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Find the value of B-A  if the graph of Bx+Ay=3 passes through the point (-7,2), and is parallel to the graph of x + 3y = -5.

 Jun 7, 2021
 #1
avatar+34340 
+2

x + 3y = -5.        re-arrange

 

y = - 1/3 x - 5    slope = - 1/3   parallel slope is the same   -1/3

 

 

y = - 1/3 x   + b       sub in the given point to calculate 'b'

2 = - 1/3 (-7) + b      so b = -1/3

             

 

y = -1/3 x  - 1/3    multiply by 3 to get rid of the fraction

3y = -x -1

x + 3y = -1

-3x-9y= 3             you can finish cheeky

 Jun 7, 2021
 #2
avatar+67 
+1

Thank you 😊.

Technoblade  Jun 7, 2021

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