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navik [9.2K]
3 years ago
14

Solve using the quadratic formula. Approximate answers to the nearest tenth.

Mathematics
1 answer:
Thepotemich [5.8K]3 years ago
6 0

Answer:

\displaystyle x = 2, \ 3

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Algebra I</u>

  • Standard Form: ax² + bx + c = 0
  • Quadratic Formula: \displaystyle x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify variables</em>

x² - 5x + 6

↓

<em>a</em> = 1, <em>b</em> = -5, <em>c</em> = 6

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Substitute in variables [Quadratic Formula]:                                                   \displaystyle x = \frac{5 \pm \sqrt{(-5)^2-4(1)(6)}}{2(1)}
  2. [√Radical] Evaluate exponents:                                                                       \displaystyle x = \frac{5 \pm \sqrt{25-4(1)(6)}}{2(1)}
  3. [√Radical] Multiply:                                                                                           \displaystyle x = \frac{5 \pm \sqrt{25-24}}{2(1)}
  4. [√Radical] Subtract:                                                                                          \displaystyle x = \frac{5 \pm \sqrt{1}}{2(1)}
  5. [√Radical] Evaluate:                                                                                         \displaystyle x = \frac{5 \pm 1}{2(1)}
  6. Multiply:                                                                                                             \displaystyle x = \frac{5 \pm 1}{2}
  7. Add/Subtract:                                                                                                    \displaystyle x = \frac{4}{2}, \ \frac{6}{2}
  8. Divide:                                                                                                               \displaystyle x = 2, \ 3
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Given - A lottery offers one $900 prize, one $600 Prize, three $400 prizes, and four $100 prizes. One thousand tickets are sold at $5 each.

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