Z varies directly with x and inversely with y. When x = 6 and y = 2, z = 15. What is the value of z when x = 4 and y = 9?

45

20/9

72/5

135

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

2x minus y equals 6, x plus y equals negative 3

Question 1 of 10 2 points different groups of 50 graduates of an engineering school were asked the starting annual salary for their first engineering job after graduation, and the sampling variability was low. if the average salary of one of the groups was $65,000, which of these is least likely to be the average salary of another of the groups? o a. $64,000 o b. $65,000 o c. $67,000 o d. $54,000