anonymous
  • anonymous
true or false? In order to solve a system of equation by substitution, you MUST always solve for y in one of the equations and hen back-substitute
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
True
anonymous
  • anonymous
because for example if you have to unknowns and two equations, ex: y=x+5 and the other says x=y-6.....then you would have to back substitue the y=x+5 into the value for y in the second equation.
anonymous
  • anonymous
|dw:1330406766557:dw|

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anonymous
  • anonymous
then just solve for x
anonymous
  • anonymous
thank you i understand now
anonymous
  • anonymous
|dw:1330406799210:dw|
anonymous
  • anonymous
true or false? the x-intercept of the line with equation -3x+2y=5 is (-5/3,0)
anonymous
  • anonymous
true
anonymous
  • anonymous
i dont understand
anonymous
  • anonymous
because to find the x intercept you have to set the y intercept to 0
anonymous
  • anonymous
The previous problem was False ... you can solve for x and back substitute also !
anonymous
  • anonymous
it doesn't matter for which variable you're solving
anonymous
  • anonymous
? if you have and equation with two unknows you wont be able to solve for x....for ex: y=x+5, solve for x? you cant
anonymous
  • anonymous
your gonna have to back substitute
anonymous
  • anonymous
for the second equation
anonymous
  • anonymous
how do you get -5/3 for x i am getting -5
anonymous
  • anonymous
|dw:1330407174168:dw|
anonymous
  • anonymous
and your y would be 0
anonymous
  • anonymous
in finding the y-intercept, assume that the value of x is zero, or vice versa. .
radar
  • radar
true or false? In order to solve a system of equation by substitution, you MUST always solve for y in one of the equations and hen back-substitute The answer is false. And as far as y=x+5 you can solver for x. getting x=y-5 You can solve for either x or y (assuming you have two equations with two unknowns x, and y. Choosing the one that is most convenient and then substitute the value found in the remaining unknown.
radar
  • radar
true or false? the x-intercept of the line with equation -3x+2y=5 is (-5/3,0) First put equation in the slope intercept form: You will get y=(3/2)x+5/2 The y intercept is 5/2

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