Ms. Ingham took 21 pens from a drawer to distribute to the class. If 77 pens remain in the drawer, how many pens were originally in the drawer?

What is the y-intercept of the line given by the equation

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x

People end up tossing 12% of what they buy at the grocery store. assume this is the true population proportion and that you plan to take a sample survey of 540 grocery shoppers to further investigate their behavior. a. calculate the mean and the standard error for the sample proportion p. b. describe the sampling distribution of p in part a. draw a graph of this probability distribution with its mean and standard deviation. what is the probability that your survey will provide a sample proportion more than 15%? c. d. population proportion? what is the probability that your survey will provide a sample proportion within + 0.03 of the