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Shalnov [3]
1 year ago
5

5r^2-44r+120 = -30r+11r

Mathematics
1 answer:
garik1379 [7]1 year ago
3 0
5r^2-44r+120 = -30r+11r \\ \\ 5f^2 - 44r + 120 = -19r \\ \\ 5r^2 - 44r + 120 + 19r = 0 \\ \\ 5r^2 - 25r + 120 = 0 \\ \\ r =  \frac{25+5 \sqrt{71i} }{10} ,  \frac{25-5 \sqrt{71i} }{10} \\ \\ r =  \frac{5+ \sqrt{71i} }{2} ,  \frac{5 -   \sqrt{71i}  }{2} \\ \\ ANSWER:  r =  \frac{5+ \sqrt{71i} }{2} ,  \frac{5 -   \sqrt{71i}  }{2}
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4 0
2 years ago
A dealer paid $10,000 for a boat at an auction. At the dealership, a salesperson sold the boat for 30% more than the auction pri
pickupchik [31]
<span>Given situation:
=> A deadler paid $10 000 for a boat at an auction.
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=> 10 000 dollars + 30%
=> Then the salesperson received a commission of 25% of the difference between the auction price and the dealership price
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=> 2500 , his commission </span>



7 0
2 years ago
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