3 is converted to 0.03
19/20 is converted to 0.95.
Answer:

Step-by-step explanation:
<h3>Factorize the Expressions</h3>


<h3>Factor out the Common Factors</h3>

<h3>Multiply the Common Factors</h3>

The Factored expressions are

And

1. we know she needs 3 packs of biscuits
2. Shop A you only need to pay for 2 packs
3. Shop B you only need to pay for 2 packs
4. Shop C you need to pay for all three
5. so we know C is out of the option.

so shop A and B will cost the least
For this case we must find the value of the variable "x" of the following equation:

We multiply by 3 on both sides of the equation:

We divide between 2 on both sides of the equation:

We subtract 7 on both sides of the equation:

Answer:
Option B