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2 years ago

Mention the commutativity associative and distributive properties of rational number

Mathematics

1 answer:

evablogger [386]2 years ago

6 0

Answer:

Associative property: a + (b + c), a – (b – c) ≠ (a – b) – c, a × (b × c) = (a × b) × c, and a ÷ (b ÷ c) ≠ (a ÷ b) ÷ c

When a = ½ and b = ¾

Now, for checking a × b = b × a, consider LHS and RHS.

LHS = a × b = ½ × ¾ = ⅜

RHS = b × a = ¾ × ½ = ⅜

Thus, LHS = RHS (Hence proved)

Step-by-step explanation:

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A set of average city temperatures in July are normally distributed

Archy [21]

Answer:

a) 59.87%

Step-by-step explanation:

Given that the mean temperature (μ) = 23.5°C and the standard deviation (σ) is 2 °C.

The z score is used in statistics to measure number of standard deviation by which the raw score is above or below the mean value, It is calculated using the equation:

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

The average temperature of the City of Van Nuys is 23 degrees. The z score is

$z=\frac{x-\mu}{\sigma}=\frac{23-23,5}{2} =-0.25$

P(x > 23) = P(z > -0.25) = 1 - P(z < -0.25) = 1 - 0.4013 = 0.5987 = 59.87%

3 0

2 years ago

A+2 is less than it equal to 2

Veronika [31]

What is the question

7 0

2 years ago

1 - 10x = 81 <br> Value of X?

igomit [66]

x = -8

Step-by-step explanation:

Step 1: Subtract 1 from both sides

$1 - 10x - 1 = 81 - 1 \\ - 10x = 80$

Divide both sides of the equation by -10

$\frac{ - 10x}{ - 10} = \frac{80}{ - 10} \\ \\ x = - 8$

4 0

2 years ago

Read 2 more answers

Help me plz thank you

Travka [436]

Answer: 2nd one

Hard to explain

Pls give brainliest.

3 0

2 years ago

Please answer this in two minutes

NeTakaya

Answer:

Step-by-step explanation:

Use the Pythagorean Thereom:

$r^{2}$ = $9^{2}$ + $12^{2}$

$r^{2}$ = 81+144

$r^{2}$ = 225

$r$ = 15

Please mark me as Brainliest!

8 0

2 years ago