You earned the following scores on five math test: 96 92 80 91 and 86 you want to have an average of at least 90 after you take the sixth test. write and solve an inequality to find the possible score on your sixth test in order to meet your goal

its c or d   take a lucky guess my dude

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