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)

Question

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)

anonymous · Answer

@darkprince14 @cormacpayne can yall help me please?

mrnood · Answer

Elimination means you remove one of the variables

you have 2 equations

y= a
y=b

SO a=b

do that with YOUR equations and oyu have eliminated y and will have an equation in x which can be solved.

Once oyu have a value for x you can put that value into either of the original equations, which will give you an equation in y only, which you can solve.

darkprince14 · Answer

for the substitution, You can do (dunno if its the right term) vertical summation

ay = bx +c
dy = ex +f

we have to find a way so that either ay - dy = 0 or bx - ex  = 0

mrnood · Answer

the 2 equation are equations of straight lines

The solution to the system of equations is the point at which the values are true for BOTH equations.

When you graph 2 different straight lines - how many times do they cross?

anonymous · Answer

they cross one time

mrnood · Answer

so the x and y values at the point where they cross are tru for BOTH equtions at that point only...
so what does that point represent?

anonymous · Answer

so what do i choos elimination or substitution?

anonymous · Answer

@MrNood @darkprince14

mrnood · Answer

I just told you the process above for elimination - but oyu can choose what oyu want

darkprince14 · Answer

you could do either or both if you want to. Both methods will lead you to the same answer :)

mrnood · Answer

Sorry - I guess my method is really substitution

anonymous · Answer

its fine. can yall just show me all the ways to get to the solution like yall do it for me if yall dont mind so i can get this done. ill write the steps as yall go along.

anonymous · Answer

ima wirte em down on paper for notes

mrnood · Answer

I am not going to write the steps - YOU write them here

take the 2 equations above and see them as

y=a
y=b

then rewrite them as a=b

that will give you an equation in x

if oyu don't want ot work with me please say now and I will move on

mrnood · Answer

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