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OpenStudy (anonymous):
The first term of an arithmetic sequence is represented by 3x+2y. The third term is represented by 7x. Write the expression that represents the second term.
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OpenStudy (anonymous):
Please show me the steps D:
OpenStudy (anonymous):
an=a1+(n-1)d then a3=a1+2d 7x=3x+2y+2d 4x-2y=2d d=2x-y now a2=a1+d=3x+2y+2x-y=5x+y
OpenStudy (anonymous):
the answer is 5x + y though :(
OpenStudy (anonymous):
ohhhh!!!
OpenStudy (anonymous):
never mind, thank you!!
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