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Phantasy [73]
3 years ago
14

Teresa sells beaded necklaces. Each large necklace sells for $5.70 and each small necklace sells for $5.10. How much will she ea

rn from selling 4 large
necklaces and 1 small necklace?
Mathematics
1 answer:
Kitty [74]3 years ago
5 0

Answer:

$27.90

Step-by-step explanation:

Step 1: Find how much 4 large necklaces will cost

$5.70 * 4 = $22.80

Step 2: Add the cost of 4 large necklaces to the price of 1 small necklace

$22.80  + $5.10 = $27.90

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This is a polynomial of degree 2, and remember that complex roots always come in pairs; therefore, in a second degree polynomial you can only have 0 real roots and 2 complex roots, or 2 real roots and 0 complex roots. There is no way you can have 1 real root and 1 complex root because, as stated before, complex (non-real) roots always come in pairs; so the only way of having 1 real root is dumping the polynomial of degree 2 (14 x^{2}) by changing the 14 to 0. That way we'll left with f(x)=5x-1 which only has one real root:
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