If y varies directly as x and y is 20 when x is 4 what is the constant of variation for this relation

Acharity is conducting a raffle, and it sells one ticket each to 35 women and 21 men. if 5 winners are randomly selected, what is the probability that they are all men? round to five decimal places. 0.00533 0.06268 0.09537 0.07776

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?