It will be right angle triangle.  The two vectors beginning at the same vertex
of a triangle are <2,3> and <-3,2> is classified as right-angled
triangle. It is classified as a right-angled triangle because the dot product
of the vectors are 0.
 
        
             
        
        
        
C. "David's equation is correct, because their spending will be multiplied by the number of months and then subtracted from their savings"
they are technically saying "Look we have 12,350 to use. How long (y) will the savings (12,350) last after using 240 each month (x)
so the amount they use *PER* month gets subtracted from the savings because they are using that money to pay with
Hope this helps :)
        
             
        
        
        
Use the slope-intercept y=mx+b to find slope
Slope=m
M=3
        
                    
             
        
        
        
Both are equal y. So you can set them equal to each other
9x+13=2x+48
Subtract 2x from both sides
7x+13=48
Subtract 13 from both sides
7x= 35
X=5
        
             
        
        
        
Answer:
y= -1+- i √79/4
Step-by-step explanation: Here is the answer ^^