#9. There are 180 degrees in a triangle. We already know two of the sides which added together make 112. Then we do, 180-112=68
#10. We do the same process. 90 + 60 = 150
150-180= 30
#11. To find whether or not any three numbers can make a triangle, two of the numbers must equal more than the remaining number. But this has to be the case for any combination. 6+7=13. 13 is larger than 11. So yes it can.
#12. 8+2=10 which may be bigger than 6 but, 6+2=8. Which is equal to 8. So no, it cannot make a triangle.
I’m still working out the first question
        
             
        
        
        
<u>Given </u><u>:</u><u>-</u>
- The slope of the line through points (3,y) and (4,10) is 7 .
<u>To </u><u>Find</u><u> </u><u>:</u><u>-</u>
<u>Solution</u><u> </u><u>:</u><u>-</u>
As we know that the slope of the line is difference of ordinate divided by the difference of absicca as ,
 m = y -10 / 3 - 4
 m = y -10 / 3 - 4
 7 (-1) = y -10
 7 (-1) = y -10 
 -7 = y -10
 -7 = y -10
 y = 10 -7
 y = 10 -7
 y = 3
 y = 3
<u>Hence</u><u> the</u><u> required</u><u> answer</u><u> is</u><u> </u><u>3.</u>
 
        
             
        
        
        
Answer:
Step-by-step explanation:
I know that the two means are are 11.28 and 12. 
I could be wrong but I did the math 5 times. 
 
        
                    
             
        
        
        
Answer:
You use the formula (y to the second power minus y to the first power minus the same formula with the two different points
Step-by-step explanation:
 
        
             
        
        
        
To what?? Please explain.