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4x+9y=59.5 and x+y=8. Find the values of x and y.

Firstly, take the second equation and make either x or y the subject, which means to make it either x equals or y equals. To make x the subject, we take y away from both sides giving x=8-y. Then, substitute ...
BK
Answered by Bethany K. • Maths tutor
5383 Views

I'm not allowed to bring books into exams, how do I learn them off by heart?

First thing to say is: don't panic. This does't mean that you have to know the whole text off my heart. In fact, if you did, the chances are that you wouldn't use quotes concisely enough to make your argumen...
JH
Answered by Jemima H. • English tutor
3342 Views

A lorry is travelling around a roundabout at constant speed. Why is its velocity changing?

Because velocity is a vector and therefore has both magnitude and direction. Thus as the lorry is changing direction whilst travelling around the roundabout its velocity is also changing (velocity = displace...
AL
Answered by Adam L. • Physics tutor
5261 Views

What is the differential of e^x?

e^x, the differential of the exponential function is itself.
AL
Answered by Adam L. • Maths tutor
5493 Views

What is the best way to approach an unseen translation?

The most important thing is not to dive in right away. It can be so tempting, especially under exam timed conditions, but it will make things much harder. Start by reading all information given about the tra...
AH
Answered by Alex H. • Latin tutor
6847 Views