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liberstina [14]
3 years ago
7

Which is a factor of 21? 4 3 6 5

Mathematics
2 answers:
arsen [322]3 years ago
3 0

Answer:

3

Step-by-step explanation:

Using listing:

1 \times 21 = 21

3 \times 7 = 21

No other factors are possible.

Hence, 1, 3, 7 and 21 are factors of 21.

Nadusha1986 [10]3 years ago
3 0

Answer: 3

Step-by-step explanation:

3 is the only number you can multiply to get 21. Example 3x7=21

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In Cary’s basketball career, he’s made 80% of his free throws, plus or minus 5%. If he attempts 200 free throws this season, wha
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Answer: 150-170 free throws

Step-by-step explanation:

200 times 80% or .8 will give you 160

5% of 200 is 10 so add and subtract that to/from 160 and you'll get your range

4 0
3 years ago
Fifty pro-football rookies were rated on a scale of 1 to 5, based on performance at a training camp as well as on past performan
son4ous [18]

Answer:

(a-1) 22 rookies receiving a rating of 4 or better.

(a-2) 14 rookies received a rating of 2 or worse.

(b-1) Constructed below in explanation.

(b-2) 8% of total rookies received a rating of 5.

Step-by-step explanation:

We are provided the rating of Fifty pro-football rookies on a scale of 1 to 5 based on performance at a training camp as well as on past performance.

The frequency distribution constructed is given below:

 Rating          Frequency

     1                       4

     2                     10       where ranking of 1 indicate a poor prospect whereas

     3                     14         ranking of 5 indicate an excellent prospect.

     4                     18

     5                      4

(a-1) Rookies receiving a rating of 4 or better = Rating of 4 + Rating of 5

       So, by seeing the frequency distribution 18 rookies received a rating of

         4 and 4 rookies received a rating of 5.

Hence, Rookies receiving a rating of 4 or better = 18 + 4 = 22 rookies.

(a-2) Number of rookies received a rating of 2 or worse = Rating of 2 +

                                                                                                 Rating of 1

     So, by seeing the frequency distribution 10 rookies received a rating of

      2 and 4 rookies received a rating of 1.

Hence, Rookies receiving a rating of 2 or worse = 10 + 4 = 14 rookies.

(b-1) Relative Frequency is calculated as = Each frequency value /

                                                                         Total Frequency

   Rating        Frequency(f)        Relative Frequency

     1                       4                          4 / 50 = 0.08

     2                     10                         10 / 50 = 0.2

     3                     14                          14 / 50 = 0.28

     4                     18                          18 / 50 = 0.36

     5                   <u>   4    </u>                       4 / 50  = 0.08

                     \sum f<u>= 50 </u>                

Hence, this is the required relative frequency distribution.

(b-2) To calculate what percent received a rating of 5 is given by equation :

            <em>  x% of 50 = 4 </em> {Here 4 because 4 rookies received rating of 5}

         x = \frac{4*100}{50} = 8% .

Therefore, 8% of total rookies received a rating of 5.

5 0
3 years ago
The las answer is Center E and scale factor 1/4 pleaseee helpp
hoa [83]
<h3>Answer: D) center E, scale factor 1/4</h3>

======================================

Explanation:

Point E is the center of the dilation (we can think of this as the origin point). This is because point E is in the same exact location as point E'. This is a fixed point. The other points move.

To find the scale factor, divide E'F' over EF

scale factor = (E'F')/(EF)

scale factor = 2/8

scale factor = 1/4

Keep in mind that EF = EF'+F'F = 2+6 = 8.

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3 years ago
Rationalize the denominator of the following expression and simplify:
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To "rationalize the denominator" is another way to say, getting rid of that pesky radical at the bottom.

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4 0
3 years ago
Help me simplify 15.6 over -3 plz
Assoli18 [71]
It equals -5.2........
5 0
3 years ago
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