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WARRIOR [948]
3 years ago
7

If f(x) = - 2x^2 + 2x - 3, what is f(5)?

Mathematics
1 answer:
Sonja [21]3 years ago
4 0

Answer:

-2(5)^2 + 2(5) - 3

-2(25) + 10 - 3

-50 + 10 - 3

-53 + 10

-43

Step-by-step explanation:

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Solve. Write the solution in interval notation. -2x>-8 and -5x<20.
Novosadov [1.4K]

Answer:

The interval notation of the solution is (-4 , 4)

Step-by-step explanation:

* Let us explain a very important point in solving inequality

- When you multiply or divide an inequality by negative number we

   must reverse the symbol of the inequality

- Ex:

∵ 2 < 3

- If we multiply the both sides of the inequality by -1, then the

  inequality will be -2 < -3 and this is completely wrong, so we must

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∴ -2 > -3

* Now let us solve the problem

∵ -2x > -8

- Divide both sides by -2 and remember to reverse the symbol of the

  inequality

∴ x < 4

∵ -5x < 20

- Divide both sides by -5 and remember to reverse the symbol of the

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∴ x > -4

- From both solutions

∴ -4 < x < 4

∴ The solution is {x : -4 < x < 4}

- Interval notation is a way of writing the solutions of inequalities

 ( , ) if x does not equal the end numbers

 [ , ] if x equals the end numbers

 [ , ) , ( , ] if x equals one of the two end numbers

* The interval notation of the solution is (-4 , 4)

4 0
3 years ago
What is the volume of a right circular cylinder with a radius of 4 m and a height of 4 m?
dybincka [34]
Cylinder volume = PI * radius^2 * height
cylinder volume = 3.14159 * 16 * 4
cylinder volume = 3.14159 * 64
cylinder volume = <span> <span> <span> 201.06</span></span></span>

5 0
3 years ago
Read 2 more answers
Solve the equation and enter its solution set below. Enter the solutions in solution set notation separated by a comma and in or
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Answer:

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Step-by-step explanation:

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Answer:

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3 years ago
How many cords of wood could you fit in a room that is 4 yards long, 4 yards wide, and 2 yards high?
Anuta_ua [19.1K]

Hi there!

It depends on the dimensions of each cords of wood.  If each cord of wood is just one square yard large, then you could fit 4*4*2=32 cords of wood into a room that has the dimensions that you described.

-AwesomeRepublic  :)

6 0
3 years ago
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