What word phrase can you use to represent "5x + 2"?

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 of those sequences is a geometric sequence

5,600 x 10^3 = a) 560 b) 5,000,600 c) 5,600,000 d) 56,000