A neutral atom of helium has 2 protons and blank electrons

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?

Which system of linear inequalities is represented by the graph? !

What is the value with a place of tenths in 907.456 1) 0 2) 6 3) 4 4) 5