10. If a, b, c are in H. P., prove that
bc/b+c

Driving 75 mph, it takes alicia 2 hours to reach the airport to go on a vacation. it then takes her 4 hours to get to her destination with the jet traveling at a speed of 400 mph. how many miles does alicia travel to get to her destination?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

Def rotates 90 clockwise about point a to create d’ e’ f’. therefore, which equation must be true ?