Answer:
 
Step-by-step explanation:
To find the slope from two points you can use the following formula:
 
Now substitute the two sets of points  
Substitute the values like this:
 and
 and  
Now you will need to simplify the following expression:
 
Make sure that denominators are the same before substracting:
 
when you divide with a fractional number you only need to flip the second fraction over (find its reciprocal). Then just multiply:
 
 
        
             
        
        
        
Since this is a right triangle, you can use the pythagorean theorem,  , to find XY. Since we know that 15 and 17 are our legs and that XY is the hypotenuse, we can solve it as such:
, to find XY. Since we know that 15 and 17 are our legs and that XY is the hypotenuse, we can solve it as such:

In short, XY is √514, or 22.67 rounded to the hundreths, units long.
 
        
                    
             
        
        
        
12a=x
4a+6b=10
2a+3b=5
2a-4b=12
a-2b=6
2a+3b+1=a-2b
a+5b+1=0
a=-1-5b
2(-1-5b)+3b=5
-2-10b+3b=5
-2-7b=5
-7b=7
7b=-7
b=-1
-1-5*-1=a
-1+5=a
4=a
4*12=48
12a=48
Hope this helps :)
        
                    
             
        
        
        
Answer:
50.
Step-by-step explanation:
12 x 45 = 540. 45 + 5 = 50.