Ratios and Rates Express each phrase as a rate and unit rate.
(Round your answer to the nearest hundredth.)
Rate
Unit Rate
1) mowed 6 yards for $15.00
2) 5 inches of snow in 7 hours
3) 15 dollars for 7 books
4) 110 miles on 7 gallons of gas

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?