Which of these statements describe properties of parallelograms? check all that apply.

a. diagonals bisect each other.
b. opposite angles are parallel.
c. opposite angles are congruent.
d. opposite sides are parallel.
e. consecutive angles are supplementary.
f. adjacent sides are congruent.

What is the value of x in the equation 1.5x+4-3=4.5(x-2)?

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!