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Hi everyone! Can anyone help me with some questions???? sad

 

1. Alex scores the following points during the 5 rounds of the game.

 

154, 190, 143, 180, 125

What must he score in the next round so the mean for all 6 games is at least 160?

 

A. 158 points

B. 160 points

C. 168 points

D. 182 points

 

2. The table shows the number of cars of a certain type sold by 25 dealers in the last month. Find the value of x and draw a dot plot to represent the data. Find the total number of cars sold by the 30 car dealers.

-Don't worry about the dot plot! :)-

Table:

Number of Cars:                    Number of Dealers:

2                                            2

3                                            3

4                                            4

5                                            5

6                                            x

7                                            2

8                                            1

9                                            1

10                                          2

 

A. 142 cars

B. 129 cars

C and D are the same answers, just different dot plots :)

 Sep 8, 2015

Best Answer 

 #2
avatar+129849 
+5

Here's (1)

 

 [154 + 190 + 143 + 180 +125  + x ]  / 6 =   160      simplify

 

[792 + x ] / 6    = 160      multiply both sides by 6

 

792 + x   = 960      subtract  792 from both sides

 

x = 168  =  Answer C

 

 

 

cool cool cool

 Sep 8, 2015
 #1
avatar
+1

1. Would be A, because mean is adding up all the numbers then dividing it by how many there are.

Ex. 154 + 190 + 143 + 180 + 125 = 792 

Then divide by 5 since there is 5 numbers, 792/5 = 158.4 then round to the nearest tenth so 158.

 Sep 8, 2015
 #2
avatar+129849 
+5
Best Answer

Here's (1)

 

 [154 + 190 + 143 + 180 +125  + x ]  / 6 =   160      simplify

 

[792 + x ] / 6    = 160      multiply both sides by 6

 

792 + x   = 960      subtract  792 from both sides

 

x = 168  =  Answer C

 

 

 

cool cool cool

CPhill Sep 8, 2015
 #3
avatar+129849 
+5

Number (2)  is confusing....are there 25 dealers or 30  ???

 

Cars   Dealers   Total

2          2               4

3          3               9

4          4             16

5          5             25

6          x             ??

7          2             14

8          1               8

9          1               9

10        2             20

 

Without taking "x" into cosideration, 105 cars have been sold by 20 dealers

 

If there are 25 dealers, x = 5 and the number of cars sold = 135

 

If there are 30 dealers, x = 10  and the number of cars sold = 165

 

 

cool cool cool

 Sep 8, 2015

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