Atrain goes 10 miles per hour. how far does it travel in 4 hours

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

Average acceleration: i have no idea how to do this.

Write the pair of fractions as a pair of fractions with a common denominator