Top answers

Maths
GCSE

Factorise X^2-X-20

(X+4)(X-5)

SW
Answered by Stephen W. Maths tutor
3547 Views

Solve the following simultaneous equations: 3x+y=11, 2x+y=8

x=3, y=2

RS
Answered by Reuben S. Maths tutor
2890 Views

Work out the cube root of (64x1000).

We are asked to calculate (64x1000)1/3. We can use the laws of indices to write that expression as 641/3x10001/3, which is easier to evaluate. To work out 641/3...

MP
Answered by Martin P. Maths tutor
6616 Views

Use the quadratic formula to find the solutions to x^2+2x-35=0

x=5 and x=7

GN
Answered by Georgia N. Maths tutor
6421 Views

The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle.

The equation for the area of a triangle is 1/2 x base x height
So, first we need to know the length of the base and the height of the triangle.
We know that the perimeter of the triangle is 72...

AB
Answered by Alison B. Maths tutor
4234 Views

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