The sum of the m numbers divided by m (which is the average) equals n^2. Then, the sum of the m numbers equals mn^2.
The sum of the n numbers divided by n (which is the average) equals m^2. Then, the sum of the n numbers equals nm^2.
The average of m+n numbers which is the sum of the m numbers plus the sum of the n numbers divided by (m+n) equals (mn^2+nm^2)/(m+n). This is mn(n+m)/(m+n). Then the factor (m+n) can be ruled out and the result is mn.
1. -3x + -6
2. -3x + 9
3. 2x - 6
4. -2x + 6
here u go
7.675 inches of rain was the total amount in the two weeks
2r+7+2n+n2
Because I combined the ones with like terms.
