If f(x)=2x^2+1, what is f(x) when x =3 A)1 B)7 C)13 D)19

An author argued that more basketball players have birthdates in the months immediately following July 31, because that was the

Lady_Fox [76]

Answer:

There is sufficient evidence to warrant rejection of the claim that professional basketball players are born in different months with the same frequency.

Step-by-step explanation:

In this case we need to test whether there is sufficient evidence to warrant rejection of the claim that professional basketball players are born in different months with the same frequency.

A Chi-square test for goodness of fit will be used in this case.

The hypothesis can be defined as:

H₀: The observed frequencies are same as the expected frequencies.

Hₐ: The observed frequencies are not same as the expected frequencies.

The test statistic is given as follows:

$\chi^{2}=\sum{\frac{(O-E)^{2}}{E}}$

The values are computed in the table.

The test statistic value is $\chi^{2}=128.12$ .

The degrees of freedom of the test is:

n - 1 = 12 - 1 = 11

Compute the p-value of the test as follows:

p-value < 0.00001

*Use a Chi-square table.

p-value < 0.00001 < α = 0.05.

So, the null hypothesis will be rejected at any significance level.

Thus, there is sufficient evidence to warrant rejection of the claim that professional basketball players are born in different months with the same frequency.

6 0

3 years ago

I need some help! i will try to give brainliest!!!

o-na [289]

Answer:

its A because the Y intercept is at 3

7 0

3 years ago

Math quest after a winter storm, the depth of the snow on cherry street was 10 \text{ cm}10 cm10, space, c, m. but then, the sno

Zanzabum

Answer:

9 cm.

Step-by-step explanation:

Let x be the number of hours.

We have been given that after a winter storm, the depth of the snow on cherry street was 10 cm. Then, the snow started melting at a rate of $\frac{1}{3}$ , so the snow melted in x hours will be $\frac{1}{3}x$ .

Since initially there was 10 cm of snow, so the depth of snow after x hours will be:

$10-\frac{1}{3}x$

To find the depth of snow after 3 hours we will substitute $x=3$ in our expression.

$10-\frac{1}{3}\times 3$

$10-1$

$9$

Therefore, the depth of the snow on cherry street after 3 hours will be 9 cm.

3 0

4 years ago

Read 2 more answers

Determine the value of x. Write the answer in an inequity. Use x only once in the inequality

Romashka-Z-Leto [24]

Answer: 1 < x < 25

Step-by-step explanation:

The sum of two sides must be GREATER than the third side.

a + b > c a + c > b b + c > a

12 + 13 > x 12 + x > 13 13 + x > 12

25 > x x > 1 x > -1

x < 25 1 < x

Length cannot be negative so disregard x > -1

We are left with 1 < x and x < 25

1 < x < 25

4 0

3 years ago

Circumference - Item 2838 Question 4 of 7

nevsk [136]

First, the formula of the circumference.

There are two formulas:
1. C = π*d
[Note: d = diameter]
2. C = 2*π*r
[Note: r = radius]
[Note: This symbol * means to multiply.]

Since we are given the diameter, it’s easier to use the first formula, π*d. Let’s not be too hard on ourselves.

Okay, so let’s state our decided formula:
C = π*d
Then replace d with the car tire’s diameter:
C = π*(32)
Afterwards, find a calculator and multiply π with 32. You will get 100.5309649 as result.

If where to round is stated in your question, round to that. If not, it’s best to round by two decimal places. In this case, we’ll round 100.5309649 to 100.53.

Please add your units as well. In this case, the final answer will be: 100.53 inches.

Since this is a word problem, don’t forget your final statement!

“The approximate circumference of the tire is 100.53 inches.”

7 0

3 years ago

If f(x)=2x^2+1, what is f(x) when x =3 A)1B)7C)13D)19​

If f(x)=2x^2+1, what is f(x) when x =3 A)1B)7C)13D)19