Please Answer it’s simple but today I’m not feeling like myself who can help me? Please

Can (2,3 and square root 10) be sides ona right triangle?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2