Every year roughly 25,000,000 kilograms of hair is cut in the united states. each kilogram of hair contains about 0.0002 kg of zinc and each kilogram of zinc is worth about 4 dollars. how many dollars worth of zinc is contained in hair cut in the united states every year?

Worth of zinc is contained in hair cut in the united states is $ 20,000.

Step-by-step explanation:

Given:

Weight of the hair cut in US = 25000000 kg

Weight of zinc in a kg of hair = 0.0002 kg

Cost of a kg of zinc = $ 4

To find: Worth of zinc is contained in hair cut in the united states

Since,

Weight of the hair cut in US = 25000000 kg

Weight of zinc in a kg of hair = 0.0002 kg

⇒ Weight of zinc in 25000000 kg of hair = 0.0002 × 25000000 = 5000 kg

Now, Cost of a kg of zinc = $ 4

⇒ Cost of 5000 kg of zinc = 4 × 5000 = $ 20000

Therefore, Worth of zinc is contained in hair cut in the united states is $ 20,000.

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step-by-step explanation:

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d, x=8

step-by-step explanation:

simplifying

4x + -5 = 2x + 11

reorder the terms:

-5 + 4x = 2x + 11

reorder the terms:

-5 + 4x = 11 + 2x

solving

-5 + 4x = 11 + 2x

solving for variable 'x'.

move all terms containing x to the left, all other terms to the right.

add '-2x' to each side of the equation.

-5 + 4x + -2x = 11 + 2x + -2x

combine like terms: 4x + -2x = 2x

-5 + 2x = 11 + 2x + -2x

combine like terms: 2x + -2x = 0

-5 + 2x = 11 + 0

-5 + 2x = 11

add '5' to each side of the equation.

-5 + 5 + 2x = 11 + 5

combine like terms: -5 + 5 = 0

0 + 2x = 11 + 5

2x = 11 + 5

combine like terms: 11 + 5 = 16

2x = 16

divide each side by '2'.