Alarge random sample of american students in seventh grade showed that 20%20\% 20% 20, percent of them were reading below grade level.
based on this data, which of the following conclusions are valid?
a.20% of all american students in seventh grade were reading below grade level.
b. 20% of this sample was reading below grade level, but we cannot conclude anything about the population.

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.

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?

32a³b² 8ab² simplify the following expression.