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pshichka [43]
2 years ago
7

If f (x) = -2x2 + 6, find f (-3).

Mathematics
2 answers:
Margarita [4]2 years ago
7 0

Answer:

Step-by-step explanation:

postnew [5]2 years ago
7 0

Answer:

f(- 3) = - 12

Step-by-step explanation:

To find f(- 3) substitute x = - 3 into f(x) , that is

f(- 3) = -2(- 3)² + 6 = -2(9) + 6 = - 18 + 6 = - 12

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When f(x)=5x^2-2x+5, evaluate f(-3)
patriot [66]

Answer:

f(-3)=56

Step-by-step explanation:

When evaluating a specific input for a function, you just plug that input in for x.

So in this case, f(-3)=5(-3)^2-2(-3)+5

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

f(-3)=5(9)+6+5

f(-3)=45+6+5

f(-3)=56

8 0
3 years ago
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Bezzdna [24]
The answer is option C. 9xy sqrt 2x
5 0
3 years ago
What is the slope of the line.
irina [24]

Answer:

A.

Step-by-step explanation:

I believe it's A. Hope this helps.

7 0
3 years ago
Read 2 more answers
-3(x - 5) = 3x + 15
Travka [436]

Answer:

false

Step-by-step explanation:

because

-3(x-5)

-3x+15

6 0
3 years ago
Americans receive an average of 20 Christmas cards each year. Suppose the number of Christmas cards is normally distributed with
soldier1979 [14.2K]

The distribution of X is X ~ N (20 , 6) and the probability that this American will receive no more than 24 Christmas cards this year is 0.7486.

<h3>Probability</h3>

a. Distribution

X ~ N (20 , 6)

b. P(x ≤24)

= P[(x - μ ) / σ  (24 - 20) / 6]

= P(z  ≤0.67)

=  0.74857

=0.7486

Hence:

Probability = 0.7486

c. P(21 < x < 26)

= P[(21 - 26)/ 6) < (x - μ  ) / σ   < (24 - 20) / 6) ]

= P(-0.83 < z < 0.67)

= P(z < 0.67) - P(z < -0.)

=  0.74857- 0.2033

= 0.54527

Hence:

Probability =0.54527

d. Using standard normal table ,

P(Z < z) = 66%

P(Z < 0.50) = 0.66

z = 0.50

Using z-score formula,

x = z×  σ +  μ

x = 0.50 × 6 + 20 = 23

23 Christmas cards

Therefore the distribution of X is X ~ N (20 , 6) and the probability that this American will receive no more than 24 Christmas cards this year is 0.7486.

Learn more about probability here:brainly.com/question/24756209

#SPJ1

8 0
2 years ago
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