Before reducing the radical, what number is under the square root symbol? A.81 B.144 C.50 D.63
1 answer:
Answer:
D. 63
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
Equality Properties
Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality<u>
</u> <u>Algebra I</u>
<u>Trigonometry</u>
[Right Triangles Only] Pythagorean Theorem: a² + b² = c²
a is a leg
b is another leg
c is the hypotenuse<u>
</u> Step-by-step explanation:
<u>Step 1: Identify Variables</u>
Leg <em>a</em> = 9
Leg <em>b</em> = <em>b</em>
Leg <em>c</em> = 12
<u>Step 2: Solve for </u><em><u>b</u></em>
Substitute in variables [Pythagorean Theorem]: 9² + b² = 12² [Subtraction Property of Equality] Isolate <em>b</em> term: b² = 12² - 9² Evaluate exponents: b² = 144 - 81 Subtract: b² = 63 [Equality Property] Square root both sides: b = √63
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