Identifying a Function from an Equation
Identify which of the following equations represent functions. Select all that apply.
y = 4x + 13
x=5
x + y2 = 16
y = 31-x-1

Asimple random sample of size nequals14 is drawn from a population that is normally distributed. the sample mean is found to be x overbar equals 70 and the sample standard deviation is found to be sequals13. construct a 90% confidence interval about the population mean

Tickets to a science exposition cost $5.75 each for studentd and $7.00 for adults.how many students and adults went if the ticket charge was $42.75

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?