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dalvyx [7]
3 years ago
6

You need exactly 47 bottles of water. You don’t want to buy more than you need, but you want the least expensive way. List the b

est way to buy exactly 47 bottles of water.
Single bottle: $1.25
6-pack: $7.20
12-pack: $13.80
Case (24): $26.40
Mathematics
1 answer:
elixir [45]3 years ago
6 0
That would be 1 case  + 1 12pack + 1 6 pack +  5 singles

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3 years ago
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Answer:
The second choice is the correct one

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(2x+3)^2 + 8(2x+3) + 11 = 0
To use the u substitution, we will assume that:
2x + 3 = u

Substitute with this in the given expression, we will get:
u^2 + 8u + 11 = 0 

The general form of the second degree equation is:
ax^2 + bx + c = 0

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The roots can be found using the rule found in the attached picture.
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This means that, for the given expression:
x = (-7 ± √5 ) / 2

Hope this helps :)

7 0
3 years ago
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