If rst ≅ npq, m∠r = -7x +9, m∠n= -10x, find m∠r and m∠n

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 statement accurately explains whether a reflection over the x-axis and a 180° rotation would map figure acb onto itself?

Ateacher brought a pack of 17 batteries . each calculator uses 3 batteries . how many calculator can the teacher fill with batteries