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Pachacha [2.7K]
2 years ago
14

How to verify midpoint using distance formula

Mathematics
1 answer:
Brut [27]2 years ago
7 0

Answer:


Step-by-step explanation:

Suppose you draw line AC and calculate the midpoint of AC.

To verify the correctness of your midpoint, you'd find the distance from A to the midpoint, M, as well as the distance from the midpoint, M, to C.  If these two distances are equal, then you've found that your midpoint calculation was correct.

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If y= 1/2x and x= -14, find y
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Answer:

y=-1/28

Step-by-step explanation:

y=1/2(-14)

y=1/-28

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The pulse rates of 174 randomly selected adult males vary from a low of 39 bpm to a high of 111 bpm. Find the minimum sample siz
Daniel [21]

Answer:

a. The sample size is approximately 97 adults

Step-by-step explanation:

The given parameters are;

The number of adults surveyed, n = 174

The lowest value of the pulse rate = 39 bpm

The highest value of the pulse rate = 111 bpm

The level of confidence used for determining the sample size = 90%

The given sample mean = 3 pm of the population mean

a. The range rule of thumb states that the standard deviation is approximately one quarter (1/4) of the range

The range = 111 bpm - 39 bpm = 72 bpm

Therefore, the standard deviation, σ = 72 bpm/4 = 18 bpm

The sample size, 'N', is given as follows;

N = \dfrac{z^2 \cdot p \cdot q}{e^2}

Where;

N = The sample size

z = The confidence level, 90% (z-score at 90% = 1.645)

p·q = σ² = 18² = 324

e² = 3² = 9

N = \dfrac{1.645^2  \times 324}{3^2} = 97.4169

Therefore the appropriate sample size, N ≈ 97 adults.

8 0
3 years ago
Identify the values of a , b , and c in the following quadratic equation.<br><br> 2 x2 + 3 x + 7 = 0
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n= number
sqar(-1) = i

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