Cho tam giác ABC vuông tại A có AH là đường cao. Chứng minh rằng :a)AB^2=HC. BC
b) AH^2=HB. AC
C)1/AH^2=1/AB^2+1/AC^2

Will mark brainliest with 20 points! the table shows how far object 1 traveled as a function of time. *time (seconds) - 2 4 6 8 *distance traveled (feet) - 18 36 54 72 the equation shows how far object 2 traveled in feet as a function of time in minutes. *f(x) = 10x which object traveled at a faster speed? justify your response.

1foot = 12 inches; 1 yard = 3 feet

Which expression is rational? 6. , square root two, square root 14, square root 49