Search our library of Maths GCSE questions

Top answers

Maths

GCSE

Simplify 4^2 x 2^4

4²= 2^2x2=2⁴2⁴x2⁴= 2⁸ Explanation: In order to simplify powers you need to get the same base number. In order to ge...

Answered by Jack N. • Maths tutor

4605 Views

If 4x = 9y, and 2x + 5y = 95. What is the value of y^2 - x?

This is a simultaneous equation problem.If 4x = 9y then 2x = 4.5y.Then by substitution, 4.5y + 5y = 95.Then 9.5y = 95 (divide by 9.5) gives y = 10.By using back substitution 2x = 4.5*10 = 45 (divide by 2 ...

Answered by Riku G. • Maths tutor

2795 Views

How do I work out if two lines are parallel?

The gradients of the two lines must be the same. The gradient is m in the equation: y=mx+c For example: L1: y = 3x – 2L2: 3y – 9x + 5 = 0 First rearrange L2 so it is in the same form as L1 to get:3y=9x-5T...

Answered by Alexandra B. • Maths tutor

2887 Views

The equation of line L is y= 3x+2 and the equation of line M is 3y–9x+5=0. Show that these lines are parallel.

First step is to understand what it means for lines to be parallel. This is when the gradients of two lines are the same.This is much easier to see when the format of the equations is the same, so lets re...

Answered by Paulius P. • Maths tutor

3105 Views