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Nataliya [291]
3 years ago
7

Easy 10 points (question is down below, thank you.)

Mathematics
1 answer:
daser333 [38]3 years ago
7 0

answer:

Step-by-step explanation:

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How do you factor 8x+56?
Aleksandr [31]
If you mean how do you get x by it's you divide both sides by 8, to cancel out the multiplication between x and 8, meaning that it would end up being x=7, sorry if that didn't answer your question correctly. 
8 0
3 years ago
Read 2 more answers
Which fraction does point A show?<br> A.3/7<br> B.3/4<br> C.8/5<br> D.7/4
IgorLugansk [536]

Answer:

d 7/4

Step-by-step explanation:

6 0
3 years ago
Suppose that replacement times for washing machines are normally distributed with a mean of 9.3 years and a standard deviation o
Harlamova29_29 [7]

Answer:

The probability is 0.0643

Step-by-step explanation:

* Lets revise some definition to solve the problem

- The standard deviation of the distribution of sample means is called σM

- σM = σ/√n , where σ is the standard deviation and n is the sample size

- z-score = (M - μ)/σM, where M is the mean of the sample , μ is the mean

 of the population  

* Lets solve the problem

- The mean of the washing machine is 9.3 years

∴ μ = 9.3

- The standard deviation is 1.1 years

∴ σ = 1.1

- There are 70 washing machines randomly selected

∴ n = 70

- The mean replacement time less than 9.1 years

∴ M = 9.1

- Lets calculate z-score

∵ σM = σ/√n

∴ σM = 1.1/√70 = 0.1315

∵ z-score = (M - μ)/σM

∴ z-score = (9.1 - 9.3)/0.1315 = - 1.5209

- Use the normal distribution table of z to find P(z < -1.5209)

∴ P(z < -1.5209) = 0.06426

∵ P(M < 9.1) = P(z < -1.5209)

∴ P(M < 9.1) = 0.0643

* The probability is 0.0643

5 0
3 years ago
Work out the value of 4(2x+3y) when x=8 and y=-3
meriva
4(2 x 8 + 3 x (-3))
4(16 + (-9))
4(7)
=28

8 0
3 years ago
Which expression is equivalent to 8(k + m) - 15(2k + 5m)?<br> agul
SpyIntel [72]

Answer:

-22k - 67m

Step-by-step explanation:

You have to use the Distributive property:

8(k + m) - 15 (2k + 5m)

8k + 8m - 30k - 75m

Now simplify:

8k - 30k + 8m - 75m

-22k - 67m

Be careful with positives and negatives!

Hope this help!

4 0
3 years ago
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