What is 3x-11=22 can you answer quick

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

20 solve 2(4 x + 3) < 5 x + 21. a) { x | x < 9} b) { x | x > -5} c) { x | x > -9} d) { x | x < 5}

Abox holds 500 paperclips. after a week on the teacher's desk 239 paperclips remained. how many paperclips were used?