HELP QUICK!! IL MARK YOU BRAINLIEST Explain why systems of measurement are defined and provide an example to support your answer.

Step-by-step explanation:

Systems of measurement are defined because we all need to use the same measurements. For example, if we said something is 2 "feet" long, then a person with big feet would make it longer than someone with small feet.

  to support commerce

Step-by-step explanation:

Units of length, mass (weight), and time are defined as national and international standards in order to support commerce.

When you go to purchase a given length of material, you can only do that if your unit of length is the same as the merchant's unit of length.

The same is true for a mass of material. You can only be assured of obtaining 10 pounds of apples, if your pound is the same as the merchant's pound.

If you contract your time at some rate per hour, you and your employer will only be satisfied if your time units are the same.

That is, standard units of length, mass, and time are required for orderly conduct of business.

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Additional comment

The SI system of units defines the meter, kilogram, and second using specific numbers of wavelengths of light. These are presumed to be immutable properties of the universe. (We're not so sure anymore.)

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!