Need help with question 3. Anything helps:) I don’t understand

Cost of each package:          

Hot dog = $3.25

Buns = $2.75

Hamburgers = x         (x = the cost of each hamburger package)

Tony bought 3 packages of hot dogs, 3 packages of hamburgers, and 5 packages of buns for a total cost of $37.75. So:

Cost of hot dog = 3(3.25)      [3 hot dog packages for $3.25 each]

Cost of bun = 5(2.75)        [5 bun packages for $2.75 each]

Cost of hamburger = 3x      [3 hamburger packages for x dollars each]

Cost of hamburger + Cost of hot dog + Cost of bun = total cost

3x + 3(3.25) + 5(2.75) = 37.75    

Your answer is A and D, because for A you distribute 3 into (x + 3.25), which will be (3)x + (3)3.25.

what is the original number? you forgot to add it.

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)