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How do you work out the gradient of a straight line?

Look at the graph for two points that you can read the x and y values for easily. Then draw a triangle using these two points and use a ruler to draw a dotted line or just to help you read the x and y values...
CL
Answered by Connor L. • Maths tutor
4112 Views

Solve the simultaneous equations: 3x + 4y = 5 and 2x – 3y = 9

To solve a simultaneous equation we use a method known as elimination. We choose to 'eliminate' or remove the X or Y term. To 'eliminate' x we must firstly determine the lowest common multiple 3 and 2 (as th...
PG
Answered by Prasanna G. • Maths tutor
6594 Views

Factorise the following equation: y = 2x^2 + 4x - 6

For this question, it is best to first take out a factor of 2 from the equation. This will leave you with y=2(x 2 +2x-3). We then need to work out the two numbers that will multiply to -3 and add to 2. We ca...
SC
Answered by Stephen C. • Maths tutor
5152 Views

What is involved in active transport?

This question comes up often in GCSE papers and is a key topic when talking about exchange or cell biology. Active transport comes hand in hand with diffusion and osmosis. It is a key mechanism for moving su...
CS
Answered by Charlotte S. • Biology tutor
15666 Views

Define the three types of chemical bonding.

Ionic bonding occurs between metallic and non-metallic atoms. Electrons are transferred from metal atoms to non-metal atoms. This results in positively charged metal ions and negatively charged non-metal ion...
EP
Answered by Ellie P. • Chemistry tutor
3889 Views