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ozzi
2 years ago
11

I rlly need help9-3÷1/3+2=?​

Mathematics
2 answers:
dedylja [7]2 years ago
6 0

Answer:

its 10

Step-by-step explanation:

Zina [86]2 years ago
4 0

Answer:

2

Step-by-step explanation:

9-3÷1/3+ 2

9-3/ (1/3)+2

∵3/(1/3)= 9

so,

9-9 +2

0+2= 2

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Which graph shows a proportional relationship between x and y??
Lena [83]

Answer:B

Step-by-step explanation:

B is has a proportional x and y value because they're increasing at the same rate which is 0

6 0
2 years ago
Newborn babies: A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights
Fed [463]

Answer:

a) 615

b) 715

c) 344

Step-by-step explanation:

According to the Question,

  • Given that,  A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 732 babies born in New York. The mean weight was 3311 grams with a standard deviation of 860 grams

  • Since the distribution is approximately bell-shaped, we can use the normal distribution and calculate the Z scores for each scenario.

Z = (x - mean)/standard deviation

Now,

For x = 4171,  Z = (4171 - 3311)/860 = 1  

  • P(Z < 1) using Z table for areas for the standard normal distribution, you will get 0.8413.

Next, multiply that by the sample size of 732.

  • Therefore 732(0.8413) = 615.8316, so approximately 615 will weigh less than 4171  

 

  • For part b, use the same method except x is now 1591.    

Z = (1581 - 3311)/860 = -2    

  • P(Z > -2) , using the Z table is 1 - 0.0228 = 0.9772 . Now 732(0.9772) = 715.3104, so approximately 715 will weigh more than 1591.

 

  • For part c, we now need to get two Z scores, one for 3311 and another for 5031.

Z1 = (3311 - 3311)/860 = 0

Z2 = (5031 - 3311)/860= 2  

P(0 ≤ Z ≤ 2) = 0.9772 - 0.5000 = 0.4772

  approximately 47% fall between 0 and 1 standard deviation, so take 0.47 times 732 ⇒ 732×0.47 = 344.

5 0
2 years ago
Lines DE and AB intersect at point C.
alexandr402 [8]

Answer:

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Step-by-step explanation:

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3 years ago
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Answer:

first 7 then 5 and 27.5

Step-by-step explanation:

4 0
2 years ago
The Blue devils had won 37.5 games. they had played 24 games altogether. how may games had they won?
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The Blue Devils are trying to sell us a bridge and a bill of goods.
But we are sharp, and we are not falling for their story.

We are smart enough to spot two glaring weaknesses in their story.

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3 years ago
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