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2 years ago

Use synthetic substitution to evaluate the polynomial for the given value x = -3. P(x) = 2x2 + 7x - 1

1 answer:

7 0

I'm assuming that is 2x squared, and not 2 multiplied by 2, as a given question usually wouldn't come in such a silly format. I do wish people would start using (2x^2) or (2x²), though.

Just substitute the value of x (-3) in to the equation to find the value of y, or P(x).

2(-3)² + 7(-3) - 1 = -4

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Coupons driving visits. A store randomly samples 603 shoppers over the course of a year and nds that 142 of them made their visi

s2008m [1.1K]

Answer:

The 95% confidence interval for the proportion of all shoppers during the year whose visit was because of a coupon they'd received in the mail is (0.2016, 0.2694)

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$n = 603, \pi = \frac{142}{603} = 0.2355$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2355 - 1.96\sqrt{\frac{0.2355*0.7645}{603}} = 0.2016$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.2355 + 1.96\sqrt{\frac{0.2355*0.7645}{603}} = 0.2694$

The 95% confidence interval for the proportion of all shoppers during the year whose visit was because of a coupon they'd received in the mail is (0.2016, 0.2694)

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2 years ago

HELP - In baseball's home run hall of fame, Hang Aaron has 181 fewer than twice the number of home runs than that of Chipper Jon

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Answer:

Wait is this melody Montejano from tustin high ?

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2 years ago

8.72 inches to feet

Nezavi [6.7K]

Answer:

0.7266667

Step-by-step explanation:

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2 years ago

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Which phrases can be used to represent the inequality? Check all that apply. 1/2+k>18

noname [10]

Answer:

Step-by-step explanation:

MORE THEN IMPLIES + SIGN. SO NO

GREATER THAN IMPLIES AN INEQUALITY. SO YES

BELOW ALSO IMPLIES AN INEQUALITY BUT THE SIGN IS > NOT <. SO NO

ABOVE EIGHTEEN CAN WORK (NEVER HEARD IT PHRASED THIS WAY). SO YES

LESS THAN EIGHTEEN IS NO BECAUSE WE WANT GREATER THEN EIGHTEEN. SO NO

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2 years ago

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The sixth term is 22 and the common difference is six what is the fiftieth term

garri49 [273]

ANSWER

The fiftieth term is 286.

EXPLANATION

A sequence with a common difference,

$d = 6$

is an arithmetic progression.

The nth term is

$a_n=a_1 + d(n - 1)$

If the sixth term is 22 then,

$22=a_1 + 6(6 - 1)$

$22=a_1 + 30$

$22 - 30=a_1$

$a_1 = - 8$

The fiftieth term is

$a_{50}= - 8 + 6(50 - 1)$

$a_{50}= - 8 + 6 \times4 9$

$a_{50}=- 8 +294$

$a_{50}=286$

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2 years ago