Convert зcis 180° to rectangular form.
а. -3
в. -3i
с. з
d. зі.

-3

Step-by-step explanation:

means

What is the -coordinate value that corresponds to . That value is -1.

What is the -coordinate value that corresponds to . That value is 0.

So this implies .

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