How do i solve this?

every 3 days seth goes to the gym. brian, his brother, goes every 5 days. what day will they both go to the gym?

a.) the 15th day
b.) the 20th day
c.) the 12th day

Which of the following are accepted without proof in a logical system? check all that apply.

Plz a. s. a. p.the table shows the number of male and female contestants who did not win a prize. what is the probability that a randomly selected contestant won a prize, given that the contestant was female? write the probability as a percent. round to the neares tenth, if needed.

Which inequality is equivalent to -3x < -12? x < 4 , x < -4 , x > 4, x > -4