(4x+1)+(5x-4)+E=180, find E

(4x + 1) + (5x + 4) + E = 180.

Simplify: Combine the x values

4x + 5x = 9x.

Now add 4 + 1 = 5.

So far we have; 9x + 5 + E = 180.

180 - 5 = 175.

9x = 175

175/9 = 19.4 repeated. X = 19.4 repeated.

Substitute in the value we have so far.

(4 x 19.4 repeated + 1) + (5 X 19.4 repeated + 4) = 180

So, E must be 0 for this equation to work.

Step-by-step explanation:

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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

step-by-step explanation: