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2 years ago

If a = b, then a - c = b - c. This is the ___________________ property of equality.

Mathematics

2 answers:

Fantom [35]2 years ago

7 0

Answer:

communitive

Step-by-step explanation:

zlopas [31]2 years ago

5 0

Answer:

communitive

Step-by-step explanation:

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Which expression uses the associative property to make it easier to evaluate 6(3/2x1/5) ?

agasfer [191]

I think the answer is B but I’m not sure, sorry if i got it wrong,

have a good day and have a good Christmas

7 0

3 years ago

Pls help on my maths

skad [1K]

<h3><u>Answer:</u></h3>

$r = 2.82$

<h3><u>Step-by-step explanation:</u></h3>

<u>Given: </u>

$A = 25$

<u>Let's simplify.</u>

=> $25 = \frac{22}{7} r^{2}$
=> $\frac{25}{\frac{22}{7} } = \frac{\frac{22}{7}r^{2} }{\frac{22}{7\\} }$
=> $\frac{7(25)}{22} = r^{2}$
=> $\sqrt{\frac{25(7)}{22}}= \sqrt{r^{2}}$
=> $\sqrt{\frac{25(7)}{22}}= r$
=> $r = 2.82$ (Estimated)

<u>Therefore, r ≈ 2.82.</u>

Hoped this helped.

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2 years ago

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Find the median of the set of data.

e-lub [12.9K]

41 there are 12 numbers take middle

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3 years ago

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Write an expression for the sequence of operations described below. double r, then raise the result to the 8th power Do not simp

S_A_V [24]

Answer: (2r)⁸ or (2r)∧8

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

Double r = this means that we have to multiply the variable "r" by 2 .(2r)

Then raise the result to the 8th power = this means that the product (2r) is the base and 8 is the exponent.

Mathematically speaking

(2r)⁸ or (2r)∧8

Feel free to ask for more if needed or if you did not understand something.

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3 years ago

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The set of life spans of an appliance is normally distributed with a mean Mu = 48 months and a standard deviation Sigma = 8 mont

natita [175]

To solve the problem we must know about Z-Score.

<h3>What is Z-score?</h3>

A Z-score helps us to understand how far is the data from the mean. It is a measure of how many times the data is above or below the mean. It is given by the formula,

$Z = \dfrac{X- \mu}{\sigma}$

Where Z is the Z-score,

X is the data point,

μ is the mean and σ is the standard variable.

The life span of an appliance that has a z-score of –3 is 24 months.

Given to us

Mean, μ = 48 months,
standard deviation, σ = 8 months,
Z-Score = -3

<h3> What is the life span of an appliance?</h3>

The life span of the appliance can be calculated using the Z-score formula,

$Z = \dfrac{X- \mu}{\sigma}$

Substitute the values,

$-3 = \dfrac{X- 48}{8}\\\\-3 \times 8 = X - 48\\\\-24+48=X\\\\X = 24\ months$

Hence, the life span of an appliance that has a z-score of –3 is 24 months.

Learn more about Z-score:

brainly.com/question/13299273

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3 years ago