3 years ago

Which ones do not represent a function and which ones do represent a function and why?

Mathematics

1 answer:

elena-14-01-66 [18.8K]3 years ago

3 0

7 is not because a couple x values were repeated

8 is not because the x value -2 was used for two y values

9 is not because a couple x values were used for more than one y value

10 is a function is x alue is only used once

hope this helps :)

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Please answer this and thank you If DE=4x+10, EF=2-1, and DF=9x-15, find DF.

professor190 [17]

I hope that 2-1 means 21.

DE + EF = DF
4x + 10 + 21 = 9x - 15
4x + 31 = 9x - 15
31 = 9x - 4x - 15
31 = 5x - 15
46 = 5x
x = 9 1/5 = 9.2

You want 9x - 15
9*9.2 - 15
82.8 - 15
67.8 <<<<< answer.
If I have given the wrong meaning to 2-1 (which could mean 1) leave another note and I will correct my work.

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Serggg [28]

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