Vitamins are classified as either fat soluble (vitamins A, D, E and K) or water soluble (vitamins B and C). This difference between the two groups is very important. It determines how each vitamin acts within the body.
Rule 3: Subtracting a negative number from a negative numberâwhen you see the subtraction (minus) sign followed by a negative sign, turn the two signs into a plus sign. Thus, instead of subtracting a negative, you are adding a positive.So, â -5 becomes +5, and continue normally with the addition.ou can also think about these problems as addition problemsâyou add the numbers together (5 + 3 = 8) and then, since both numbers have a minus sign in front of them, you would add a negative sign in front of your answer, like this: -8.
In the graph below, x 0 = -1 is negative, so the vertex is moved one unit to the left. The equation, however, looks as though we are adding 1 to x: In other words, In short, positive values added to x in the equation move the graph to the left, toward more negative values. The value of x 0 is negative, but the appearance of the number in the equation is positive. This takes some practice to remember.