1) 5n2 = 8n + 21
how do you solve it

Janet drove 300 miles in 4.5 hours. write an equation to find the rate at which she was traveling

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

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review