For the first one, the two in the middle apply. for the second one, they all apply
Answer: The answer is B.
Step-by-step explanation:
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I think it’s C sorry if I’m wrong
Answer: 
Step-by-step explanation:
1. As you can see,
is equal to the other quadratic equation
.
2. Then, this would the same as write the quadratic equations as following:


3. And then set them equal to each other, as you can see below:

Substituting, you obtain:

3. Keeping the above on mind, you can set up the given equations as a system of equations as folllowing:

Answer:
6
Step-by-step explanation:
Number of water bottles bought by Sylvia = 24
Number of water bottles sold by Sylvia = 
Number of water bottles left with Sylvia = 
Number of water bottles bought by Sam = 36
Number of water bottles sold by Sam = Three times as many as bottles as Sylvia sold = 
Number of water bottles left with Sam = 
It is given that the number of water bottles left with Sylvia and Sam are equal.
i.e.

So, number of water bottles sold by Sylvia = <em>6</em>