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Alja [10]
3 years ago
5

MATH HELP please i will mark BRAINLIEST

Mathematics
1 answer:
frutty [35]3 years ago
3 0
I hope this helps! Just follow the instructions.

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If the Discriminant of an equation is zero, which of the following is true of the equation?
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Answer:

a) it has one real solution

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3 years ago
If the mean is 298 and standard deviation is 22 what is the probability that a random sample of 42 pregnancies has a mean gestat
anyanavicka [17]

Answer:

The probability is 0.9909.

Step-by-step explanation:

Test statistic (z) = (sample mean - population mean) ÷ (sd/√n)

sample mean = 290 days

population mean = 298 days

sd = 22 days

n = 42

z = (290 - 298) ÷ (22/√42) = -8 ÷ 3.395 = -2.36

The cumulative area of the test statistic is the probability that the mean gestation period is less than 290 days. The cumulative area is 0.9909. Therefore the probability is 0.9909.

7 0
3 years ago
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A coffee stand sells cups of coffee for $6 and cups of tea for $3. Tuesday a total of 75 cups were sold and the total money coll
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Answer:

46 Teas and 29 Coffees

Step-by-step explanation:

46×3= 138

29×6= 174

174+138=312

4 0
3 years ago
Raul plans to run 30 miles this week. He wants to run the same number of miles each day of the week. He says he will run 7/30 mi
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What is the distance between points A and B?
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-4,-3,-2,-1,0
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2 years ago
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