Can someone help me to solve this please. its very urgent
Helppp

1. 7 / 8

2. if you take ace as a number card then it will 40 number cards which =

40 / 52  = 10 / 13, But no ace card then it will be 36 number cards which =

36 / 52 = 9 / 13

3. 91  / 216

4. 5 / 432

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)