Which is a quadratic function? a. c(x)=6x+3x^3. b. d(x)=x-8x^4. c. p(x)=-5x-x^2. d. k(x)=2x^2+9x^4

1. the following set of data represents the number of waiting times in minutes from a random sample of 30 customers waiting for service at a department store. 4 5 7 10 11 11 12 12 13 15 15 17 17 17 17 17 18 20 20 21 22 22 23 24 25 27 27 31 31 32 a. determine the number of classes and class interval.

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.