If 2/5 of the total students are boys and they are 160 girls and find number of boys

106 boys

Step-by-step explanation: first you need to find how much 1/5 of the girls are which can be found by dividing the 160 ÷ 3 (because the girls are 3/5) which is: 160 ÷ 3 = 53.3 = 1/5 then, multiply this by 2 ( because the fraction of boys is 2/5) which is: 53.3 × 2 = 106.6 ( you don't need to round off but make it a whole number).

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)