The pie chart shows information about pupils in KS3 at a school. Year 9
Year 7
Year 8
Altogether, there are 200 pupils in KS3.
a)
b)
How many pupils are in year 7?
How many pupils are in year 9?

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

step-by-step :

55% are girls and 45% are boys : ) hope this

step-by-step explanation: