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zubka84 [21]
2 years ago
10

Find the LCD for the list of rational expressions. 2 7x +4 x2 + 5x - 14' x2 + 3x – 28

Mathematics
1 answer:
andre [41]2 years ago
7 0

the equation is made and the included values are indicated.

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Inessa ran 3 laps in 8 minutes. How long would it take her to run 10 laps at this pace? (This is proportions)
Degger [83]

Answer:

26.6 minutes

Step-by-step explanation:

Set up a proportion

3/8 = 10/x

cross multiply

3x = 80

x = 26.6

5 0
3 years ago
Which is greater? -5.7 or -5 2/5
AleksAgata [21]

Answer:

-5 2/5

Step-by-step explanation:

we know that 2/5 is 0.4 so

it is -5.4

-5.4 is greater than -5.7

3 0
2 years ago
Read 2 more answers
1. Suppose you have a variable X~N(8, 1.5). What is the probability that you have values between (6.5, 9.5)
Natalija [7]

Answer:

0.6826 = 68.26% probability that you have values in this interval.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

X~N(8, 1.5)

This means that \mu = 8, \sigma = 1.5

What is the probability that you have values between (6.5, 9.5)?

This is the p-value of Z when X = 9.5 subtracted by the p-value of Z when X = 6.5. So

X = 9.5

Z = \frac{X - \mu}{\sigma}

Z = \frac{9.5 - 8}{1.5}

Z = 1

Z = 1 has a p-value of 0.8413.

X = 6.5

Z = \frac{X - \mu}{\sigma}

Z = \frac{6.5 - 8}{1.5}

Z = -1

Z = -1 has a p-value of 0.1587

0.8413 - 0.1587 = 0.6826

0.6826 = 68.26% probability that you have values in this interval.

7 0
2 years ago
Which expression is modeled on the number line
Mice21 [21]

Answer:

D

Step-by-step explanation:

if you were to chose c you would find that to negatives make a positive and the first negative has to be there so d would be the best possible answer

7 0
2 years ago
If someone knows the answer that will be greatly appreciated :)
guajiro [1.7K]

a. \: 8 = 2 + 2a \: and \: 3 = a

Step-by-step explanation:

  • Set up equation as we know both weights are equal.
  • Subtract two from both sides and divide by 2 to isolate the variable a.
  • 3 = a
5 0
2 years ago
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