Answer:
a = 12
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>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: Define</u>
<em>Identify variables</em>
<em>a</em> = <em>a</em>
<em>b</em> = 9
<em>c</em> = 15
<u>Step 2: Solve for </u><em><u>a</u></em>
- Substitute in variables [Pythagorean Theorem]: a² + 9² = 15²
- Evaluate exponents: a² + 81 = 225
- [Subtraction Property of Equality] Subtract 81 on both sides: a² = 144
- [Equality Property] Square root both sides: a = 12
Answer: Each CD cost $16.20 before tax
Step-by-step explanation:
103.8 = 6.6 + 6c
c = CDs
103.8 - 6.6 = 97.2
97.2 = 6c
97.2/6 = 16.2
16.2 = c
The sum of 5 and 8 is 13.
Unknown number is x
So 13x=42
x=4
Answer:
5 words
Step-by-step explanation:
because there are five vowels
