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3 years ago

2(y-6)=3(y-4)-y simplify

Mathematics

1 answer:

lesantik [10]3 years ago

7 0

Answer:

x is all real numbers

Step-by-step explanation:

2(y-6)=3(y-4)-y

Distribute

2y - 12 = 3y-12 -y

Combine like terms

2y -12 = 2y -12

Subtract 2y from each side

2y-12-2y = 2y-12 -2y

-12 =-12

This is always true so there are infinite solutions

x is all real numbers

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3 years ago

In the video, the water level was 15 milliliters before adding the chain, and 20 milliliters after adding the chain. When I weig

mr_godi [17]

Answer:

39.7%

Explanation:

1. First find the density of your chain

Density = mass / volume

Volume = displaced water volume

= Volume of Final level of water - initial level of water

= 20 ml - 15 ml = 5 ml

Mass = 66.7 g

Density = 66.7g / 5 ml = 13.34 g/ml

2. Second, write the denisty of the chain as the weighted average of the densities of the other metals:

Mass of gold × density of gold + mass of other metals × density of other metals, all divided by the mass of the chain.

Calling x the amount of gold, then the amount of other metals is 66.7 - x:

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3 years ago