Answer:
81
Step-by-step explanation:
Assuming the ramp is against a wall or building at a 90 degree angle, then the 3 angles formed by the triangle within the ramp and wall are 9 +90 + x = 180 so 99 + x = 180 so x=81
42 3/4 I think
because if you simplified 342/8 it will be 171/4. so if you simplified that it'll get you to 42 3/4