Search our library of Maths questions

Top answers

Maths

All levels

This rectangle is twice as long as it is wide. The perimeter of the rectangle is 30cm. What is the area?

50cm²

Answered by Sammy B. • Maths tutor

2609 Views

Write the missing numbers on the lines.

76 + 84 = 16036+54 = 90

Answered by Sammy B. • Maths tutor

1963 Views

Prove that 2^(80)+2^(n+1)+2^n is divisible by 7 for n belongs to the natural number.

We will prove that 2^(n+2)+2^(n+1)+2^n is divisible by 7 using formula to multiply powers with the same base:a^(b) * a^(c) = a^(b+c)Now looking at our expression we can write:2^(n+2) + 2^(n+1) + 2^n = 2^n...

Answered by • Maths tutor

2924 Views

Find the equation of the tangent to the circle (x-3)^2 + (y-4)^2 = 13 that passes through the point (1,7)

Start with a sketch. We can see that the radius from the point (1,7) to the centre of the circle (3,4) is perpendicular to the tangent. The gradient of the radius is (4-7)/(3-1) = -3/2. We know that two p...

Answered by • Maths tutor

3306 Views

Solve the quadratic inequality x^2+x-6>/= 0.

First equate the equation to zero and solve it. To solve the quadratic equation, find the multiples that make '-6' and within this which have a total sum of 1. By this method we can figure out the two bra...

Answered by Anannya M. • Maths tutor

3283 Views