Answer:
The expression
has two variables x and y.
Step-by-step explanation:
<u>What is a variable?</u>
A variable is a letter, for instance
or
, that represents an unknown number.
Given the expression

The given expression has three terms which are x, 4y, and -9.
Here:
- The term 'x' is the unknown variable x.
- The term '4y' has a coefficient (the number next to a variable y) of 4.
- The term '-6' is a constant.
As we already know that a variable is a letter, for instance x or y, that represents an unknown number. In other words, the values of x, or y are unknown to us.
Thus, the expression
has two variables x and y.
Yes it is always true a biconditional statement is defined to be true whenever both parts have the same truth value.
Is it 29? i’m not totally sure
First you have to find the measurement of the entire line,which will be equal x, than plug in in the equation between L and M