Please help me out! It’s urgent!

What value of x is in the solution set of –5x – 15 > 10 + 20x?

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

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