"in 2000, the u. s. population was 281 million people. in 2008, it was 305 million. what was the rate of population change per year? " (what equation do i need to do? you can answer the question, but i need to show work as well. )

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

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

Solve the equation x/4 - 5= -8 -27 -12 -7 12