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3 years ago

8x – 20 is the correct simplified expression for 4(2x – 5). Explain how to verify the simplified expression

Mathematics

2 answers:

MatroZZZ [7]3 years ago

7 0

Not sure if this is right but I would just expand it out again to get 8x-20. ?

aleksandrvk [35]3 years ago

6 0

Using the distributive property, we can go 4(2x) - 4(5) which would equal 8x-20.
Hope this helps and please give brainliest!

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This is used for the next few questions: The rating for the new scary movie has a scale of 0 to 10. The average response was tha

boyakko [2]

Answer:

The percentage that of people who gave the movie a rating between 6.8 and 8.8

P(6.8≤X≤8.8) = 83.9≅ 84 percentage

Step-by-step explanation:

Step(i):-

Mean of the Population = 8.3 points

Standard deviation of the Population = 0.5 points

Let 'X' be the random variable in normal distribution

Let X = 6.8

$Z = \frac{x-mean}{S.D} = \frac{6.8-8.3}{0.5} = -3$

Let X = 8.8

$Z = \frac{x-mean}{S.D} = \frac{8.8-8.3}{0.5} = 1$

The probability that of people who gave the movie a rating between 6.8 and 8.8

P(6.8≤X≤8.8) = P(-3≤Z≤1)

= P(Z≤1)- P(Z≤-3)

= 0.5 + A(1) - ( 0.5 -A(-3))

= A(1) + A(3) (∵A(-3)=A(3)

= 0.3413 +0.4986 (∵ From Normal table)

= 0.8399

Conclusion:-

The percentage that of people who gave the movie a rating between 6.8 and 8.8

P(6.8≤X≤8.8) = 83.9≅ 84 percentage

6 0

4 years ago

The vertices of △JKL are J(−3, 4), K(3, 0), and L(−5, −4). The equation of the median to J is y=0. What are the coordinates of t

telo118 [61]

Answer:j

Step-by-step explanation:

3 0

3 years ago

45 is 30% of what number?

Nina [5.8K]

450/3 = x.
150 = x.
So x = 150.
This means 45 is 30% of 150

6 0

3 years ago

Read 2 more answers

When the outliers are removed, how does the mean change? (2 points) dot plot with 1 on 50, 1 on 76, 1 on 78, 2 on 79, 1 on 80, 1

777dan777 [17]

Answer:

Answer: The mean increases by 3

Step-by-step explanation:

The original data set is

{50, 76, 78, 79, 79, 80, 81, 82, 82, 83}

The outlier is 50 because it is not near the group of values from 76 to 83 which is where the main cluster is.

The original mean is M = (50+76+78+79+79+80+81+82+82+83)/10 = 77

If we take out the outlier 50, the new mean is N = (76+78+79+79+80+81+82+82+83)/9 = 80

So in summary so far

old mean = M = 77

new mean = N = 80

The difference in values is N-M = 80-77 = 3

So that's why the mean increases by 3

8 0

3 years ago

3. Find the value of x in the diagram below X 6 cm 5 4 cm 3 cm R

vazorg [7]

Answer:

4cm is the correct answer

8 0

3 years ago