Keystone Middle School has twelve sixth-grade classes. Three of the classes have both advanced math and advanced science. What percent of the sixth-grade classes have both advanced math and science?

Emma will roll two number cubes labeled 1 through 6. she will record the sum of the two numbers after each roll. she will roll the two cubes 540 times. how many times should emma expect the sum to equal 5?

If the graphs of the linear equations in a system are parallel, what does that mean about the possible solution(s) of the system? a. there are infinitely many solutions. b. there is no solution. c. there is exactly one solution. d. the lines in a system cannot be parallel.

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