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Dipen and Nisha are planning a wedding reception. Nisha says, “I want to invite 70 guests.” Dipen says, “If we invite one-fifth fewer guests, we will save more than £500” Is Dipen correct?

Prices are: £40 per guest. Total cost reduced by 5% with over 60 guests. First, we work out the cost of Nisha's suggestion. £40 x 70 guests = 2800 To find 5% of this, we can divide by 10 to get 10% (280), an...
LM
Answered by Lily M. • Maths tutor
7773 Views

How do I solve a quadratic equation?

The best way to solve a quadratic function is to put brackets into the equation. Start with an example Find x when y=0 for the function y=x * 2 + 5 x + 6 As y=0 make the whole equation= 0: x * 2 + 5 x + 6=0 ...
RB
Answered by Rosiered B. • Maths tutor
4659 Views

Differentiate y = (3x − 2)^4

We recognise that this is in the form of a function within a function, i.e u= 3x - 2 is within the u^4 function, therefore here we will use the chan rule to differentiate the equation. The chain rule states ...
WI
Answered by Wajiha I. • Maths tutor
17314 Views

Rearrange the formula to make 'y' the subject: x = (1 - 2y)/(3 +4y)

Ok so we need to get 'y' by itself on the left hand side of equal sign. We will first try to remove the denominator by multiplying 'x' by (3+4y). This gives (3+4y)x = 1 - 2y. We will then expand the brackets...
WI
Answered by Wajiha I. • Maths tutor
18079 Views

What is exactly differentiation?

This is obviously a very important but somewhat difficult to explain question of maths. Let's try to define these terms for normal functions between R (real numbers) and R. Now, if we consider the derivative...
JP
Answered by Joseph P. • Maths tutor
6381 Views