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FrozenT [24]
3 years ago
11

(50 Points)

Mathematics
2 answers:
Yanka [14]3 years ago
5 0
C
If you plug in the values in that equation, it works.
Assoli18 [71]3 years ago
5 0
To find the other system, since we know already that x = 3 and y = 9, we just have to input the value of x and y in each of the equations and see if they work. 

4x + 6y = 64

4 (3) + 6(9) = 64

12 + 54 = 64
66 = 64

That doesn't work, so we move on. 

2x + y = 36

2 (3) + 9 = 36

6 + 9 = 36

15 = 36

Once again, we move on.

4x + y = 21

4 (3) + 9 = 21

12 + 9 = 21

21 = 21

Since we're only looking for one answer, we have found it, meaning that the answer to this question is 4x + y = 21. 
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Answer:

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Step-by-step explanation:

3 represents skateboards and 1 represents bikes. We need to get from 3 to 12 and 1 to the answer by using the same number you used to get from 3 to 12.

To get from 3 to 12 you multiply by 4

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So let's go ahead and multiply 1 by 4 as well

1*4=4

Your ratio is now 12:4 and 4 stands for bikes so there are 4 bikes

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