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zalisa [80]
3 years ago
13

Is (-1,2) a solution of the system y>x and x+y=>

Mathematics
1 answer:
valentina_108 [34]3 years ago
8 0
(-1,2) is a solution

y>x

2>-1 is correct

in this case yes

x+y≥x

 -1+2≥-1 

1≥-1 is correct: Yes

in this case no

x+y≥y

1≥2 

is not correct. No


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Answer:

Suppose the heights of 18-year-old men are approximately normally distributed, with mean 71 inches and standard deviation 4 inches.

(a) What is the probability that an 18-year-old man selected at random is between 70 and 72 inches tall? (Round your answer to four decimal places.)

z1 = (70-71)/4 = -0.25

z2 = (72-71/4 = 0.25

P(70<X<72) = p(-0.25<z<0.25) = 0.1974

Answer: 0.1974

(b) If a random sample of thirteen 18-year-old men is selected, what is the probability that the mean height x is between 70 and 72 inches? (Round your answer to four decimal places.)

z1 = (70-71)/(4/sqrt(13)) = -0.9014

z2 = (72-71/(4/sqrt(13)) = 0.9014

P(70<X<72) = p(-0.9014<z<0.9014) = 0.6326

Answer: 0.6326

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3 0
2 years ago
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miss Akunina [59]

Answer:

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7 0
3 years ago
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How to factor the gcf out of a polynomial
Ann [662]

Step-by-step explanation:

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8 0
3 years ago
Which equation is related to this equation w divided by 9 = 14 please help me..
Kisachek [45]
A is the answer. 9=14 is the same as 14/9
6 0
3 years ago
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I NEED HELP ASAP PLEASE!!!
Colt1911 [192]

Answer:

h= 2/3d

Step-by-step explanation:

slope is the change of y value on the change of x value

4/6 = 2/3

3 0
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