Of 30 students. exactly 15 are athletes, 10 are on student council, and 8 are in the band. Only 3 athletes are in the band and only 4 nonathletes are in the band. In the group, a person who is an athlete may be in the band and in the student council but not in one or the other alone. How many of the 30 students are not athletes in student council, or band?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Graph red beads cost $1 an ounce and gold beads cost $3 an ounce. juanita wants to purchase a 12-ounce mixture of red and gold beads that she can sell for $2 an ounce. the solution of the system shows the number of beads needed for juanita to break even. x + y = 12, x + 3y = 24 how many ounces of red beads will juanita buy to break even? how many ounces of gold beads will she buy?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?