To write a ratio as a fraction, we simply take the first number in the ratio and make it the numerator while taking the second number in the ratio and making it the denominator. 
Because we want the ratio of engines to box cars, our ratio should be:
number of engines/number of box cars 
When we substitute in our respective values, we get:
4/18
To simplify this ratio, we have to find the GCF, or greatest common factor of the numerator and the denominator, which in this case is 2. To simplify, we divide both the numerator and the denominator by the GCF, as follows:
4/2 / 18/2 
When we simplify, we get:
2/9 
Therefore, your answer is 2/9. 
Hope this helps!
        
             
        
        
        
Answer:
x=180-x
2x=180
x=90
Step-by-step explanation:
 
        
             
        
        
        
<h3> - - - - - - - - - - - - - ~<u>Hello There</u>!~ - - - - - - - - - - - - -
</h3>
➷Simply multiply by 2:
3 x 2 = 6
It would be 6 units 
➶Hope This Helps You!
➶Good Luck :)
➶Have A Great Day ^-^
↬ Hannah ♡
 
        
        
        
Answer:
If 30 unicorns out of 300 walk away then it will be 300-30=270 unicorns left.
If 50 dragons fly away out of 200 then it will be 200-50=150.
Therefore there are 270 unicorns and 150 dragons left.
I hope this helps you...Thank you...
 
        
             
        
        
        
9514 1404 393
Answer:
   24 feet
Step-by-step explanation:
The side adjacent to the angle is given, and the hypotenuse of the triangle is the unknown. The cosine relation applies:
   Cos = Adjacent/Hypotenuse
   hypotenuse = ladder length = (5 ft)/cos(78°) ≈ 24.0 ft
The ladder is about 24 feet long.