20) Simplify: 3ab(4b-ab) + 5b2(a2 + 2)

State whether weight is a function of height for the six students and explain. a. yes, height is a function of weight because two students weigh 165 pounds but have different heights. b. no, height is not a function of weight because two students weigh 165 pounds but have different heights. c. yes, weight is a function of height because for each value of height there is one corresponding value of weight. d. no, weight is not a function of height because there is not enough data to determine a function.

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

Me. i can't figure out this question. give an explanation too. .