Answer:
-67
Step-by-step explanation:
 
        
             
        
        
        
Answer:22.36 mi/hr
Step-by-step explanation:
Given
water in a river moves south at 
motorboat travels due to east at a speed of 
Velocity of boat relative to the moving water 


Magnitude of 


 with the x axis.
 with the x axis.
 
        
             
        
        
        
Just sub x in with 5.
So 6(5)^3+8(5) = 6 (125) + 40 = 750 + 40 = 790.
So 790
        
                    
             
        
        
        
Hello there!

Explanation:
↓↓↓↓↓↓↓↓
First you had to multiply by y from both sides of the equations.

Simplify it should be the correct answer.

Answer⇒⇒⇒⇒⇒x=hy-ky; y≠0
Hope this helps!
Thank you for posting your question at here on Brainly.
Have a great day!
-Charlie