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A line joins 2 points (2,9) and (5,4). Calculate the gradient of the straight line and then write down the equation of the straight line.

The first thing to do is to look at the points given and decide if you are going to get a negative or positive gradient. We can determine, from inspection that the gradient will be negative because as the x ...
LM
Answered by Liam M. • Maths tutor
5660 Views

Find the roots of 2x^2-5x-6=0 to 3dps

if we see the phrase "to N dps" this is a big hint to use the quadratic formula. The first thing we have to do is to is pick out the co-efficients ax^2+bx+c=0 a=2, b=-5, c=-6 Now we can pug these n...
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Answered by Liam M. • Maths tutor
5110 Views

Simplify √90+√360+5√10

The object of surds is to look for square numbers in each term and take the square root of them. √90=√9 √10=3√10 √360=√36 √10=6√10 Therefore adding all the terms together 3√10+6√10+5√10=14√10
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Answered by Liam M. • Maths tutor
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Why are certain fields chosen to be the primary key in a database?

A Primary key is a field in a database that is used as an unique identifier for each record. Therefore the field that is chosen as the primary key has to be something that will be different for every record,...
CB
Answered by Corey B. • Computing tutor
2424 Views

What can the nucleus emit during radioactive decay?

There are three possible emissions from a nucleus decaying radioactively. The first is the emission of an alpha particle. Alpha particles consist of neutrons and protons. Secondly a beta particle can be rele...
SK
Answered by Samuel K. • Physics tutor
9267 Views