Search our library of Maths questions

Top answers

Maths

All levels

What is a derivative and how are they used?

A derivative is a function that tells us the gradient of a curve at any point. Say you have a function like f(x)=x³+x² and you want to know when the function is stationary, i.e. has ...

Answered by Nikhil S. • Maths tutor

3831 Views

3x + 2 = 11. what is x?

3x + 2 = 11 . 3x = 9 . x=3 .

Answered by Emma V. • Maths tutor

14303 Views

y = (x/3) - 14. Rearrange this equation to make x the subject.

The aim of this question is to end up with 'x' standing by itself on one side of the equation. The key principle to achieve this is to understand that whatever you do to one side of the equation, you have...

Answered by Maximilian G. • Maths tutor

9074 Views

Dominik hires a satellite phone. His total hire charge is £860. For how many weeks did he hire the phone? (Total hire charge = No. of week X 90 +50)

Rearrange the formula so that it is equal to what the question is asking for (no. of weeks)_{What you have to do to one side you must do to the other!}Total hire ch...

Answered by Grace K. • Maths tutor

4335 Views

What is the definite integral of 2x^2 + 4x + 1 with a lower limit of 3 and a higher limit of 6?

When integrating we add one to the power of x and divide the number in front of the x by the new power for each part of the function. So 2x^2 becomes 2/3 x^3, 4x becomes 4/2 x^2, 1 becomes 1/1 x^1. Then w...

Answered by Ed L. • Maths tutor

3379 Views