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artcher [175]
3 years ago
5

Cecil started from point A and moved according to the expression 8+(-5)+7+6+(-7)+5+(-8).What one additional step does Cecil need

to in order to return to the starting point? CAN SOMEONE PLEASE HELP ME
Mathematics
2 answers:
Shkiper50 [21]3 years ago
8 0
This may look difficult but really it is just addition and subtraction. So first of all the negative numbers EX: (-5),  those are easy if it says add negative 5. its the same as subtraction 5. Its easier if you use a number line. So the problem 8+(-5)+7+6+(-7)+5+(-8) is equal to 6. So if the objective is to get the number to 0, you can subtract 6 (or add negative 6). If the objective is to get back to 8 (Since that is technically point A though it is unclear) then you need to add 2 (or subtract negative 2).  Viola!
cupoosta [38]3 years ago
6 0
Im pretty sure that i can solve this for ya
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There are 6 black socks and 4 white socks in a drawer. If one sock is taken out without
miss Akunina [59]

Answer:

60 percent

Step-by-step explanation:

6 black socks, 4 white socks, 10 socks altogether, 60 percent of the socks are black, so is the chance of picking both black socks

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Walter buys a bus pass for $30 every time he rides the bus money is deducted from the value of the pass he rode 12 times and $24
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What is the sum of 6 ×10^3 and3×10^2​​?
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2 years ago
A company compiles data on a variety of issues in education. In 2004 the company reported that the national college​ freshman-to
nasty-shy [4]

Answer:

1) Randomization: We assume that we have a random sample of students

2) 10% condition, for this case we assume that the sample size is lower than 10% of the real population size

3) np = 500*0.66= 330 >10

n(1-p) = 500*(1-0.66) =170>10

So then we can use the normal approximation for the distribution of p, since the conditions are satisfied

The population proportion have the following distribution :

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})  

And we have :

\mu_p = 0.66

\sigma_{p}= \sqrt{\frac{0.66(1-0.66)}{500}}= 0.0212

Using the 68-95-99.7% rule we expect 68% of the values between 0.639 (63.9%) and 0.681 (68.1%), 95% of the values between 0.618(61.8%) and 0.702(70.2%) and 99.7% of the values between 0.596(59.6%) and 0.724(72.4%).

Step-by-step explanation:

For this case we know that we have a sample of n = 500 students and we have a percentage of expected return for their sophomore years given 66% and on fraction would be 0.66 and we are interested on the distribution for the population proportion p.

We want to know if we can apply the normal approximation, so we need to check 3 conditions:

1) Randomization: We assume that we have a random sample of students

2) 10% condition, for this case we assume that the sample size is lower than 10% of the real population size

3) np = 500*0.66= 330 >10

n(1-p) = 500*(1-0.66) =170>10

So then we can use the normal approximation for the distribution of p, since the conditions are satisfied

The population proportion have the following distribution :

p \sim N(p,\sqrt{\frac{\hat p(1-\hat p)}{n}})  

And we have :

\mu_p = 0.66

\sigma_{p}= \sqrt{\frac{0.66(1-0.66)}{500}}= 0.0212

And we can use the empirical rule to describe the distribution of percentages.

The empirical rule, also known as three-sigma rule or 68-95-99.7 rule, "is a statistical rule which states that for a normal distribution, almost all data falls within three standard deviations (denoted by σ) of the mean (denoted by µ)".

On this case in order to check if the random variable X follows a normal distribution we can use the empirical rule that states the following:

• The probability of obtain values within one deviation from the mean is 0.68

• The probability of obtain values within two deviation's from the mean is 0.95

• The probability of obtain values within three deviation's from the mean is 0.997

Using the 68-95-99.7% rule we expect 68% of the values between 0.639 (63.9%) and 0.681 (68.1%), 95% of the values between 0.618(61.8%) and 0.702(70.2%) and 99.7% of the values between 0.596(59.6%) and 0.724(72.4%).

8 0
3 years ago
I need major help on these set theory questions!!!
Savatey [412]

Answer:

4. option D

5. option C

6. option A

7. option A

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2 years ago
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