3/4 of the pupils in Year 9 say their favourite colour is red. There are 144 pupils in Year 9. How many students said red is their favourite colour?

108 students

Step-by-step explanation:

Take the fraction and multiply by the number of students

3/4 *144 =108

108 students

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)