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3 years ago

Which is a correct first step for solving this equation? −5(4x−7)+8=3x

Mathematics

2 answers:

yan [13]3 years ago

8 0

Answer:

Distributive Property

Step-by-step explanation:

−5(4x − 7) + 8 = 3x --- GIVEN

-20x + 35 + 8 = 3x --- Distributive Property

Hope this helps you!!! :)

elena-14-01-66 [18.8K]3 years ago

3 0

Hi there!

The first correct step for solving the equation will be to get rid of the parentheses, and it will be like so,

-5(4x - 7)

Divide -5 on both 4x and -7, you will get, -20x + 35.

Hope this helped!~

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Answer:

Step-by-step explanation:

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1 year ago

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2 years ago

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2 years ago

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2 years ago

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What is the difference between the mean and the median of the data set? {22, 8, 10 ,18 ,12, 20} 0 2 4 6

NikAS [45]

Answer:

Option A - 0

Step-by-step explanation:

Given : Data set {22, 8, 10 ,18 ,12, 20}

To find : What is the difference between the mean and the median of the data set?

Solution :

Data set in increasing order {8, 10 ,12,18, 20,22}

Mean is defined as the division of sum of set values by total number of values.

$M=\frac{\sum x}{n}$

Substitute the values we get,

$M=\frac{8+10+12+18+20+22}{6}$

$M=\frac{90}{6}$

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So, The mean of the set is 15.

Median of even numbers is the average of two middle terms.

$m=\frac{3rd+4th}{2}$

$m=\frac{12+18}{2}$

$m=\frac{30}{2}$

$m=15$

So, The median of the set is 15.

Now, The difference of the mean and the median of the set is

$d=M-m$

$d=15-15$

$d=0$

Therefore,Option A is correct.

The difference of the mean and the median of the set is 0.

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2 years ago

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