Answer:
x=20
Step-by-step explanation:
(triangle angles must add up to 180º)
2x+10+2x+90=180
4x+100=180
4x=80
x=20
Hello! your answer would be infinite solutions, or b! hope this helped! ;)
Answer:
Step-by-step explanation:use slope formula = rise /run = 
(x1, y1) = coordinates of first point in the line
(x2, y2) = coordinates of second point in the line
first point (c,d) second point (a,b)