Which of these sentences is always true for a parallelogram?

all sides are congruent.

all angles are congruent.

the diagonals are congruent.

opposite angles are congruent.

The mean finish time was 185.52 with a standard deviation of 0.327 minute. the winning car driven by chris finished in 185.13. the previous year race had a mean finish time of 110.3 with a standard deviation of 0.106. the winning car that year driven by karen finished in 110.13 minutes. find their respective z-scores. chris - z-score karen “- z-score

The value of cos 30° is the same as which of the following?

Factor the polynomial expression x6 – x3 – 20