I have been trying all day ): please help someone

53.2 miles per hour or just 53 miles per hour

Step-by-step explanation:

I'm not 100%, but it asked what is the fastests it could have been traveling.

So I plugged in random numbers to see what would get me closest to 200.

d = 0.05(53)² + 1.1(53) = 198.75

d = 0.05(53.2)² + 1.1(53.2) = 200.032

Hope this helps ya!!

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)