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How do I do simultaneous equations?

example: solve the simultaneous equations 3x+2y=4 and 2x+y=3 1: 3x+2y=4 2: 2x+y=3 want to either get same number of x's or same number of y's in equation 1 and equation 2 easiest way to do this is by making ...
CS
Answered by Cerys S. • Maths tutor
4309 Views

Basic Conversions (Binary, Hexadecimal, etc)

1. Convert the hexidecimal number D6 to decimal Since it is base-16, we multiply the first digit (6) by 16^0 - giving us 6 We then multiple the second digit (D - which equates to 13) by 16^1 - giving us 208 ...
CJ
Answered by Calum J. • Computing tutor
3964 Views

Common mistakes made in A-Level exams

We all make silly mistakes when in comes to Maths, so here are some common mistakes to help you out. 1. Partial Fractions: Many students think x+2/(x+1)^2 becomes A/(x+1) + B/(x+1) This is however incorrect,...
CJ
Answered by Calum J. • Maths tutor
5101 Views

Why does inflation decrease but prices continue to go up?

This is a good question and it refers to the difference between deflation and disinflation. Sometimes if inflation is at 2% and it decreases to 1.5% for example, there will still continue to be a general pri...
LB
Answered by Luke B. • Economics tutor
2486 Views

(2x+3)/(x-4) - (2x-8)/(2x+1) =1

(2x+3) (2x+1) = 4x^2 + 8x + 3 (2x-8) (x-4) = 2x^2 - 16x - 32 (4x^2+8x+3) - (2x^2-16x-32) = 1 2x^2 - 8x - 29 = 1 2x^2 - 8x - 30 = 0 x^2 - 4x - 15 = 0 Using the quadratic formula; x = 6.36 or x= -2.36 to 2dp
MA
Answered by Masie A. • Maths tutor
1911 Views