Two sections of a class took the same quiz. section a had 15 students who had a mean score of 80, and section b had 20 students who had a mean score of 90. overall, what was the approximate mean score for all the students on the quiz? a. 84.3b. 85c. none of these d. cannot be determined

Given f(x) = 2x^2- 5x+1, determine the function value f(2). do not f(x) = in your answer

Find the difference (8ab+a+2) - (3ab+6)

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)