Answer:
File doesn't appear, can't help you without enough infomation.
Step-by-step explanation:
By definition, we have

So, we have to solve two different equations, depending of the possible range for the variable. We have to remember about these ranges when we decide to accept or discard the solutions:
Suppose that 
In this case, the absolute value doesn't do anything: the equation is

We are supposing
, so we can accept this solution.
Now, suppose that
. Now the sign of the expression is flipped by the absolute value, and the equation becomes

Again, the solution is coherent with the assumption, so we can accept this value as well.
80 since he starts off with 38 stamps then gains 6 each month for 7 months (6x7=42) so 42+38=80
Answer:
parallelograms
Area = base * height
Rhombus Area = Product of the diagonals
Trapezoid Area = median * height
Step-by-step explanation:
20% of the length is 23 cm
100% of the length is 23×5 = 115 cm