You could do this in two ways, you could either subtract immediately or convert the time given in hours into minutes
STEP 1:
 8:10
- 7:40
which will give 0:30
STEP 2:
8 hours 10 minutes into minutes is 
(8 * 60) +10 = 490 minutes
7 hours 40 minutes into minutes is 
(7*40) + 40 = 460 minutes 
490 - 460
= 30minutes
        
                    
             
        
        
        
(2k² + 5k - 6)(3k - 1)
(6k³ - 2k² + 15k² - 5k - 18k + 6)
6k² + 13k² - 23k + 6
Use the FOIL method to simplify the problem.
(FOIL stands for first outer, inner, last)
        
             
        
        
        
   15      /      40             =    .375
total #      total #
of girls      of students
.375 = 37.5%
15/40 as a fraction ---> simplify ---> 3/8
        
             
        
        
        
Answer:
5
Step-by-step explanation:
? x 2 = 10
      /2     /2
? =5
 
        
                    
             
        
        
        
Answer:
A. 1
Step-by-step explanation:
I see only one red function line in the graph. this line represents the simple function y = 1, for x in the interval [-2,1].
the domain of a function defines the possible values for x, and the range of a function defined the possible values for y.
this function has only one possible value for y : 1
so, only A applies.