cho tam giác ABC vuông tại A. vẽ đường cao AH, lấy D thuộc AC. E là hình chiếu của A trên BD. CM:a, BE. BD=BH. BC b, góc BEH bằng góc C c. góc BAH=góc BEH

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m

Which graph represents the equation y =4x

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?