4(20 + 12) / (4 - 3) =
<span>4(32) / 1 = </span>
<span>128 / 1 = </span>
<span>128.</span>
<u>Formula</u>
<em>An expression that uses variables to state a rule is a </em><u><em>formula</em></u>
<h2>
Explanation:</h2>
An expression that uses variables to state a rule is a formula. It's important to know that formulas uses the equals sign (=) and includes two or more variables. Formulas gives us information that we express symbolically. For example, the well known formula for the volume of a sphere is defined as:

So in this formula we have a relationship between the volume of a sphere and its radius, so if we have information about the radius of it we can easily calculate the volume of it.
<h2>Learn more:</h2>
Volume of prism: brainly.com/question/12501166
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Answer:
20% discount
Step-by-step explanation:
The hat was originally 35$ he paid 28$, That's a 20% discount.
Answer:
Step-by-step explanation:
10g^6h^6: 2 x 5 x g^6 h^6
4g^5h: 2^2 x g^5 h
the GCF is 2g^5h
The greatest factor of 60 and 75 is 15.
Reasoning: I found the factors and prime factorization of 60 and 75. The biggest common factor number is the GCF number. So the greatest common factor 60 and 75 is 15.