Express x squared - 4x + 7 in completed Square form

Idk if this is just because I don't know football slang, but could anyone help, I'm stuck! Any help would be appreciated!

Lelu [443]

I believe that it is 36 1/3 yards. The other option might be 10 yards. Try both of those out.

5 0

4 years ago

The director of a radio broadcasting company wants to determine whether the mean length of commercials on his station is equal t

denpristay [2]

Answer:

The value of t test statistics is 4.518.

Step-by-step explanation:

We are given that director of a radio broadcasting company wants to determine whether the mean length of commercials on his station is equal to 24 seconds.

He samples 200 commercials, and finds that the average length of these commercials is 26.3 seconds, with a standard deviation of 7.2 seconds.

Let $\mu$ = mean length of commercials on his station.

So, Null Hypothesis, $H_0$ : $\mu$ = 24 seconds {means that the mean length of commercials on his station is equal to 24 seconds}

Alternate Hypothesis, $H_A$ : $\mu\neq$ 24 seconds {means that the mean length of commercials on his station is different from 24 seconds}

The test statistics that would be used here One-sample t test statistics as we don't know about the population standard deviation;

T.S. = $\frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\bar X$ = sample average length of these commercials = 26.3 seconds

s = sample standard deviation = 7.2 seconds

n = sample of commercials = 200

So, test statistics = $\frac{26.3-24}{\frac{7.2}{\sqrt{200} } }$ ~ $t_1_9_9$

= 4.518

The value of t test statistics is 4.518.

3 0

3 years ago

I need to know order pairs for this equation

kompoz [17]

Hi, you haven't provided the equation that you need order pairs for.

Therefore, I'll just explain how to find order pairs in general and you can apply the same method to the the equation you have

Answer with explanation:

Order pairs of any equation are (x,y) values that satisfy this equation

To get them, the simplest way is to assume a value for x, use this value to substitute in the equation you have and then solve for the corresponding y

Example:

Consider the equation: x + 2y = 8

at x = 0: 0 + 2y = 8 ............> 2y = 8 ..........> y = 4 ............> order pair is (0,4)

at x = 2: 2 + 2y = 8 ............> 2y = 6 ..........> y = 3 ............> order pair is (2,3)

at x = 4: 4 + 2y = 8 ............> 2y = 4 ..........> y = 2 ............> order pair is (4,2)

Now, we can say that (0,4), (2,3) and (4,2) are order pairs that satisfy the given equation

For your equation:

1- Assume value of x

2- Substitute with that value in the equation

3- Solve the equation for the corresponding y

4- The order par pair would be:

(assumed x value , corresponding calculated y value)

Hope this helps :)

3 0

3 years ago

Given: ABCD is a parallelogram AM , BN − angle bisectors DM = 4 ft, MN = 3 ft Find: The perimeter of ABCD

Svetlanka [38]

Answer:

P= 30ft

Step-by-step explanation:

7 0

3 years ago

What is the best way to solve 3 digit and 2 digit subtraction problems?

Leno4ka [110]

Just work on it like any other subtraction problem. Subtract the digits in the ones' place column (8 - 2 = 6) and place the answer below the line in the ones' place column.

6 0

4 years ago

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Express x squared - 4x + 7 in completed Square form​

Express x squared - 4x + 7 in completed Square form