What do the angles in a quadrilateral add up to?*

A quadrilateral is a shape with 4 sides. for any quadrilateral ,we can draw a diagonal line to divide it into two triangles.Each triangle has an angle sum of 180 degrees.Therefore the total angle sum of the quadrilateral is 360 degrees.

Step-by-step explanation:

360

Step-by-step explanation:

sum of anlges= (n-2) *180 where n is the no of sides

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