Which of the following equations is written in standard form?
-2x=13
3x+5y=-15
1/2 x + 1/3 y =1/5
-3x+13y =25

Question

Which of the following equations is written in standard form?
-2x=13
3x+5y=-15
1/2 x + 1/3 y =1/5
-3x+13y =25

phi · Answer

the variables in alphabetical order on the left side of the =
no fractions
first term is positive

anonymous · Answer

so which one is it?

phi · Answer

do you see any choices where the first term is negative ?
those are NOT the answer.

phi · Answer

you have to answer this by the process of elimination.

anonymous · Answer

the second one?

phi · Answer

the first choice is wrong  (negative first term)
so it the last for the same reason
the third choice has fractions.  Fractions are not allowed.
that leaves just the second choice.

anonymous · Answer

ah! okay! so I was right :) hehe thank you~