - 25xx2 - 25x = 2200x2 - 25x -2200 = 0This cannot be factorised therefore must use quadratic equation: x = [-...

Answered by Sophie O. • Maths tutor

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What is the difference between rationalism and empiricism?

Rationalism claims, that the information we gain is independent from our external experience (i.e. the senses). they use deduction as a scientific method. Deduction means, that we form a complex ideas by ...

Answered by Zuzana G. • Philosophy tutor

2762 Views

Ethanol, CH3CH2OH, can be converted into a carboxylic acid with two carbon atom. Name the carboxylic acid formed from ethanol and draw its structure. Show all bonds between atoms.

Ethanoic acid (CH3COOH)Clear structure of molecule must be shown. One C atom with existing three single bonds to three H atoms and a single bond with the other C atom. Second C atom has a double bond

Answered by Sophie O. • Chemistry tutor

4157 Views

Expand and simplify (x-2)(2x+3)(x+1)

To simply this expression means to write this same expression in its lowest terms. The first step we need to do is expand two of these brackets, we will start with the bracket in the middle and the last ...

Answered by Shayma M. • Maths tutor

4343 Views

Expand and simplify 3(m + 4) – 2(4m + 1)

You need to follow the basic rules of expanding brackets i.e. before doing any of the sums inside of the bracket (which would be impossible as you do not know the value of 'm'), you need to perform the ta...

Answered by Lizzie W. • Maths tutor

3472 Views