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MaRussiya [10]
3 years ago
9

On a coordinate grid, point A is at (−3.0, −5.4) and point B is at (−3.0, 5.4). Point B is a reflection of point A across the __

_–axis. Input either a lowercase x or y
Mathematics
1 answer:
Semenov [28]3 years ago
6 0
Reflecting across the x axis changes the polarity of the y coordinate so the answer would be x
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Major league baseball salaries averaged $1.5 million with a standard deviation of $0.8 million in 1994. suppose a sample of 100
seropon [69]

Answer: The probability that the avg. salary of the 100 players exceeded $1 million is approximately 1.

Explanation:

Step 1: Estimate the standard error. Standard error can be calcualted by dividing the standard deviation by the square root of the sample size:

SE=\frac{0.8}{\sqrt{100}}=\frac{0.8}{10} = 0.08

So, Standard Error is 0.08 million or $80,000.

Step 2: Next, estimate the mean is how many standard errors below the population mean $1 million.

\frac{1 - 1.5}{0.08}

=-6.250

-6.250 means that $1 million is siz standard errors away from the mean. Since, the value is too far from the bell-shaped normal distribution curve that nearly 100% of the values are greater than it.

Therefore, we can say that because 100% values are greater than it, probability that the avg. salary of the 100 players exceeded $1 million is approximately 1.

5 0
3 years ago
What is 8 2/10 minus 4 1/3
Alik [6]

Answer:

Convert the mixed numbers to improper fractions, then find the LCD and combine.

Exact Form:

58 /15

Decimal Form:

3.8 6

Mixed Number Form:

3  13 /15

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
1.In a class of 45 pupils ,21play chess and 23 play cards and 5play both games
Mumz [18]

Step-by-step explanation:

(a)

ii.

21 - 5 = 16 play only chess.

iii.

23 - 5 = 18 play only cards

5 play both.

that is 16+18+5 = 39 that play at least one of these games.

i.

so, 45 - 39 = 6 don't play any of these games.

(b)

we have 16+18 = 34 pupils out of 45 that play exactly one game.

so the probabilty to pick one of them is as usual

desired cases / total cases = 34/45 =

= 0.755555555... ≈ 0.76

8 0
2 years ago
Not sure how to do this
Sergio039 [100]
45 i believe it is i may be wrong!!!
5 0
3 years ago
Find the probability of picking a purple marble from a jar with 14 green and 14 purple<br> marbles.
iris [78.8K]

Step-by-step explanation:

n(s)=28

n(p)=14

p(p)= n(p)/n(s)

= 14/28

=1/7

4 0
3 years ago
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