Answer: B
The number 3 isn't included because the point isn't included.
The arrow points to the left, representing any number less than 3 to be a solution.
Inequality: x < 3
A. -14x+21
because -7 times 2x is -14x and -7 times -3 is 21
Answer:
5824
Step-by-step explanation:
10% of 6400 =640
1% 0f 6400 = 64
640-64=576
6400-576= 5824
Equal expressions can be taken equal to an another variable. The system of equations representing the equation is 
<h3>What is logarithm and some of its useful properties?</h3>
When you raise a number with an exponent, there comes a result.
Lets say you get
Then, you can write 'b' in terms of 'a' and 'c' using logarithm as follows
Some properties of logarithm are:

Log with base e = 2.71828... is written as
simply.
Log with base 10 is written as
simply.
The given equation is:

Adding
on both the sides, we get:

The, we get two equations as:

This is the needed system of equations.
Learn more about logarithms here:
brainly.com/question/20835449
Answer:
2.170
Step-by-step explanation: