ccchristian1
  • ccchristian1
A pair of equations is shown below: y = 8x − 9 y = 4x − 1 Part A: Explain how you will solve the pair of equations by substitution or elimination. Show all the steps and write the solution. (5 points) Part B: If the two equations are graphed, at what point will the lines representing the two equations intersect? Explain your answer. (5 points)
Mathematics
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ccchristian1
  • ccchristian1
A pair of equations is shown below: y = 8x − 9 y = 4x − 1 Part A: Explain how you will solve the pair of equations by substitution or elimination. Show all the steps and write the solution. (5 points) Part B: If the two equations are graphed, at what point will the lines representing the two equations intersect? Explain your answer. (5 points)
Mathematics
schrodinger
  • schrodinger
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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ccchristian1
  • ccchristian1
anonymous
  • anonymous
I have no clue ;-; Try tagging so of the mods and ambassadors.
ccchristian1
  • ccchristian1

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anonymous
  • anonymous
UsukiDoll
  • UsukiDoll
k that's enough.. anyway for a we can just use substitution.
UsukiDoll
  • UsukiDoll
suppose we have two equations y=8x-9 and y=4x-1. If we subsitute y =4x-1 into the first equation, we obtain 4x-1=8x-9 we need all the variable terms on the left side of the equation and all of the constant terms on the right side of the equation. Therefore, subtract 8x from both sides and add one on both sides 4x-8x-1=8x-8x-9 -4x-1 = -9 -4x-1+1 = -9+1 -4x = -8 dividing -4 on both sides we obtain x = 2 -4x = -8 ----- ----- -4 -4 x = 2 now to check to see if we got the right answer we substitute x = 2 back into the original equations y=8x-9 and y=4x-1. y = 8(2) - 9 = 16-9 =7 y=4(2)-1 = 8-1 = 7 Both of our y values are 7 7 = 8x -9 7 = 16-9 7=7 7 = 4x-1 7=8-1 7=7 Since we have 7 on both sides when x = 2, we have the correct answer.
ccchristian1
  • ccchristian1
wow thank you
UsukiDoll
  • UsukiDoll
as for part B I think I have already done it.. when two equations intersect, they have a point in common If we let x = 0 1 2 for y=8x-9, we have x y =8x-9 0 -9 1 8-9 = -1 2 16-9 = 7 Similarly, for y =4x-1 x y =4x-1 0 -1 1 4-1 =3 2 8-1 = 7 both of these equations have the point (2,7) in common. So the two lines will meet at point (2,7) . I would draw on OS, but lately their drawing system has been going nuts.
ccchristian1
  • ccchristian1
okay thank you
ccchristian1
  • ccchristian1
thanks so much
UsukiDoll
  • UsukiDoll
:)
UsukiDoll
  • UsukiDoll
you can use what I typed on here xD!
ccchristian1
  • ccchristian1
yeah i am lol
ccchristian1
  • ccchristian1
you got more time, i will post the other question in a different post so you can earn snother medal
ccchristian1
  • ccchristian1
another medal*

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