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How do i find 30% of 70?

To begin with we need to understand what a percentage is. It is simply a proportional that shows a number as parts of a hundred. So 30% is the same as saying 30/100 which can be simplified by dividing the...

Answered by Kevin R. • Maths tutor

156671 Views

How to integrate lnX?

Firstly I would ask the student what different ways of integration do we know so far? After eliminating each possibility, such as the answer is not XlnX, as this differentiates via product rule, the stude...

Answered by Siam R. • Maths tutor

3754 Views

Work out the area of this triangle given the lengths of 1 sides (a) and 2 angles (A and B) using either the sine rule

We know the area of any triangle is equal to 0.5abSin(C). This means we need to find the length of side b and the angle C.First we can work out the angle C of the triangle as we know the angles in a trian...

Answered by Risha A. • Maths tutor

4224 Views

How to differentiate y=2x(x-2)^5 to find dy/dx?

Firstly, you should formulate the problem by using the product rule, which is: dy/dx = u'v + v'uBy assigning u=2x and v=(x-2)

Answered by Anup P. • Maths tutor

5620 Views

Solve for x and y: x ^2 +2y = 9,y = x + 3

Replace y with x + 3. x^2 + 2(x+3) = 9
2) Expand the bracket, and subtract 9. x^2 + 2x - 3 = 0
3) Factorise the quadratic(x - 1)(x + 3) = 0
4) Therefore, x has 2 solutions. x = 1 and ...

Answered by Changavy K. • Maths tutor

2815 Views