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Maths
GCSE

Given that f(x ) = 4x^3 + 12, evaluate f ( −2) .

In this question we are looking to find a value by substitution. In this case we are substituting the integer (-2) into the equation in place of the x which would be illustrated as f(-2)= 4(-2)^3+12. It i...

MP
Answered by Mikele P. • Maths tutor
3086 Views

A game consists of 5 cups turned upside down, under one of the cups is a prize. 5 friend's pick a cup in turn and lifts it up, if they get the prize, they win , but if not, the cup is removed and the next friend picks. What position is it best to pick?

The first friend to choose has 5 cups to pick from and only 1 that will win them the prize, so their probability of winning is 1/5.The 2nd friend relies on the first friend to not win, this with a probabi...

AM
Answered by Alex M. • Maths tutor
2231 Views

How do I know when to use sine, cos or tan when working with right angled triangles?

When dealing with right angled triangles, you just need to remember 'SOHCAHTOA'. If you struggle to remember this, you may find it easier to recall:'Some Of H

JG
Answered by Jonny G. • Maths tutor
2360 Views

Plot the graph for y = 4x - 3

Create a table for x and y x,1,2,3y,1,5,9Draw the line on a graph

CS
Answered by Conor S. • Maths tutor
2957 Views

Draw the graph of y=x^2-4x-21

We know that this is going to be a “U” shaped parabola as the graph is a positive x^2 graph. The y intercept is the point at which x=0. Substituting in 0 gives when x = 0, y = -21.Now we need the x interc...

TD
Answered by Tutor598463 D. • Maths tutor
3531 Views

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