$90 because 200-10=180 and divide 180 by 2 which is 90.
B - check your answers and present the solution
1. x= 3/Y as a fraction btw
2. Same thing
The slope is 4.
To find the perpendicular slope, you use the negative reciprocal of the slope you already have. Since the original slope is -1/4, you flip -1/4 to get -4. You then find the negative of -4 to get 4
