Answer:  The cost of 7 roses and 8 petunias is $41.
Step-by-step explanation:
Given, Bethany sells roses and petunias. The expression 
, gives the cost (in dollars) of r roses and p petunias.
Now  to find the cost of 7 roses and 8 petunias , put r= 7 and p= 8 in the above expression , we get

Hence, the cost of 7 roses and 8 petunias is $41.
 
        
             
        
        
        
Answer:
6x-4y=24
Step-by-step explanation:
From the graph, there are two intersections to be found one at (4,0) and another at (0,-6)
Now,
slope,m= y1-y2/x1-x2
=0+6/4-0
=3/2
The equation of the straight line passingt through the point (4,0) is
y-y1=m(x-x1)
or, y-0=3/2 (x-4)
or, 2y=3x-12
or, 3x-2y=12
or, 2(3x-2y)=2(12) [Multiplying both sides by 2]
or, 6x-4y=24
 
        
             
        
        
        
Answer:
Alike 
Step-by-step explanation:
3x(x+2) simplifies to 3x^2+6x
 
        
                    
             
        
        
        
Answer:
y = -2x + 39
Step-by-step explanation:
2 - 4 = -2 (with negative numbers graphs help a lot more) 
0 - -1 (since there are two negatives together you change both of the signs to their opposite so they both become positive) 
0 + 1 = 1
-2/1 = -2 because a negative divided by a positive is a negative 
I found the y-intercept by substituting one of the points into y=mx+b 
 
        
                    
             
        
        
        
Answer: a.5
Step-by-step explanation:  You cross multiply and get 2x=5x-15. You then simplify this, getting -3x=-15. So the answer is 5.