The average (mean) of 90 numbers is 60, and the average of 60 numbers is 90. What is the average of all the numbers?

Average = 72

Step-by-step explanation:

Average of 90 nos. = 60

Total score = 90 x 60 = 5400

Average score of 60 nos is 90

Total score = 60 x 90 = 5400

Average of all nos

= (5400 + 5400) / 150 = 72

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below:

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^