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FromTheMoon [43]
3 years ago
15

Rewrite x2 − 8x + 13 = 0 in the form (x − a)2 = b, where a and b are integers, to determine the a and b values. A: a = 4 and b =

3 B: a = 3 and b = 2 C: a = 2 and b = 1 D: a = 1 and b = 4
Mathematics
2 answers:
natima [27]3 years ago
5 0
The answer for this problem is D
Novosadov [1.4K]3 years ago
4 0

Answer:

After solving this question correct answer is (A)

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4.5 miles per hour

Step-by-step explanation:

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3 years ago
A researcher wishes to​ estimate, with 99​% ​confidence, the population proportion of adults who think the president of their co
scoray [572]

Answer:

a. n=4148

b. n=3909

c. The sample size is smaller if a known proportion from prior study is used. The difference in sample sizes is 239

Step-by-step explanation:

a. For sample where no preliminary estimate is given, the minimum sample size is calculated using the formula:

n=p(1-p)(\frac{z}{ME})^2

Where:

  • ME=Margin of error
  • p= is the assumed proportion

#Let p=0.5, substitute in the formula to solve for n:

n=0.5(1-0.5)\times (2.576/0.02)^2\\\\=4147.36\approx 4148

Hence, the minimum sample size is 4148

b. If given a preliminary estimate p=0.38, we use the same formula but substitute p with the given value:

n=p(1-p)(z/ME)^2\\\\=0.38(1-0.38)(2.576/0.02)^2\\\\=3908.47\approx3909

Hence, the minimum sample size is 3909

c. Comparing the sample sizes from a and b:

n_{0.5}>n_{0.38}\\\\n_{0.5}-n_{0.38}=4148-3909=239

Hence, the actual sample size is smaller for a known proportion from prior a prior study.

8 0
3 years ago
6x4=8xN<br><br> How can I solve this
Nookie1986 [14]

6×4=24 right so than how many 8 can get you to 24, so you do 8,16,24 or 8×3 So it's 8×3=24 (Your welcome ^.^)


3 0
3 years ago
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M + 5n = p solve for m
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-5n on both sides
M= -5n + p
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3 years ago
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Michael drinks 355 milliliters of orange juice and puts 6 centiliters of syrup on his pancakes for breakfast. How many millilite
Brrunno [24]
6 centilitre = 60 millilitre

Total liquid consumed = 355ml + 60ml = 415 mlillilitres
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3 years ago
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