Five teachers were hired at oakdale middle school at the beginning of the 2005 school year. the performance of each teacher was rated by the principal at the conclusion of each school year. the performance ratings are charted below. use this information to answer the question.

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

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?

You can ride your bike around your block 6 times and the whole neighborhood 5 times in 16 minutes. you can ride your bike around your block 3 times and the whole neighborhood 10 times in 23 minutes. how long does it take you to ride around the neighborhood?