It means the second to last or the ine that was right before the last.
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the next level of math is geometry
The coefficient in math basically means the number that is placed right next to a variable. An example can be in 3x+4. The numerical coefficient would be 3.
In the strictest mathematical terminology, "How many ..." means: "If you count them, what will be the last number you mention ?" .
what does key mean in math
figure math means figure math