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ivolga24 [154]
2 years ago
9

If f(x) = -2x2 + x-5, what is f(3)?

Mathematics
1 answer:
Ilia_Sergeevich [38]2 years ago
7 0

Answer:

f(3) = -20

Step-by-step explanation:

Replace each instance of x in 3^2x -9 =0 with 3:

f(x) = -2x2 + x-5 =  f(x) = -2x^2 + x-5 (" ^ " represents "exponentiation")

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

f(3) = - 18 - 2 = -20

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Inverse function of y = -2x3+1
Ymorist [56]
The answer to your question is y=-5
6 0
2 years ago
Does 6n-18=4(n+2) equal 1n?
Mariulka [41]

Answer:

No.

Step-by-step explanation:

If we were to fill in the slots, the equation would be...

6x3-18=4

6 times three is 18, and 18 - 18 equals 0. So the answer would not be 1.

4 0
2 years ago
What is<br> (1/2)^2- 1/2 -6<br><br><br><br><br><br><br><br><br> .
N76 [4]

Answer:

-6.25 tI am not sure if this can help you but this is what I got

3 0
2 years ago
PLS HELP THIS IS HARD ANYONE PLS
Valentin [98]

This question is very oddly worded.  The domain is the set of x-values, but this is a set of (x,y) ordered pairs.

I'm reading this question as "Here's a function, { (1,5), (2,1), (-1,-7) }.  If this is reflected over the x-axis, what's the range?"

Assuming that is the question that is meant to be asked, reflecting a function over the x-axis will just change the signs of the y-values.

    (1,5) -> (1,–5)

    (2,1) -> (2,–1)

    (-1,-7) -> (-1,+7)

I'd pick the third option.

6 0
3 years ago
What's 8n-(2n-3)=12?
Alborosie
8n- (2n-3) =12
8n-2n= 12+3
6n=15
n= 2.5

Hope this helps :)
6 0
3 years ago
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