Simplify. your answer should contain only positive exponents.(x^3y^-2)-4

Which statements are true about additional information for proving that the triangles are congruent check all that apply

Kari plans to sample 20 people of a population that contains 100 students. she wants to determine how many people wake up before 6 a.m. which sample is the most random?

Sonia works at a sporting goods store. she earns $415 per week plus a 5.25% commission on her sales. one week, her sales are $2,200. what is her total income for the week?