Answer:
a. Triangles or any shape are congruent when they all have the same sides and equivalent angles.
Step-by-step explanation:
no explanation for this
PS. i only did A sorry i cant help everything
Answer:
Step-by-step explanation:
we know that
The simple interest formula is equal to
where
A is the Final Investment Value
P is the Principal amount of money to be invested
r is the rate of interest
t is Number of Time Periods
in this problem we have
substitute in the formula above
Answer:

Step-by-step explanation:
We are given the following information in the question:

This can be written as:

The auxiliary equation obtained is:

Thus, the general solution of the equation is:

Step-by-step explanation:
Here is the answer for your question
Answer:
x=30
Step-by-step explanation:
You have to isolate for x. This means you need to somehow get x on one side of the equation all alone. In this case it is x-9=21 which means some unknown number x with 9 subtracted from it is equal to 21. When we bring the -9 over to the other side to get the x all alone, we have to switch the sign of the -9 so it becomes +9. This means x=21+9, and if you add that you'll get 30!