$256.75
Add $178 + $98.25= $276.25
Then $276.25 - $19.50 = $256.75
        
             
        
        
        
-4 x 9= -36 and the when you add 5 to -36 you get -31. Hope this helps
        
             
        
        
        
The second term would be -3f^3 because when in descending order it is 
6f^4 - 3f^3 - 2f^2 + 9f 
        
             
        
        
        
The values of a and b are 1/4 and 1/5 respectively
<h3>How to determine the true statement?</h3>
The function is given as:
16x^2 - 25y^2 = 1
The above function is a horizontal hyperbola.
A horizontal hyperbola that passes through the origin is represented as:

Rewrite 16x^2 - 25y^2 = 1 as

By comparison, we have:


Solve for  a and b


Hence, the values of a and b are 1/4 and 1/5 respectively
Read more about hyperbola at:
brainly.com/question/27799190
#SPJ1