Each have six in them because six times three equals eighteen and twenty minus two equals eighteen.hope this helps
Comparing with the original expression, the value that will go into the green box is 5
<h3>Exponents and indices</h3>
Given the indices expression below;

Since 4^-5 is equivalent to 1/4^5, hence the given expression will be equivalent to;

Comparing with the original expression, the value that will go into the green box is 5
Learn more on exponent here: brainly.com/question/11975096
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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
Answer:
21
Step-by-step explanation:
He will guess correctly 25% of the time.
He has 84 questions
25% of 84
.25 * 84
21
We should expect that he will get 21 questions correct