anonymous
  • anonymous
~I will give medal to the person who helps me ~ Given ABC find the values of x and y. In your final answer, include all of your calculations (Picture will be below)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
1 Attachment
anonymous
  • anonymous
|dw:1438643579023:dw|
JoannaBlackwelder
  • JoannaBlackwelder
Nice drawing. :-) Any ideas how to start?

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anonymous
  • anonymous
well from the last person who tried to help totally confused me ~ but i asked my teacher to but she made my confusion worse this is what she said. Let CD = x-9 6/x = (x-9)/6 cross multiply 36 = x^2 - 9x x^2 - 9x - 36 When you factor this you will get 2 binomials. Set each equal to 0 and solve. Only the positive answer will work. Then set up another proportion with 9/y = y/answer for x
JoannaBlackwelder
  • JoannaBlackwelder
Hm, that could work. Let me show you how I would start it.
anonymous
  • anonymous
alright ~`
JoannaBlackwelder
  • JoannaBlackwelder
|dw:1438644079169:dw| Pyth used 3 times on the 3 right triangles
JoannaBlackwelder
  • JoannaBlackwelder
Then I used substitution to simplify one equation to only one variable
anonymous
  • anonymous
wait what did you substitute ??
JoannaBlackwelder
  • JoannaBlackwelder
|dw:1438644230084:dw|
JoannaBlackwelder
  • JoannaBlackwelder
|dw:1438644298448:dw|
JoannaBlackwelder
  • JoannaBlackwelder
See how I did that?
anonymous
  • anonymous
pythagorean theorem right ?
JoannaBlackwelder
  • JoannaBlackwelder
3 times, then substituted to make one equation with only x
anonymous
  • anonymous
ohh yea ! I think I understand now but this is so different from what the other person tried to tell me.
JoannaBlackwelder
  • JoannaBlackwelder
Yeah, it is using formulas you already use in a more complex way, but you don't have to memorize a new formula. That's why I like it. :-)
anonymous
  • anonymous
this formula is the pythagorean one right ?
anonymous
  • anonymous
it has the times 2 on each number ~
JoannaBlackwelder
  • JoannaBlackwelder
|dw:1438644708961:dw| All three of these are Pythagorean
JoannaBlackwelder
  • JoannaBlackwelder
And those are squares, not times 2
anonymous
  • anonymous
ohhh ~ My dumb mistake ! hahaha ~
JoannaBlackwelder
  • JoannaBlackwelder
:-) No worries
anonymous
  • anonymous
but what type of equation type is this ? jw im a little rusty on my algebra stuff so I don't remember much
JoannaBlackwelder
  • JoannaBlackwelder
Quadratic
anonymous
  • anonymous
alright ~~ but i never used it for this
JoannaBlackwelder
  • JoannaBlackwelder
The formula your teacher gave you was quadratic
anonymous
  • anonymous
oh well Im sorry its just super hard with all these different equation types
JoannaBlackwelder
  • JoannaBlackwelder
No worries, I know it can be tricky to keep up with it all.
anonymous
  • anonymous
ill try my best, but what are we trying to find first the x or y?
anonymous
  • anonymous
the problem says find x and y
JoannaBlackwelder
  • JoannaBlackwelder
We are finding x first just because it worked out to be easier to solve for it first.
anonymous
  • anonymous
alright, so its \[6^{2}\]
anonymous
  • anonymous
the equation = to

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