PLEASE HELP DUE IN 15 lines AD and BE intersect at point C, as shown. create an expression that represents the measure of the angle DCE in terms if X

part 2 of question: using your expression, solve for the missing value of X if DCE was 120 degrees.

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:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.

7

step-by-step explanation:

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce