Algebraic expressions are expressions that use numbers and variables
The value of A is 65/64
<h3>How to determine the value of A</h3>
The expression is given as:

Rewrite the expression as:

Factor out 2^x

Rewrite as product

The expression to compare with is given as: A * 2^x.
So, we have:

Divide both sides by 2^x

Take LCM


Hence, the value of A is 65/64
Read more about expressions at:
brainly.com/question/4344214
You have one of the answers correct. The fraction 4/8 is equal to 1/2
Other answers are: 5/10, 10/20, and 6/12
If you reduced each of those fractions, you'd get to 1/2.
You can use a calculator to find that
4/8 = 0.5
1/2 = 0.5
5/10 = 0.5
10/20 = 0.5
6/12 = 0.5
All fractions mentioned lead to the same decimal value, so this confirms all of the fractions are equivalent to one another.