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GalinKa [24]
3 years ago
12

PLS HELP ASAP

Mathematics
2 answers:
prohojiy [21]3 years ago
6 0

Answer:

x = 8

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

Equality Properties

<u>Geometry</u>

  • All angles in a triangle add up to 180°

Step-by-step explanation:

<u>Step 1: Set up Equation</u>

(7x - 1) + 80 + (6x - 3) = 180

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

  1. Combine like terms:                    13x + 76 = 180
  2. Isolate <em>x</em> term:                              13x = 104
  3. Isolate <em>x</em>:                                       x = 8
Serga [27]3 years ago
3 0

Answer: x = 8

Step-by-step explanation:

Hoped this helped

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Answer:

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Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

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So \alpha = 0.05, z is the value of Z that has a pvalue of 1 - \frac{0.05}{2} = 0.975, so Z = 1.96.

How large a sample size is needed to be 95% confident with a margin of error of E?

A sample size of n is needed, and n is found when M = E.

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