Answer:
missing side length = 61
Step-by-step explanation:
find Pythagoras Theorem rule
a² + b² = c² ..........where a is opposite, b is adjacent and c is hypotenuse
11² + 60² = c²
c = √3721
c = 61
2:5 = 2/5
2/5 x 150
2 x 30= 60km
slope: -1
y intercept: (0, 20/3)
y= 2x-5
I just plugged the information into the formula.