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denpristay [2]
3 years ago
8

Please help i need the answer asap!!!

Mathematics
2 answers:
IrinaVladis [17]3 years ago
7 0
Choice b because it it now where’s my brainliest
MA_775_DIABLO [31]3 years ago
5 0

Answer:

  • Choice b.

Step-by-step explanation:

Replace (x, y) with (1, 1) and verify if the equations are correct.

You would ignore the x and y in the equations. Testing one of each pair.

  • a. 3 + 2 = 3, incorrect
  • b. 7 + 2 = 9, correct
  • c. 8 + 1 = 7, incorrect
  • d. 8 - 2 = 4, incorrect

It is obvious that only b. is correct.

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A study of 12,000 able-bodied male students at the University of Illinois found that their times for the mile run were approxima
den301095 [7]

Answer:

P (y < 6) = \frac{P(y- \mu)}{\sigma}  \mu}{\sigma} \\\\=P(z

Therefore the probability that a randomly selected student has time for mile run is less than 6 minute is 0.0618

Step-by-step explanation:

Normal with mean 6.88 minutes and

a standard deviation of 0.57 minutes.

Choose a student at random from this group and call his time for the mile Y. Find P(Y<6)

\mu = 6.88

\sigma = 0.57

y ≈ normal (μ, σ)

The z score is the value decreased by the mean divided by the standard deviation

P (y < 6) = \frac{P(y- \mu)}{\sigma}  \mu}{\sigma} \\\\=P(z

Therefore the probability that a randomly selected student has time for mile run is less than 6 minute is 0.0618

3 0
2 years ago
What is the correct answer for evaluate the expression 12 to 2nd power​
Leya [2.2K]

Answer:

144

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Mystery number: The number is less than 190000 and greater than 180000.
Kipish [7]
The answer to it is    
180, 000 <n> 190, 000 
180,000 + 2000 = n = 5000-187, 000 
182,000 = n = 182, 000   
Or,  
 180, 000 <n> 190,000                     
 n + 5000= 187, 000                           n – 2000 = 180, 000 
 n= 187, 000- 5000                             n = 180, 000 + 2000 
 n= 182, 000                                       n= 182, 000 
6 0
3 years ago
PLEASE HELP!!<br> Factor <br> 6x^2-42x-54<br><br> Please show work!
skad [1K]

first, rewrite 54 as 6•9

next, rewrite 42 as 6•7

then, that gets you 6x^2 -6•7x- 6•9

lastly, factor out the common term (6)

and then you get 6(x^2-7x-9)

<u>please mark as brainliet <3</u>

6 0
2 years ago
Thirteen less than eight times a number is three more than four times the number.
Lisa [10]

Answer:

Step-by-step explanation:

Let the number = x

8x - 13 = 4x + 3              Add 13

8x = 4x + 3 + 13             Combine

8x = 4x + 16                   Subtract 4x

8x - 4x = 16                    Combine

4x = 16                           Divide by 4

x = 16/4

x = 4

6 0
3 years ago
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