Select the correct answer. Which of these sentences is always true for a parallelogram? OA. All sides are congruent. O B. All angles are congruent. O C. The diagonals are congruent. OD. Opposite angles are congruent.

Iwill give you ! what is the measure of ∠v ?

Simplify. −4x^2 (5x^4−3x^2+x−2) −20x^6−12x^4+8x^3−8x^2 −20x^6+12x^4−4x^3+8x^2 −20x^8+12x^4−4x^2+8x −20x^6+12x^4+4x^3−8x^2

Is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis.