What is is the measure of one angle of a non-regular pentagon

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10