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blondinia [14]
3 years ago
8

Evaluate the expression 3.14(a2 + ab) when a = 3 and b = 4.

Mathematics
2 answers:
Lady_Fox [76]3 years ago
6 0

Hey there!

3.14(a^2 + ab)

= 3.14(3^2 + 3 *4)

3^2

= 3 * 3

= 9

3 * 4

= 12

3.14(9 + 12)

9 + 12

= 21

3.14(21)

= 65.94

Answer: 65.94

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

exis [7]3 years ago
6 0

Answer:

65.94

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>

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Identify</em>

3.14(a² + ab)

<em>a</em> = 3

<em>b</em> = 4

<u>Step 2: Evaluate</u>

  1. Substitute in variables:                                                                                     3.14(3² + 3 · 4)
  2. (Parenthesis) Exponents:                                                                                 3.14(9 + 3 · 4)
  3. (Parenthesis) Multiply:                                                                                      3.14(9 + 12)
  4. (Parenthesis) Add:                                                                                            3.14(21)
  5. Multiply:                                                                                                             65.94
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