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How can I tell if two lines are perpendicular from the equations?

In order to compare two equations they need to be in the same form. This means that the y's have to be on the left, and the x's have to be on the right - so the first step is to rearrange both of the equatio...
BS
Answered by Ben S. Maths tutor
8277 Views

How should I decide which medical school to apply to?

This is a very difficult question, particularly as with medicine, you are limited to 4 instead of the normal 5 UCAS applications. There are over 30 medical schools that all have very different requirements. ...
OH
3993 Views

The inequality x^4 < 8x^2 + 9 is satisfied precisely when...

This is a multiple choice question, with possible answers: (a) -3 &lt; x &lt; 3; (b) 0 &lt; x &lt; 4; (c) 1 &lt; x &lt; 3; (d) -1 &lt; x &lt; 9; (e) -3 &lt; x &lt; -1. Let's start by rearranging the inequali...
TH
Answered by Tim H. MAT tutor
7109 Views

How to form the perfect tense in French using 'avoir'.

If we want to express a completed action which happened in the past in French, we use the perfect tense. In order to form it we use either avoir or etre and conjugate them in the present form and then add th...
HA
Answered by Hannah A. French tutor
5602 Views

What is an enzyme?

An enzyme is a protein catalyst . A catalyst is a substance which alters the rate of a chemical reaction. (So it can speed up a chemical reaction). The key thing about an enzyme is that it is not itself chan...
LD
Answered by Lauren D. Biology tutor
11343 Views