5x+2y=-4
-x+2y=8
solve the system

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?