Which statements prove that a quadrilateral is a parallelogram? select each correct answer.   quadrilateral defg has opposite angles that are congruent.  quadrilateral defg has diagonals that bisect each other.  quadrilateral defg has only one set of opposite sides that are congruent.   quadrilateral defg has only one set of consecutive angles that are supplementary.'

- Statement 1 and Statement 2

Explanation:-

Properties of a parallelogram:-

Thus, statements 1 and 2 are the correct answer to prove that a quadrilateral DEFG is a parallelogram.

step-by-step explanation:

kjswgdkxg

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