Find the equation of the line which passes through (2,1) and (-1,10), y=-3x+7
y =2x+7
y= 3x-7
y= -2X-7

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle