expresslmnop
contestada

The table shows the number of minutes spent doing different exercises. The mean spent exercising was 18.2 minutes. How many minutes were spent doing sit ups? (URGENT HELP) (ANSWER 4/11/19)

The table shows the number of minutes spent doing different exercises The mean spent exercising was 182 minutes How many minutes were spent doing sit ups URGENT class=

Respuesta :

mathstudent55

Answer:

15

Step-by-step explanation:

Call the unknown time x.

The mean is the sum of the numbers divided by the number of numbers.

There are 5 numbers.

(8 + 10 + 38 + x + 20)/5 = 18.2

(x + 76)/5 = 18.2

x + 76 = 91

x = 15

jcherry99

Answer:

Step-by-step explanation:

Add all the scores you do know

8  + 10 + 38 + 20 = 76

Now put in an ex for the situps.

76 + x

There are 5 subjects

(76 + x) /5 = 18.2

The average was 18.2

Multiply both sides by 5

5*(76 + x ) / 5 = 18.2 * 5      

Cancel the left combine the right.

76 + x  = 91

Subtract 76 from both sides

76 - 76 + x = 91 - 76

x = 15

                       

Otras preguntas