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Allisa [31]
2 years ago
15

ANSWER ASAP ILL MARK BRAINLIEST!!!!

Mathematics
1 answer:
Korolek [52]2 years ago
8 0

Answer:

2 {x}^{2}  - 6x - 1 = 0 \\ a = 2 \:  \:  \:  b =  - 6 \:  \:  \: c =  - 1 \\  \\ x =  \frac{6\binom{ + }{ - } \ \sqrt{  {6}^{2} - 4(2)( - 1)}   }{2 \times 2}  \\  \\ x =  \frac{6 \binom{ + }{ - } \sqrt{44}  }{4}  \\  x =  \frac{6 +  \sqrt{44} }{4} \\  \\  or x =  \frac{6 -  \sqrt{44} }{4}

I hope that is useful for you :)

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Pavlova-9 [17]

Answer: the question can only be simplified to -8z-12 because there is no equal sign.

Step-by-step explanation:

(4z - 12) - 12z

-8z-12

4 0
2 years ago
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-3.5y - 6.2y = - 87.3
mr Goodwill [35]

Answer:

the answer is 9

Step-by-step explanation:

-3.5y - 6.2y = - 87.3

or, -9.7y = -87.3

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7 0
2 years ago
Philip Morris wishes to determine if there is a difference between the proportion of women and proportion of men who smoke cigar
uranmaximum [27]

Answer:

Step-by-step explanation:

This is a test of 2 population proportions. Let 1 and 2 be the subscript for the women and men who smoke respectively. The population proportion of women and men who smoke would be p1 and p2 respectively.

p1 - p2 = difference in the proportion of women and men who smoke.

The null hypothesis is

H0 : p1 = p2

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The alternative hypothesis is

Ha : p1 > p2

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it is a right tailed test

Sample proportion = x/n

Where

x represents number of success(number of complaints)

n represents number of samples

For women

x1 = 14

n1 = 110

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For men,

x2 = 7

n2 = 95

p2 = 7/95 = 0.07

The pooled proportion, pc is

pc = (x1 + x2)/(n1 + n2)

pc = (14 + 7)/(110 + 95) = 0.1

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z = (0.13 - 0.07)/√(0.1)(0.9)(1/110 + 1/95)

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Since it is a right tailed test, we will look at the area to the right of z = 1.47. The p value would be

p value = 1 - 0.9292 = 0.078

Since alpha, 0.005 < than the p value, 0.078, then we would fail to reject the null hypothesis. Therefore, the data does not indicate that the proportion of women who smoke cigarettes is higher than the proportion of men who do at α=.005

8 0
2 years ago
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Viktor [21]
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astraxan [27]

Answer:

The answer would be 25%

Helps this helps!

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3 years ago
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