Austin4094

12.05.2021 • 

Mathematics

Here are the shopping times in minutes) for each of fifteen shoppers at a local grocery store. Shopping times
(in minutes)
33
36
32
20
27
24
34
29
31
26
37
18
24
24
35
Send data to calculator
(a) Complete the grouped frequency distribution for
the data. (Note that the class width is 5.)
(b) Using the classes from part (a), draw the frequency
polygon for the data. Note that you can add or remove
classes from the figure. Label each class with its
midpoint.
Shopping times
(in minutes)
17.5 to 22.5
Frequency
0
Frequency
6-
22.5 to 27.5
27.5 to 32.5
5-
4-
3
2-
1-
OLA
32.5 to 37.5
Shopping times in minutes)
Х
5
?

Ответ:

tashatyron24pejls0

02.12.2021

Mathematics

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19

Step-by-step explanation:

When 2 chords intersect then the product of the parts of one chord equal the product of the parts of the other chord, that is

12(x - 7) = 4(x + 3) ← distribute parenthesis on both sides

12x - 84 = 4x + 12 ( subtract 4x from both sides )_

8x - 84 = 12 ( add 84 to both sides )

8x = 96 ( divide both sides by 8 )

x = 12

Thus

12 + x - 7 = 12 + 12 - 7 = 17

4 + x + 3 = 4 + 12 + 3 = 19 ← longer chord

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