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miv72 [106K]
2 years ago
10

Find the mean of the following data set: 9, 12, 7, 13, 21, 10, 12, 4

Mathematics
1 answer:
Dmitriy789 [7]2 years ago
7 0

Answer:

11

Step-by-step explanation:

9 + 12 + 7 + 13 + 21 + 10 + 12 + 4

21 + 20 + 31 + 16

41 + 47

88

88 / 8 = 11

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If f(x) = -2x + 3 and g(x) = 2x + 3; solve for f(3) + g(7)<br> Answers: 0, 14, 26, 25
Brums [2.3K]

Answer:

14

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

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

<u>Algebra I</u>

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Step-by-step explanation:

<u>Step 1: Define</u>

f(x) = -2x + 3

g(x) = 2x + 3

f(3) is x = 3 for function f(x)

g(7) is x = 7 for function g(x)

<u>Step 2: Solve</u>

  1. Substitute in <em>x</em> [Functions]:                                                                               f(3) = -2(3) + 3, g(7) = 2(7) + 3
  2. Substitute in functions:                                                                                     f(3) + g(7) = -2(3) + 3 + 2(7) + 3
  3. Multiply:                                                                                                             f(3) + g(7) = -6 + 3 + 14 + 3
  4. Add:                                                                                                                   f(3) + g(7) = -3 + 14 + 3
  5. Add:                                                                                                                   f(3) + g(7) = 14
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