Skin tags that have changed color or bleed may require your doctor's evaluation and reassurance. Rarely, thrombosed skin tags may be a sign of another condition and need to be biopsied.
The x-axis and y-axis are two lines that create the coordinate plane. The x-axis is a horizontal line and the y-axis is a vertical line. I'm sure you've heard that a million times, but it might hard for you to remember which one is which. Here is a little trick to help you remember...
Vertical subtraction is a method of subtracting where you place the numbers vertically and line up the numbers with the same place values in the same columns. This allows you to subtract the numbers in each place value separately to come up with the answer.