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Maths
GCSE

The perimeter of a right-angled triangle is 81 cm. The lengths of its sides are in the ratio 2 : 3 : 4. Work out the area of the triangle.

Answer is 243cm2. 2+3+4 = 981/9 = 9Non-hypotenuse sides of triangle are therefore length (9x2=18) and (9x3=27)Area of triangle is (18x27)/2 = 243

Answered by Casey A. Maths tutor
2798 Views

How do you solve algebraic equations?

The aim of solving an algebraic equation (such as x2=4(x-3)2 ) is to find the values of x which make the equation correct. There are easy steps to follow for every question which can...

Answered by Mercedes B. Maths tutor
3058 Views

Solve the equation 6x^2 + 17x - 39 = 0

Using the quadratic equation with a = 6, b = 17 and c = -39, x is found to be 1.5 or -4.33

Answered by Sian E. Maths tutor
3446 Views

simplify 36^(-1/2)

1/6 - we can split 36^(-1/2) into 36^(-1*1/2) this way we can apply what we know about basic power rules to split up the problem into more familiar chunks.x^(1/2) means we take the square root of x and x^...

Answered by George B. Maths tutor
5676 Views

Prove that the square of an odd number is always 1 more than a multiple of 4

First, we need to define what an odd number is. An odd number can be expressed as the product of 2n+1, where n can be any whole number bigger than 0. You can check this by inputting a few numbers for n (s...

Answered by Emanuel D. Maths tutor
3243 Views

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