The table below shows the probability distribution of students in a high school with 1500 students. What is the expected value for the age of a randomly chosen student? Ages: 13 14 15 16 17 18
Prob: 0.01 0.27 0.30 0.25 0.16 0.01

What is the equation of a vertical line passing through the point (−5, −1)? y = −5 y = −1 x = −5 x = −1

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

The first floor of marcus’ house is 1,440 square feet. he will cover 1,033 square feet with wood and the rest with tile. a box of tiles will cover 11 square feet. how many boxes of tile does marcus need to buy to cover the floor?