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nydimaria [60]
3 years ago
12

F(x)= -x^2+3x-8 Is the quadratic function a minimum or maximum

Mathematics
1 answer:
Brilliant_brown [7]3 years ago
3 0

Answer:

the answer is this lolololololol

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Tell me how to do it and why please
matrenka [14]

Answer:

It would take them 6.667 minutes to paint 50 square feet together.

Step-by-step explanation:

This is a classic work problem.  If Sam can do the job in 10 minutes, she can get done 1/10 of the job in one minute.  If you can do the job in 5 minutes, you can 1/5 of the job done in one minute.  To find out how many minutes it will take them together to paint 25 square feet, set the addition of their times equal to 1/x:

\frac{1}{10}+\frac{1}{5}=\frac{1}{x}

x is how long it takes them to get the job done together.  Find the common denominator and multiply it through be everything to get rid of the denominators altogether.  That denominator is 10x:

(10x)\frac{1}{10}+(10x)\frac{1}{5}=(10x)\frac{1}{x}

Simplify to get the simple equation x + 2x = 10 and 3x = 10.  That means that x=3 1/3.  That's how long it takes to do 25 square feet.  Double that time for 50 square feet.

8 0
3 years ago
EB and EC = 15 cm . What is the area of abcde? _sq cm
Aliun [14]
75 sq cm that should be right
8 0
2 years ago
The price of a car has been reduced from $15,500 to $10,695. What is the percentage decrease of the price of the car?
IceJOKER [234]
(10,695/15,500 -1) * 100% = -31%

The price was decreased 31%.
5 0
3 years ago
Eighty percent of the tickets for the baseball game on july 4th been sold. there are 20,000 tickets. how many been sold
Viktor [21]
16000 tickets have been sold.

Glad I could help :)
6 0
2 years ago
It costs $6.45 to buy 5 songs on I-tunes. How much does it cost to buy 20 songs?
babunello [35]

Answer:$25.80

Step-by-step explanation:

6.45/5 = 1.29

1.29 x 20 =25.80

5 0
2 years ago
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