Find the lengths of AD, EF, and BC in the trapezoid below.

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

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 by completing the square. x^2+2x=17