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which of the following expressions is not in its simplest form?
m + 3 n + 6 mn - 4
9 m + 7 n - 6 mn + 4
7 m - 9 n - 6 mn + 4
9 m + 7 n - 6 mn + 4 m

9 m + 7 n - 6 mn + 4 m

Step-by-step explanation:

m + 3 n + 6 mn - 4 for this expression , it is already in its simplified form as we can not add any term together because they are not have the same variables.

9 m + 7 n - 6 mn + 4 this also is already simplified

7 m - 9 n - 6 mn + 4 the same thing with this

9 m + 7 n - 6 mn + 4 m this particular can still be further simplified because we have 9m and 4m having the same variable and we can therefore add them together , the simplified form of the expression will be

13m + 7n - 6mn

answer: 204

step-by-step explanation:

we are told that the revenue is

x⋅(4080−10x)=−10x^2+4080x

this is a quadratic function, so to maximize it we should find the x-value of its vertex. recall that the x-value of the vertex of the parabola ax^2+bx+c is given by the formula −b/2a.

so in this case, we have a=−10 and b=4080, so the x-value of the vertex is

−b/2a= −(4080)/2(−10)=204