If point 

 is on the unit ircle, then:

Since, the point is in the second quadrant, x is negative.
Thus, 

Part A:

Therefore, 

.
Part B:

Therefore, 
 
 
        
        
        
Answer:
72.5/8.9 = 8.15
33.2/1.2=27.67
74.3/7.9 = 9.41
35.5/3.2 = 11.09
28.1/3.7 = 7.59
Step-by-step explanation:
 
        
                    
             
        
        
        
Since he must not exceed 8 hours driving in a day:
Let the distance of the picnic be = x km.
Therefore  time for forward journey  =  x / 60
Return journey                                   =  x / 50
The total trip should not exceed 8 hours.
Therefore:              x / 60 + x / 50  <= 8.      LCM = 300
Taking LCM and multiplying on both sides:
                                5x  +  6x  <=  8(300)
                                       11x    <=  2400
                                           x    <=    2400/11
                                           x   <=  218.18
The picnic spot must be less than or equal to 218.18 km.
        
             
        
        
        
If you are putting them all in order from least to greatest it would be 0.42, 1.3, 1.36, 1.63, 3.47,3.74. But, if you are separating them the first set of three numbers you wrote would be ordered 1.3, 1.36, 1.63. Then, the second set would be ordered 0.42, 3.47, 3.74. Hope this helped!!!
        
                    
             
        
        
        
Answer:
x=2
x=-5
Step-by-step explanation:
You need to get everything on one side to have a quadratic equation:
x^2+6x-4 -(3x+6) = x^2+3x-10
All factors of 10 are 1*10 and 2*5.
5-2 = 3 and 5*-2 = -10
Factoring x^2+3x-10 gives us (x-2)(x+5)
x=2
x=-5