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Solve (x^2 - 4)/(2x+4)

The common mistake the students make is to simplify the fraction before factorising numerator and denominator. Here, we need to see that the numerator: x^2 - 4 is a difference between squares , i.e. A^2 - B^...
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Answered by Martina M. • Maths tutor
4573 Views

A student of mass m=50kg runs an experiment. He throws a ball of mass m = 400g from a height h = 20m. What will be the speed of the ball he records just before it touches the ground?

First, we need to see what the important information in this problem is: the mass of the student is irrelevant as the problem focusses on the ball. So we now know that the important information is: m = 400g ...
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Answered by Martina M. • Physics tutor
2494 Views

In year 11, 3/7 of pupils go on holiday abroad in the summer break. Out of these, 1/3 go to France. Determine the ratio of pupils who go to France in summer to pupils who do not go to France in summer.

We can approach this question by breaking it into two steps; first use the information given to work out what proportion of pupils in year 11 went to France. Once we have this, we can go on to find the ratio...
AS
Answered by Anisah S. • Maths tutor
3137 Views

A scalene triangle has 3 angles ABC in degrees, where A = (3x + 7), B = (4x + 5), C = (x + 8). Find the value of largest angle.

Equate all the angles to 180 degrees.3x+7+4x+5+x+8=1808x+20=1808x=160Therefore, x=20 .Hence, A =3(20)+7= 67B =4(20)+5= 85C =20+8= 28 Therefore the largest angle is B.
AP
Answered by Alexander P. • Maths tutor
4193 Views

How should I structure an essay?

In all of your essays, it is important to make sure that you are always answering the question being asked of you. You might have some great points about the witchcraft in Macbeth but that might not be usefu...
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Answered by Hallam B. • English tutor
2338 Views