Ninth grade math problems include: Solve |x-1| > 3. Identify the intersection of the intervals [0; 3] and ] 0; 2]. Work out the set of solutions for the inequation (- x – 3) (x+1) ≤ 0. Calculate sin (π/3). Determine if M (1; 2), N (3; 5), and O (4; 8) are on a line.
In one class, 10 boys are between 1.5 meters and 1.60 meters tall, 16 boys are between 1.6 meters and 1.7 meters tall and 6 boys are between 1.7 meters and 1.8 meters tall. What is the average height of the boys?
If 90 percent of 90 girls and 80 percent of 110 boys arrive in school on time, how many pupils are late?
John positions a rocket that’s 3 feet 6 inches tall on top of a launch pad that’s 1 foot 8 inches tall. Calculate the height of the entire set up.
A ninth grader should be able to master numbers, analyze, order and find solutions for multistep problems involving rational and irrational numbers. They should use knowledge on measurement to accurately solve problems involving two- and three-dimensional figures, such as distances and angles. They should grasp geometry and probability. An understanding of algebra should cover linear, polynomial and trigonometric functions.