Search over 10,000 free study notes

we would draw a tree diagram to show this.
4 consecutive days means everyday except friday, or everyday except monday.
this would be 2(0.3x0.3x0.3x0.3x0.7)

1. Turn x-y=6 into y=6+x.2) Insert y=6+x into 2x+y=18; get 2x+6+x=183) Turn the latter equation into 3x=18- 6=124) Divide 12 by 3 to get x=45) Insert x=4 into y=6+x into y=106) Conclude with x=4 and y=...

Start by expanding out the bracket on the top of the fraction to get (6x+4)/(3x²+4x+9). Then using the trick of identifying that the fraction is in the form [g(x)]/[f(x)] where f’(x)=g(x), the ...

(i) To find the gradient of a straight light, we take any two (different) points on the straight line and compute the change in Y divided by the change in X. So here this is; (21-3)/(9-0) = 18/9 = 2. So t...

= x(1-4x^2)From difference of two squares method,= x(1-2x)(1+2x)