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sergiy2304 [10]
3 years ago
14

Find two integers whose sum is 3 and product is -108.

Mathematics
1 answer:
AleksandrR [38]3 years ago
7 0

Answer:

12 and -9

Step-by-step explanation:

12 x -9 = -108

12 + -9 = 3

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Recently, TWA reported an on-time arrival rate of 78.4%. Assume that a later random sample of 750 flights results in 630 that ar
WINSTONCH [101]

Answer:

Step-by-step explanation:

1. Null hypothesis: u <= 0.784

Alternative hypothesis: u > 0.784

2. Find the test statistics: z using the one sample proportion test. First we have to find the standard deviation

Using the formula

sd = √[{P (1-P)}/n]

Where P = 0.84 and n = 750

sd =√[{0.84( 1- 0.84)/750]}

sd=√(0.84 (0.16) /750)

SD =√(0.1344/750)

sd = √0.0001792

sd = 0.013

Then using this we can find z

z = (p - P) / sd

z = (0.84-0.784) / 0.013

z =(0.056/0.013)

z = 4.3077

3. Find the p value and use it to make conclusions...

The p value at 0.02 level of significance for a one tailed test with 4.3077 as z score and using a p value calculator is 0.000008254.

4. Conclusions: the results is significant at 0.02 level of significance suck that we can conclude that its on-time arrival rate is now higher than 78.4%.

5 0
3 years ago
An __________ is a mathematical sentence in which two sides are not equal and are separated with the symbols &lt;, &gt;, ≥, ≤
Artist 52 [7]

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Which of the following represents an equation of a line parallel to one whose equation is 2x + 8x = 18
Naya [18.7K]

Answer:

y=-4x+3

Step-by-step explanation:

it does not show the equations that are following

but the main thing you need to know is that when two lines are parallel they have the same slope

and do you mean 2x+8y=18 not x?

edit:

answer choices: y=-4x+3, y=8x-2, y=4x+7, y=-8x+9

2y+8x=18

first change that equation to slope intercept form to find the slope

2y = -8x+18 -> y = -4x+9

slope is -4

so the answer is y=-4x+3 because it also has a slope of -4

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3 years ago
HELP ASAP!!
Over [174]
The answer is c becuse there’s only 2 cs and 3 of the others
8 0
2 years ago
How much time woiuld a old car take to cover a distance of 39 miles at a speed of 13 miles/i hour ?
yulyashka [42]

Answer:

3 hours

Step-by-step explanation:

39 miles/ 13 miles per hour means 3 hours. SIMPLE!

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