Subtract a number from the next number.
39 - 45 = -6
Answer: B. -6
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
37 is prime, so it's not possible to reduce/simplify 37/80.  37/80 is the ratio of two integers.  We could, of course, use a calculator to find the decimal equivalent:  0.4625, but this is not more accurate than the ratio 37/80.
 
        
             
        
        
        
Answer:
$2467.50
Step-by-step explanation:
987 = ( 1 - 0.6 )x
987 = 0.4x
x = 2467.5
 
        
             
        
        
        
Answer:
k = -1/240
Step-by-step explanation:
to evaluate the value of k in the expression 1/3k+80=1/2k+120
we have
1/3k+80=1/2k+120
collect the like terms for easy evaluation
1/3k - 1/2k = 120 -80
1/3k - 1/2k = 40 
find the lcm 
2 - 3/6k = 40 
-1/ 6k = 40
cross multiply
6k  x  40  = -1
240k = -1
divide both sides by 240
240k/240 = -1/ 240
k = -1/240
therefore the value of k in the expression 1/3k+80=1/2k+120 is equals to -1/240