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3 years ago

Simplity 82 - 6(7 - 4) + 2

Mathematics

1 answer:

Arlecino [84]3 years ago

8 0

Answer:

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

Step 1: Define Expression

82 - 6(7 - 4) + 2

Step 2: Evaluate

(Parenthesis) Subtract: 82 - 6(3) + 2
Multiplication: 82 - 18 + 2
Subtraction: 64 + 2
Addition: 66

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ArbitrLikvidat [17]

Answer:

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Step-by-step explanation:

Mean = $\mu = 40$

Standard deviation = $\sigma = 5$

Now we are supposed to find out what percent of the numbers fall between 35 and 50

$z = \frac{x-\mu}{\sigma}$

Substitute the values

$z = \frac{x-40}{5}$

Now for P(35<x<50)

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