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Sketch y = 9x – 4x^3, showing where the curve crosses the x axis.

First you should look at the equation and try and get a sense of the general shape of the graph. The highest power in here is a 3, so this is a cubic graph. The coefficient (number in front of the x^3) is...

Answered by Anais E. • Maths tutor

4908 Views

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

Answered by Martina M. • Maths tutor

3465 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 = 40...
MM
Answered by Martina M. • Physics tutor
1709 Views

“Mao's ideology was the primary cause for the failure of the Great Leap Forward of 1958 to 1962.” Assess the validity of this view.
Getting started: This question is asking us to assess the validity of a particular view which means that we need to relate the interpretation to the evidence that we have, and assess how ...
JF
Answered by Jacob F. • History tutor
2440 Views

You are given a clear solution that is either an alkene or an alkane. Describe a test using bromine water that you could use to determine whether it is an alkene or alkane solution.
1 mark : Indication that the solution and bromine water should be mixed together1 mark : Indicating that the bromine water will de-colourise / go colourless if the solution contains an alkeneOR 1 mark awa...
NH
Answered by Noah H. • Chemistry tutor
1912 Views

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Sketch y = 9x – 4x^3, showing where the curve crosses the x axis.

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

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?

“Mao's ideology was the primary cause for the failure of the Great Leap Forward of 1958 to 1962.” Assess the validity of this view.

You are given a clear solution that is either an alkene or an alkane. Describe a test using bromine water that you could use to determine whether it is an alkene or alkane solution.

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