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AleksandrR [38]
3 years ago
14

If f(x) = 2x2 + 1, what is f(x) when x = 3?.

Mathematics
1 answer:
kvv77 [185]3 years ago
8 0

Answer:

5/3 is the correct answer

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Need help now please
baherus [9]

Answer:

2

Step-by-step explanation:

rise over run = y/x

3/1.5= 2

8 0
3 years ago
The mayor is interested in finding a 98% confidence interval for the mean number of pounds of trash per person per week that is
saul85 [17]

Solution :

Given :

Sample mean, $\overline X = 34.2$

Sample size, n = 129

Sample standard deviation, s = 8.2

a. Since the population standard deviation is unknown, therefore, we use the t-distribution.

b. Now for 95% confidence level,

   α = 0.05, α/2 = 0.025

  From the t tables, T.INV.2T(α, degree of freedom), we find the t value as

  t =T.INV.2T(0.05, 128) = 2.34

  Taking the positive value of t, we get  

  Confidence interval is ,

  $\overline X \pm t \times \frac{s}{\sqrt n}$

 $34.2 \pm 2.34 \times \frac{8.2}{\sqrt {129}}$

 (32.52, 35.8)

 95% confidence interval is  (32.52, 35.8)

So with $95 \%$ confidence of the population of the mean number of the pounds per person per week is between 32.52 pounds and 35.8 pounds.

c. About $95 \%$ of confidence intervals which contains the true population of mean number of the pounds of the trash that is generated per person per week and about $5 \%$ that doe not contain the true population of mean number of the pounds of trashes generated by per person per week.  

4 0
3 years ago
I need that answer assssapppp​
Contact [7]
Answer is C. Y intercept is 3. The slope is 2/3x.
3 0
3 years ago
Please help me with this question
wel
If I could get more context then that would help. Because an exponent being an odd number doesn’t do anything, so it could be either a negative or a positive
4 0
3 years ago
Convert 3 2/7 into improper fractions <br><br> 21/7<br> 23/7<br> 41/7<br> None of the above
Vesnalui [34]
Hello,

The correct answer is B.

Further explanation: The first step is to multiply 3 by 7. That gives you 21, then add 21+2. Then put your denominator at the bottom.

Workspace:

3 * 7

=21

21 + 2

=23/7
5 0
3 years ago
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