NathaliaMA13
  • NathaliaMA13
An unknown number y is 12 more than an unknown number x. The number y is also x less than 17. The equations to find x and y are shown below. y = x + 12 y = −x + 17 Which of the following statements is a correct step to find x and y? Multiply the equations to eliminate y. Write the points where the graphs of the equations intersect the x-axis. Write the points where the graphs of the equations intersect the y-axis. Add the equations to eliminate x.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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NathaliaMA13
  • NathaliaMA13
@Michele_Laino Are you busy? can you please explain to me how I solve this?
anonymous
  • anonymous
Add the equations to eliminate x.
anonymous
  • anonymous
By eye ball, y = 29/2

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More answers

NathaliaMA13
  • NathaliaMA13
I understand now. Thanks so much @robtobey
Michele_Laino
  • Michele_Laino
If I add those equations, I get: \[\Large y + y = x + 12 - x + 17\] please simplify
NathaliaMA13
  • NathaliaMA13
\[y ^{2} = 29/2 ?? \]
Michele_Laino
  • Michele_Laino
no, we have: \[\Large 2y = 29\] |dw:1433789390159:dw|
NathaliaMA13
  • NathaliaMA13
Okay. but you don't divide any thing at all?
Michele_Laino
  • Michele_Laino
yes! I can divide by 2, so I get: y=29/2 |dw:1433789590713:dw|
NathaliaMA13
  • NathaliaMA13
Okay, I'm starting to understand more simpler. Can you explain to me how to solve another question, please?
Michele_Laino
  • Michele_Laino
ok!
NathaliaMA13
  • NathaliaMA13
In a different thread or on this one?
Michele_Laino
  • Michele_Laino
in this one :)
NathaliaMA13
  • NathaliaMA13
Ok c: so I'm really getting confused on this question; although it's 8th grade math. it's still very difficult for me :c I tried, I promise I have...
NathaliaMA13
  • NathaliaMA13
Betsey is 11 years older than Waldo. Betsey's age is 15 years less than three times Waldo's age. The system below models the relationship between Betsey's age (b) and Waldo's age (w): b = w + 11 b = 3w − 15 Which of the following methods is correct to find Betsey's and Waldo's age? Solve w + 11 = 3w − 15 to find the value of w. Solve b + 11 = 3b − 15 to find the value of b. Write the points where the graphs of the equations intersect the x-axis. Write the points where the graphs of the equations intersect the y-axis.
Michele_Laino
  • Michele_Laino
since those equations have the same left side, then we can write: \[\Large w + 11 = b = 3w - 15\] or: \[\Large w + 11 = 3w - 15\]
NathaliaMA13
  • NathaliaMA13
OH. The substitution method..Yes.
Michele_Laino
  • Michele_Laino
that's right!
NathaliaMA13
  • NathaliaMA13
But, hey..what value did It solve for? value w, or for value b?
NathaliaMA13
  • NathaliaMA13
There's no value b in any of the answer. So i'm going for value w. lol
Michele_Laino
  • Michele_Laino
if we solve the last equation for w, we get: \[\Large 2w = 26\]
NathaliaMA13
  • NathaliaMA13
Great. Thank you @Michele_Laino I want to give you a medal. But I gave a medal to @robtobey already ://
Michele_Laino
  • Michele_Laino
no worries! :)
NathaliaMA13
  • NathaliaMA13
I undid it, because you gave better explanations. lol. Have a great day! :)
Michele_Laino
  • Michele_Laino
thanks!! :)

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