Total time it takes to clean: 2 1/2 hours time per session: 1/4 hour how many sessions will it take to completely clean the room?

∠1 and ∠2 are complementary. ∠1=x°∠2=(3x+30)° select from the drop down menu to correctly answer the question. what is the value of x? . a.15 b.25 c.30 d.40 e.55

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²