Miss piper randomly selects 3 students to form a party-planning committee for classroom birthdays. if there are 30 people in the class, how many groups can be formed?

Nell has a sales clerk job that pays $12 per hour for regular gas work hours. she gets double time for any hours over 40 that she works in a week. how many hours did nell work if her weekly pay was $744

Which product is positive a is 2/5 -8/9 -1/3 -2/7 b is -2/5 8/9 -1/3 -2/7 c is 2/5 8/9 1/3 -2/7 d is -2/5 -8/9 1/3 2/7

Solve 2x+y=3 x+y=5 in substitution method