Answer:
Step-by-step explanation:
This is a special right triangle that has 30, 60 and 90 degress corners. Because it is a special triangle, it also has side length values which always consistent relationship with one another.
Side opposite the 30° angle: x
Side opposite the 90° angle: 2x
So, 
Then use Pythagorean theorem. 




Answer:
87
Step-by-step explanation:
Complementary angles add to 90 degrees
Let c be the complement
c + 3 = 90
Subtract 3 from each side
c+3-3 = 90-3
c = 87
259,200 seconds!!
hope this helps :)
Answer:
90 miles
Step-by-step explanation:
Let ori. speed = z
distance = speed × time
= z × 2
= 2z miles
distance = (z - 15) × 3
= (3z - 45)miles
2z = 3z - 45
z = 45mph
distance = 45 × 2
= 90 miles
distance = (45-15) × 3
= 90 miles
(Correct me if i am wrong)