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a_sh-v [17]
3 years ago
9

Given f(x)=2x2-3, find F(-3)

Mathematics
2 answers:
Kitty [74]3 years ago
8 0

Well, evaluating a function means plugging whatever they gave me in for the argument in the formula. This means that I have to plug this character "§" in for every instance of x. Here goes:

f (§) = (§)2 + 2(§) – 1

= §2 + 2§ – 1

This is definitely weird-looking, but it follows all the rules they gave me, so:

f (§) = §2 + 2§ – 1

Plz mark as Brainliest

Paraphin [41]3 years ago
3 0

Answer:

f(-3) = 15

Step-by-step explanation:

f(x)= 2x^2 - 3

Plug in x = -3 into the function

f(-3) = 2(-3)^2 - 3

f(-3) = 18 - 3

f(-3) = 15

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the perimeter of the floor of a room is 18 metre and its height is 3 cm what is the area of 4 walls of the room​
Lina20 [59]

Note: The height of the room must be 3 m instead of 3 cm because 3 cm is too small and it cannot be the height of a room.

Given:

Perimeter of the floor of a room = 18 metre

Height of the room = 3 metre

To find:

The area of 4 walls of the room.

Solution:

We know that, the area of 4 walls of the room is the curved surface area of the cuboid room.

The curved surface area of the cuboid is

C.S.A.=2h(l+b)

Where, h is height, l is length and b is breadth.

Perimeter of the rectangular base is 2(l+b). So,

C.S.A.=\text{Perimeter of the base} \times h

Putting the given values, we get

C.S.A.=18\times 3

C.S.A.=54

Therefore, the area of 4 walls of the room is 54 sq. metres.

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3 years ago
What is the answer for 17x> -7
Alex17521 [72]

Answer:

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Step-by-step explanation:

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And thats it!

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3 years ago
What is the intersection when you graph the following equations:
Natasha2012 [34]

Answer:

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Step-by-step explanation:

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Which number comes next in this series: 2, 3, 4, 8, 9, 10, 20, 21, 22,?
Mekhanik [1.2K]
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6. The sequence is recursive. Find the value of the next term in the sequence.
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