The base of an 11-foot ladder is 5 feet from a building. if the ladder reaches the flat roof, how tall is the building

The line containing the midpoints of the legs of right triangle abc where a(-5,5), b(1, 1), and c(3, 4) are the vertices.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Suzanne began a trip with 18 1/2 gallons of gas in the gas tank of her car if she hughes 17 3/4 gallons on the trip how many gallons does she have left once she finish the trip