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3 years ago

Error Analysis

Mathematics

1 answer:

aleksklad [387]3 years ago

6 0

The coefficient(s) of the expression is/are 7, 1

Use a comma to separate answers as needed.)

The constant(s) of the expression is/are 8

(Use a comma to separate answers as needed.)

What error might Jake have made?

OD. Jake did not include the coefficient 1.

Click to select your answer's

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3 years ago

Today the temperature is 0ﾟC the temperature dropped 12ﾟC from yesterday's temperature what was yesterday's temperature

IceJOKER [234]

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4 years ago

Find x in the proportion x:6= 25:5

Andrews [41]

Step-by-step explanation:

$\frac{x}{6} = \frac{25}{5} \\$

$\frac{x}{6} = \frac{5}{1} \\$

$x = 30$

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3 years ago

In a psychology class, 28 students have a mean score of 83.6 on a test. Then 25 more students take the test and their mean score

GalinKa [24]

Answer:

The new mean would be given by:

$\bar X_f = \frac{\sum_{i=1}^n X +X_1}{28+25}$

And replacing we got:

$\bar X_f = \frac{2340.8+ 1720}{28+25}= 76.6$

Step-by-step explanation:

We know that the original mean from the 28 students is given by:

$\bar X= \frac{\sum_{i=1}^{28} X_i}{28}= 83.6$

The sum of the values is:

$\sum_{i=1}^{28} X_i = 28*83.6 =2340.8$

And now we know that the new mean is 68.8 with the 25 new people so then the new mean would be given by:

$\bar X_1 = \frac{\sum_{i=1}^{25} X_i}{25} = 68.8$

The sum of the values is:

$\sum_{i=1}^{25} X_i = 25*68.8 =1720$

The new mean would be given by:

$\bar X_f = \frac{\sum_{i=1}^n X +X_1}{28+25}$

And replacing we got:

$\bar X_f = \frac{2340.8+ 1720}{28+25}= 76.6$

5 0

3 years ago

How many permutations can be made of the letters of the word "radar" when taken all at a time?

n200080 [17]

Slot method
5 letters
1st slot=5 options
2nd slot=4 options (1 went ot first slot)
3rd slot=3 options (1 went to 2nd)
4th slot=2 options
5th slot=1 option

5*4*3*2*1=120 ways

3 0

3 years ago

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