Mathematics
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OpenStudy (taylor0402):
I need help on 2 questions...I will give a medal
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OpenStudy (taylor0402):
What is the best approximation of the solution to the system, to the nearest integer values?
OpenStudy (taylor0402):
i think the answer is (1,-3) @igreen
OpenStudy (anonymous):
yup it is... @Taylor0402
OpenStudy (taylor0402):
can you help me on one more please @MARC_
OpenStudy (anonymous):
i will try my best
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OpenStudy (taylor0402):
what is the solution to the system of equations
5x-3y=-9 and 2x-5y=4
OpenStudy (taylor0402):
i am so confused i dont remember what to do
OpenStudy (anonymous):
there are three types of method
1)elimination method
2)substitution method
3)Graphing method
OpenStudy (anonymous):
we will use elimination method bcoz it is faster
OpenStudy (taylor0402):
ok i know i cant use elimination method so that out of the question
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OpenStudy (taylor0402):
oops sorry i guess we can than
OpenStudy (anonymous):
\[5x-3y=-9-First~eqn\]\[2x-5y=4-Second~eqn\]
OpenStudy (anonymous):
Multiply the first eqn by 2 and multiply the second eqn by 5
OpenStudy (taylor0402):
ok got it
OpenStudy (anonymous):
in oder to eliminate x
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OpenStudy (taylor0402):
so it would be 5(2*5)-3y=-9
OpenStudy (anonymous):
\[10x-6y=-18\]\[10x-25y=20\]
OpenStudy (taylor0402):
ok then what do i do now this is were i always get stuck
OpenStudy (anonymous):
okay,in oder to eliminate x, subtract the first equation with the second eqn
OpenStudy (taylor0402):
????? how would i do that ?????
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OpenStudy (anonymous):
\[10x-6y=-18-first~eqn\]\[10x-25y=20-second~eqn\]
OpenStudy (taylor0402):
i got that but would i do this to subtract them
OpenStudy (taylor0402):
\[10x-10x+6y-25\]
OpenStudy (anonymous):
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