A collection of 8 backpacks has a mean weight of 14 pounds. A different collection of 12 backpacks has a mean weight of 9 pounds. What is the mean weight of the 20 backpacks?

0.1235

Step-by-step explanation:

Divide 14 and 8 and also divide 12and 9 then u take those two answers and add them up and you divide that answer by20

11

Step-by-step explanation:

To calculate total weight of 8 backpacks. You multiply 8*14=112

To calculate total weight of 12 backpacks is 108 pounds. 12*9=108

Next, you have to calculate the total weight of the whole 20 backpacks 112+108=220

Lastly, you find the mean weight of 20 backpacks. So you divide 220 by 20.

11 pounds

Hope this helped!

first option

a function is a relation in which an input is paired with exactly one output.

so, let's find the right answer.

in our first option, our inputs are january, february, and march. the outputs are 30, 28, and 25. each input has it's own output. this is correct!

our second option we know is incorrect, because ms. valverade has two outputs, dogs and cats. this is not a function.

our third option is incorrect as well. the yellow square has two ouputs, the square and the triangle.

lastly, in our fourth option, we see the number 7 two times with a different output. therefore, this is not a function.

remember: each input must be paired with only one output!

goog may have it for you