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kodGreya [7K]
3 years ago
10

Put 4,7,3,5,2,2,7,4 to find the median

Mathematics
2 answers:
zimovet [89]3 years ago
8 0
- -Put the numbers out from least to greatest:

2, 2, 3, 4, 4, 5, 7, 7, 
Now start crossing off until you get to the middle, so ill mark bold as what i cross of:

2, 2, 3, 4, 4, 5, 7, 7

now

2, 2, 3, 4, 4, 5, 7, 7

now

2, 2, 3, 4, 4, 5, 7, 7

Now you have 2 4's left

So you do: \frac{4+4}{2} =4

Therefore your answer is 4.

<span />
kherson [118]3 years ago
4 0
the median is 4. All you do is put the numbers in order smallest to biggest then cross one of from each side until one number is left in the middle.
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Semeet uses 0.4 gallon of gasoline each hour moving lawns. how much gas does she use in 4.2 hours
laiz [17]

Answer:

I think the answer is 1 gallon of gas

Step-by-step explanation:

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3 years ago
Suppose the mean height for adult males in the U.S. is about 70 inches and the standard deviation is about 3 inches. Assume men’
nlexa [21]

Question options :

a. They should be between 64 and 76 inches tall.

b. They should be close to the height that is 95% of the mean. That is, 66.5 inches, plus or minus 2 standard deviations.

c. They should be at or below the 95th percentile, which is 74.92 inches.

d. None of the above.

Answer: a. They should be between 64 and 76 inches tall.

Step-by-step explanation:

Given the following :

Assume men's height follow a normal curve ; and :

Mean height = 70 inches

Standard deviation= 3 inches

According to the empirical rule ;

Assuming a normal distribution with x being random variables ;

About 68% of x-values lie between -1 to 1 standard deviation of the mean. With about 95% of the x values lying between - 2 and +2 standard deviation of mean. With 99.7% falling between - 3 to 3 standard deviations from the mean.

Using the empirical rule :

95% will fall between + or - 2 standard deviation of the mean.

Lower limit = - 2(3) = - 6

Upper limit = 2(3) = 6

(-6+mean) and (+6+ mean)

(-6 + 70) and (6+70)

64 and 76

8 0
3 years ago
7x - 2 = 2y
ser-zykov [4K]
\left\{\begin{array}{ccc}7x-2=2y\\3x=2y-1\end{array}\right\\\\substitution:\\\\3x=7x-2-1\\3x-7x=-3\\-4x=-3\ \ \ /:(-4)\\x=\frac{3}{4}\\\\2y=7\cdot\frac{3}{4}-2=\frac{21}{4}-2=\frac{21}{4}-\frac{8}{4}=\frac{13}{4}\\2y=\frac{13}{4}\ \ \ \ /:2\\y=\frac{13}{8}\\\\Answer:x=\frac{3}{4};\ y=\frac{13}{8}.
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3 years ago
I need help with question 30 please! :)
Nataliya [291]

Answer:

B ∩ (A ∪ C)'

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It's the B part excluding A and C union. Hence,

(A ∪ C)' ∩ B

7 0
2 years ago
1.5x + 1.3x = -8.4<br><br> I just wanted to make sure i got it right I got X = 42
Marianna [84]

Answer:

Hello there! I'm Ashlynn I'm always here to help!

___________________________________________

1.5x+1.3x

Combine 1.5x and 1.3x to get 2.8x.

(2.8x)

Subtract 1 from 1.

2.8x  

0

 

For any term t except 0, t  

0

=1.

2.8×1

For any term t, t×1=t and 1t=t.

2.8

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<em>“Let your unique awesomeness and positive energy inspire confidence in others.” </em>

<em> - </em><em>Anonymous</em>

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3 years ago
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