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Solve the following simultaneous equations: x^2 + y^2 = 12, x - 2y = 3

This is an example of quadratic simultaneous equations. We need to work out the value(s) of x OR y by rearranging one of the equations and then substituting it into the other equation. Once obtaining the x/y...
IT
Answered by Imama Taiba N. • Maths tutor
6198 Views

Solve x^2 + 8x + 12 = 0

x = -6 or -2
AM
Answered by Alex M. • Maths tutor
3766 Views

Jules buys a washing machine. 20% VAT is added to the price of the washing machine. Jules then has to pay a total of £600 What is the price of the washing machine with no VAT added?

In this question we will label the washing machine as x. In order to answer this question we need to understand that the final price of the washing machine (£600) is the price of the machine without VAT (100...
OM
Answered by Ophelia M. • Maths tutor
26194 Views

Find the derivative of f(x)=exp((tanx)^(1/2))

We use the chain rule. Let u(x)=exp(x), v(x)=x 1/2 , w(x) = tan(x). Then f(x) = u(v(w(x))). So by the chain rule, f'(x) = u'(v(w(x)))*(v(w(x)))'. u'(x) = exp(x). By the chain rule, (v(w(x)))' = v'(w(x)) w'(x...
LD
Answered by Luke D. • Maths tutor
4459 Views

If a train leaves for a 130 mile journey at 1.30pm, and travels at a constant speed of 50 miles per hour, at what time will it arrive?

First, calculate the time taken for the train to complete its journey: Distance = 130, Speed = 50, Time = Distance/Speed = 130/50 = 2.6 hours. Next, use this to calculate the time of arrival: 2.6 hours = 2 h...
LD
Answered by Luke D. • Maths tutor
5724 Views