Search our library of Maths GCSE questions

Top answers

Maths

GCSE

Solve the simultaneous equations: 2x-y=x+4; x^2+4y^2=37

taking equation 1 and solving for x: 2x-y=x+4 x-y=4 x=y+4 Sub our new equation into equation 2 from the question: (y+4)²+4y²=37 Expand and simplify: y²+8y+16+4y²

Answered by Alexander W. • Maths tutor

5178 Views

A line passes through coordinates (-2,4) and (8,9). Does the point with coordinates (32,55) fall on this line?

To work out if a given point with coordinates (X,Y) falls on a line you must work out the equation for the line. All straight lines follow the formula: y=mx+c with 'y' being the Y coordinate, 'x' being th...

Answered by Nicholas S. • Maths tutor

6976 Views

Find x: 4x + 7 = 27

4x + 7 = 27 4x = 20 x = 5

Answered by Saskia P. • Maths tutor

3436 Views

Solve x^2=4(x-3)^2

To solve this equation we need to expand the right hand side to get: x^2 = 4(x^2-6x+9), then we multiply whats in the bracket by 4 to get: x^2 = 4x^2 - 24x +36. We can subtract x^2 from both sides to give...

Answered by Kelsi F. • Maths tutor

4792 Views