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anonymous
 one year ago
PLZ HELP
Equation A: y = x + 1
Equation B: y = 4x + 5
Which of the following steps can be used to find the solution to the set of equations?
x + 1 = 4x + 5
x = 4x + 5
x + 1 = 4x
x + 5 = 4x + 1
anonymous
 one year ago
PLZ HELP Equation A: y = x + 1 Equation B: y = 4x + 5 Which of the following steps can be used to find the solution to the set of equations? x + 1 = 4x + 5 x = 4x + 5 x + 1 = 4x x + 5 = 4x + 1

This Question is Closed

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Any thoughts?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0not really I'm so confused

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Ok, they are using the method of substitution.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1That is where you solve for a variable and plug it into that variable in the other equation.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Both of these equations are already solved for y.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1So, we can take what y= in one equation, and plug it in for y in the other equation.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440003635482:dw

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1I'm not sure what you mean.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0or is that just the slope formula

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Equation b is close to the slope formula, y=mx+b, but it has an x instead of y.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1But have you followed what I have said so far?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1So, if you plug in x+1 for y in the second equation, what do you get?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Hm, no, if we are subbing x+1 in for y, then we don't have y anymore.dw:1440004062537:dw

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1:) Does that make sense?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Cool, so what is the answer?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0can u do another plz?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Equation C: y = 6x + 9 Equation D: y = 6x + 2 Which of the following options is true about the solution to the given set of equations? One solution No solution Two solutions Infinite solutions

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Ok, well, let's see what happens if we do the same thing as the last problem.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1What do you get when you sub 6x+9 for y in the second equation?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Sweet! Can you simplify that?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1No, to move one 6x to the other side, we need to subtract it

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440004496684:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so theres only one solution?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Sweet! So, any thoughts of what that tells us?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Hm, no. When the two equations simplify to a false statement (9 does not equal 2),

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1That means no solution

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1We can graph them to show that too.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1They have the same slope, but different y intercepts

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1So they are parallel lines, and will never cross.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1The solution is the point where the two lines cross.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0y = 3x + 4 2x + 3y = 10 Which of the following steps could be used to solve by substitution? 3x + 4 = 2x + 3y 2x + 3(3x + 4) = 10 2(3x + 4) + 3y = 10 3(y = 3x + 4)

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Ok, any thoughts?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1The first equation is solved for y.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1So, we take what y is in terms of x, and plug it into the other equation.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Can you try to do that?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0im lost, ugh and my online teacher keeps reminding me about time crunch lol

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440004939079:dw Aw, that's frustrating!

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1It is like the other ones, just the second equation isn't solved for y.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1We aren't supposed to solve, just substitute.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440005055460:dw

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1See how I subbed the 3x+4 in for y in the second equation?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1That is all we have to do :)

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Which answer does that look like?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0one more, last one i promise lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0d + e = 15 −d + e = −5 Label the ordered pair as (d, e). (0, 0) (10, −5) (5, 10) (10, 5)

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Ok, this one we actually do have to solve. Any thoughts on how to start?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Well, what happens when we add the two equations together?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1We could, but we would have to solve for one of the variables first.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1I would suggest to use elimination on this one. It is the easier method. :)

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440005374033:dw What happens when we add the two equations together?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Just take a guess

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Ok, but what equation are we left with?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i honestly don't know

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440005536799:dw See how I added the equations together?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Can you combine like terms?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ill be back in one min, my teacher is calling me

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I'm back @JoannaBlackwelder

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Ok, can you combine like terms?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that one is kinda hard

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1It is a little different. dd is what?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1No, it is like 22.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1And e+e is what?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1No, we add the coefficients, and when there is no coefficient written it is understood to be 1. So this is 1e+1e

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1:) And what is 155?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440006758146:dw Great!

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1See how I simplified that?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Sweet, so we need to finish getting e by itself.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1It is currently multiplied by 2

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1So, we need to divide the left side by 2 to leave just e (or 1e)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1440006877761:dw

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Good effort! But we need to divide by 2 to get e by itself, not 10

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1dw:1440006917075:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so whats my second point

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Well, now that we know that e is 5, which answers do we have to choose from?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Are you sure that both c and d have e being 5?

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1No, c, has e as 10.

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1Yep, that is the only answer that has e as 5. We would normally also have to find d, but they gave us a shortcut. :)

JoannaBlackwelder
 one year ago
Best ResponseYou've already chosen the best response.1You're welcome
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