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jekas [21]
3 years ago
12

HELP

Mathematics
1 answer:
Xelga [282]3 years ago
8 0

Answer:

21x^2+3x+12

Step-by-step explanation:

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An employee at a cellular phone store is doing inventory. The store
Aloiza [94]

Answer:

there are 48 iPhones and 23 Samsung

Step-by-step explanation:

3 0
3 years ago
The frequency distribution shows the number of registered motor vehicles for a random sample of 200 California households.
erastovalidia [21]

Answer:

1). Mean = 2.275

2). Median = 2 vehicles

Step-by-step explanation:

From the given table,

Number of vehicles (x)         Frequency (f)      (f)×(x)             Cumulative freq.

                  0                                    11                  0                           11

                  1                                     52                52                        63

                  2                                    66                132                      129

                  3                                    35                105                      164

                  4                                    19                  76                       183

                  5                                    12                  60                       195

                  6                                     5                  30                       200

                                                                          \sum (f\times x) = 455

Number of households = 200

Mean = \sum \frac{f.x}{n}

          = \frac{455}{200}

         = 2.275

Median = value of \frac{(n+1)}{2}th observation

             = value of \frac{201}{2}th observation

             = Value of 100.5th observation

             = Since 100.5th observation lies in the row of cumulative freq. = 129

             = 2

Therefore, median number of registered vehicles per California household

= 2 vehicles

6 0
3 years ago
A composite figure is made up of a triangular prism on top of a rectangular prism. Which of the following surface area equations
Aloiza [94]

In this problem the surface area of the composite figure is equal to the area of the base of the rectangular prism plus the lateral area of the rectangular prism, plus the area of the two triangular faces of triangular prism, plus the area of two rectangular faces of the triangular prism. we know that

5 0
3 years ago
Read 2 more answers
Sixty-three is 70% of what number?
Margaret [11]
<u>  70</u> =<u>63</u><u>
</u>100    ?
cross multiply 63 and 100= 6300 then divide by 70= 90
3 0
3 years ago
1. A five-number summary of a univariate data set is determined to be [10, 15, 25, 45, 85]. These data are to be used to constru
kompoz [17]

Answer:

A) I only

Step-by-step explanation:

median = 25

mean = 36

Plot for given distribution is shown in fig attached below. mean is shown with red block and median with green block. plot is skewed to the left and there is no outlier.

3 0
3 years ago
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