Sum of 8n-n^2+12 and 7-n^2-10n

-2n^2-2n+19

Step-by-step explanation:

To find the sum of 8n-n^2+12 and 7-n^2-10n

We collect like terms

-n^2-n^2+8n-10n+12+7

-2n^2-2n+19

x = 25/2304

step-by-step explanation:

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: