Search over 10,000 free study notes

The formula for the area of a circle is pir²,therefore for semi-circle, the formula becomes1/2pir²
Using our known values this is 1/2pi*16 (4<...

x y-3 10-2 4-1 00 -21 -22 03 4
And then be able to plot out these points on a simple graph.
The x-coordinate of the turning ...

Rearrange the second equation (or first) in terms of y (or x) y = 2-xthen subsitute into the other equation 3x + (2-x) = 4The solve for x : 2x = 2 x = 1then subsitute that value for x into any equation an...

x² + 4x + 3 is a quadratic equation. We're looking for a pair of numbers that add to make 4, and multiply together to make 3. Students should be encouraged to try options (e.g. 2 and 2).
T...

The equation of a line is written in the form y=mx+c where m is the gradient of the line and c is the y-intercept. These are the two values that we will need to calculate.For example, lets take the two p...