What is the value of x in the solution to the following system of linear equations {y = x - 1 { y = 2x +1

-2

Step-by-step explanation:

Equate the expressions for y. This gives ...

... x - 1 = 2x + 1

Add -1-x to get ...

... -2 = x . . . . your value of x

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