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The area of a rectangle is 8cm^2. It has a length of (3x+1)cm and a width of (2x+5)cm. Work out the value of x.

We know that the equation of the area of a rectangle is width times by length. Therefore: 8=(3x+1)(2x+5) If we multiply out the brackets we get: 8=(6x 2 +2x+15x+5), thus, 8=6x 2 +17x+5, and therefore, 0=6x 2...
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Answered by Oliver C. • Maths tutor
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What is an enzyme and explain the effect of two environmental factors on their efficiency?

Enzymes act as biological catalysts for reaction that occur in organisms such as animals and plants. This means that they help to speed up reactions, or allow them to take place at lower activation energy le...
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Answered by Oliver C. • Biology tutor
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Finding the length of the side opposite a known angle while having the hypotenuse length known

Sin x is equal to the length of the opposite side divided by the length of the hypotenuse. So, the length of the opposite side is Sin x multiplied by the length of the hypotenuse
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Answered by Amer A. • Maths tutor
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How many historians' opinions do I need to get an A*?

Your history exam is less about collecting the opinions of other historians and listing them, rather more about your ability to construct an argument whilst analysing alternative opinions. You should read ar...
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Answered by Robyn V. • History tutor
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Describe the role of RuBISCO in photosynthesis.

RuBISCO is an enzyme that is involved in the light independent reactions of photosynthesis, specifically, in the Calvin Cycle. This reaction takes place in the stroma. It catalyses the reaction of carbon dio...
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Answered by Claudia D. • Biology tutor
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