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kirill115 [55]
3 years ago
8

title="2 + \frac{60}{( - 3)} - 5( - 2)" alt="2 + \frac{60}{( - 3)} - 5( - 2)" align="absmiddle" class="latex-formula">
Simplify please ​
Mathematics
1 answer:
luda_lava [24]3 years ago
6 0

Answer: -8

Step by step explanation:

2+60/-3+10

12-20

= -8
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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
Which of the following numbers has an odd number of factors 13,15,25,26?
kvv77 [185]

Answer:

25. Its cubed.

Step-by-step explanation:

7 0
3 years ago
Using the number line above, write the integer that each point represents
zloy xaker [14]

Answer:

E= -6

D=  4

B =- 4

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
What is the solution of the inequality -6x-17≥8x+25
Aleksandr-060686 [28]
-6x -17> 8x + 25.
Get x on one side; Subtract 8x from both sides.
-14x -17 > 25.
Add 17 to both sides to get x by itself.
-14x>42.
Divide both sides by -14 (remember to flip the inequality when dividing by negatives).
x <_ 3 is your solution (line under the inequality).
I hope this helps!
3 0
3 years ago
Read 2 more answers
Tickets for the theater are $5 for the balcony and $10 for the orchestra. If 600 tickets were sold and the total receipts were $
kherson [118]
5x+10y=4750
x+y=600

x=250
y=350

250 theater tickets
350 orchestra tickets
4 0
3 years ago
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