Which expression is equivalent to 2(3g-+3)

The sum of two numbers is 12 and their difference is 18 what are the two numbers

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

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.