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3 years ago

Before reducing the radical, what number is under the square root symbol? A.81 B.144 C.50 D.63

Mathematics

1 answer:

Lady_Fox [76]3 years ago

7 0

Answer:

D. 63

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Equality Properties

Multiplication Property of Equality
Division Property of Equality
Addition Property of Equality
Subtraction Property of Equality

Algebra I

Terms/Coefficients

Trigonometry

[Right Triangles Only] Pythagorean Theorem: a² + b² = c²

a is a leg
b is another leg
c is the hypotenuse

Step-by-step explanation:

Step 1: Identify Variables

Leg a = 9

Leg b = b

Leg c = 12

Step 2: Solve for b

Substitute in variables [Pythagorean Theorem]: 9² + b² = 12²
[Subtraction Property of Equality] Isolate b term: b² = 12² - 9²
Evaluate exponents: b² = 144 - 81
Subtract: b² = 63
[Equality Property] Square root both sides: b = √63

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