Substitution.
Here is an example.
Let x be equal to 3 and y equal to 3.

From this we can conclude that the values of both x and y are equal to three therefore x and y have the same value and are equal.

Here in your case we have:

Hope this helps.
r3t40
Answer:
a
Step-by-step explanation:
because I just think its a
Step-by-step explanation:



Answer:
$13.95
Step-by-step explanation:
You need to multiply the 5 notebooks with the costs of each notebook, which gives you the total costs before tax.
Answer:
D. $3.79x
$15
<em>Brainliest, please!</em>
Step-by-step explanation:
It costs $3.79 per bag of chips, and Mr. Connor can pay NO MORE THAN $15.