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DaniilM [7]
3 years ago
7

Need some help with this math problem ​

Mathematics
1 answer:
Makovka662 [10]3 years ago
3 0

Answer:

probably t=40-3h cause of simple math if you don't understand I suggest using khan academy

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The length of life of an instrument produced by a machine has a normal distribution with a mean of 12 months and standard deviat
Vikentia [17]

Answer:

solved

Step-by-step explanation:

Mean = 12

SD = 2

Answer to part 2)  Less than 7 months

P(x < 7)

P(x < 7) = P(z < (7-12)/2) = P(z < -2.5)

This probability can be obtained by referring to the Z table

Thus P(x < 7) = 0.0062

1) Between 7 and 12 months

P(7 < x < 12) = P( x< 12) - P(x < 7)

We have P(x < 12) = 0 ......[because mean = 12]

and P(x < 7) = 0.0062 ...[this we got is part a]

Thus on plugging these values we get

P( 7 < x < 12) = 0.5 - 0.0062 = 0.4938

Thus P(7 < x < 12) = 0.4938

3

6 0
3 years ago
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Find the length of PR
svetlana [45]

Answer:

4(2x+1)

Step-by-step explanation:

Add the expressions 3x-2 and 5x+6

which is 8x+4

since every one of the answers are in distributive form, just take the GCF (Greatest Common Factor) out of both

5 0
3 years ago
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The figure below shows a shaded circular region inside a larger circle:
Fittoniya [83]

Answer:

Step-by-step explanation:

here you go it in there

6 0
3 years ago
HELP!!!! I’LL GIVE THE BRIANLIEST TO WHOEVER GETS IT RIGHT!!!!
Leto [7]

Answer:

13 units

Step-by-step explanation:

D is at (1,6) and C is at (-4,-6)

The distance is found by

d = sqrt(( y2-y1)^2+ (x2-x1)^2))

  = sqrt( ( -6-6)^2 + (-4-1)^2)

  = sqrt(  -12^2 + -5^2)

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6 0
3 years ago
The sum of two numbers is 62, and their difference is 8. What are the numbers
Lemur [1.5K]
Sum of two numbers is 62?
Let's call the two numbers a and b

let's find two same numbers that would add up to 62: 31.
31 + 31 = 62

since it said the difference is 8, we have to add 4 to one number and subtract 4 from another.
31 - 4 = 27
31 + 4 = 35

Therefore, the two numbers following the given rules are 27 and 35
7 0
3 years ago
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