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Ad libitum [116K]
3 years ago
9

Which of the following are general characteristics of all three groups of fish?

Biology
1 answer:
Kipish [7]3 years ago
4 0

i think the answer is 3 4 5

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Kara has 21 collectible buttons to sell. She sells the small buttons for $3 and the large buttons for $4, and earns a total of $
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Answer: x+y=21, 3x+4y=68

Explanation:

Here x represents the number of small button and y represents the number of large button,

And, According to the question,

Total number of button = 21

Thus,  x + y = 21

Also, She sells the small buttons for $3 and the large buttons for $4, and earns a total of $68

That is,   3x + 4y = 68

Thus, the system of equations that can be used  to calculate the number of large and small buttons sold are,

x + y = 21,  3x + 4y = 68

First Option is correct.


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