8-21
9- -16 i think lemme do the next ones
 
        
             
        
        
        
Ok so we'll  go ahead and solve for y first -  we just need to get it alone on one side of the equal sign
Step 1: subtract 2x from each side
2x - 7y - 2x = 19 - 2x
This cancels out the 2x on the left, giving us
-7y = 19 - 2x
Step 2: divide both sides by -7
 =
 =  +
 + 
This gives us
y = -19/7 + 2x/7
That should be your answer for the first question. Now solving the next parts are easy. All you need to do is plug in x.
When x = -3
y = -19/7 + 2x/7
y = -19/7 + 2(-3)/7
y = -19/7 - 6/7
y = -25/7
When x = 0
y = -19/7 + 2x/7
y = -19/7 + 2(0)/7
y = -19/7
When x = 3
y = -19/7 + 2x/7
y = -19/7 + 2(3)/7
y = -19/7 + 6/7
y = -13/7
Hope that helps! Feel free to ask if I can help with anything else :)
 
        
             
        
        
        
Answer:
67.5 pages
Step-by-step explanation:
45 divided by 2 is 22.5, so you would do 3x22.5=67.5
Hope this helped!
 
        
             
        
        
        
La Mamá de la mamá de la mamá de la mamá de la mamá
        
             
        
        
        
Answer:
0.5
Step-by-step explanation:
we see that A is 1 of 2 choices, so theoretically, P(A) = 1/2 = 0.5