Find the missing length indicated​

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

The polynomial 10x3 + 35x2 - 4x - 14 is factored by grouping. 10x3 + 35x2 - 4x - 14 5x )-20 what is the common factor that is missing from both sets of parentheses?

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.