If carol earnsx dollars a week for 3 weeks and y dollars a week for 4 weeks, what is the average number of dollars per week that she earns?

The number of days in w weeks is

Find the ratio of : 3 weeks and 4 days to 5 weeks and 2 days.

Ken is working this summer as part of a crew on a farm. He earned $8 per hour for the first 10 hours he worked this week. Because of his performance, his crew leader raised his salary to $10 per hour for the rest of the week. Ken saves 90% of his earnings from each week. What is the least number of hours he must work the rest of the week to save at least $270 for the week?

If the average temperature of first four days of the week was 39oC and the average temperature of the week was 40oC , then what was the average temperature of the last three days of the week? 39. 9oC (b) 40. 9oC (c) 41. 3oC (d) 42. 1oC

If A is the set of days in a week , then set A is