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A price is decreased by 27% The new price is £1138.80 Work out the original price.

This can be solved by making an equation for the old price.

Make the old price be equal to x.

To find the new price the old price must be multiplied by the percentage of the...

Answered by Oliver G. • Maths tutor

4661 Views

N = 2a + b. a is a 2 digit square number, b is a 2 digit cube number. What is the smallest possible value of N?

First, the smallest values of a and b must be found and then substituted into the equation for N.

To find a.

A square number is a number that is the result of multiplying an...

Answered by Oliver G. • Maths tutor

3706 Views

Work out the value of 125 to the power of -2/3.

We want to find 125^-2/3. To do this, we will need to use lots of power rules that we have learnt.

Firstly, when we put a power to another power, we multiply the two powers. For...

Answered by Joe R. • Maths tutor

37284 Views

What is the difference between an allele and a gene?

A gene is a section of DNA coding for a specific protein. This protein will perform a certain function within the organism. You interit two forms of each gene, one from each parent. These are ...

Answered by Yanina P. • Biology tutor

5378 Views

At t seconds, the temp. of the water is θ°C. The rate of increase of the temp. of the water at any time t is modelled by the D.E. dθ/dt=λ(120-θ), θ<=100 where λ is a pos. const. Given θ=20 at t=0, solve this D.E. to show that θ=120-100e^(-λt)

When solving any differential equation, the first method to consider is the seperation of variables. This is the simplest method and, conveniently, it works in this case. To seperate variables:1. Put all ...

Answered by Edmond W. • Maths tutor

9064 Views