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3 years ago

3. x2 - 6x + 9 = 0Are the real

Mathematics

1 answer:

liberstina [14]3 years ago

8 0

Answer:

1 real solution: x=3

Step-by-step explanation:

By factoring:

x^2-6x+9=0

(x-3)^2=0

x-3=0

x=3

So yes there's 1 real solution which is x=3.

You can also check the discriminant:

b^2-4ac

(-6)^2-4(1)(9)

36-36

Since the discriminant is 0, there can only be 1 real solution.

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DIA [1.3K]

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3 years ago

Find a 75% confidence interval for the population average weight μ of all adult mountain lions in the specified region. (Round y

kupik [55]

Answer:

75% confidence interval is 91.8±16.66. That is between 75.1 and 108.5 pounds.

Step-by-step explanation:

The question is missing. It is as follows:

Adult wild mountain lions (18 months or older) captured and released for the first time in the San Andres Mountains had the following weights (pounds): 69 104 125 129 60 64

Assume that the population of x values has an approximately normal distribution.

Find a 75% confidence interval for the population average weight μ of all adult mountain lions in the specified region. (Round your answers to one decimal place.)

75% Confidence Interval can be calculated using M±ME where

M is the sample mean weight of the wild mountain lions ( $\frac{69 +104 +125 +129+60 +64}{6} =91.8$ )

ME is the margin of error of the mean

And margin of error (ME) of the mean can be calculated using the formula

ME= $\frac{t*s}{\sqrt{N} }$ where

t is the corresponding statistic in the 75% confidence level and 5 degrees of freedom (1.30)

s is the standard deviation of the sample(31.4)

N is the sample size (6)

Thus, ME= $\frac{1.30*31.4}{\sqrt{6} }$ ≈16.66

Then 75% confidence interval is 91.8±16.66. That is between 75.1 and 108.5

3 0

3 years ago

Christopher can eat 8 bags of skittles in 5 minutes. What is his rate per minute? Round your answer to the nearest hundredth. At

Dennis_Churaev [7]

8/5 = 1.6 bag per minute

8 bags of skittles in 5 minutes
? 10 minutes

8 x 10 / 5
= 80 /5
= 16

answer
1.6 bag per minute
and
16 bags in 10 minutes

7 0

4 years ago

Help help help help help please

iris [78.8K]

Answer:

Step-by-step explanation:

h + 4g

5 + 4(8)

5 + 32 = 37

4 0

3 years ago

Solve: 2x + 27 = 3x - 9

bija089 [108]

Answer:

x = 36

Step-by-step explanation:

2x + 27 = 3x - 9

27 + 9 = 3x - 2x

x = 36

6 0

4 years ago

3. x2 - 6x + 9 = 0Are the real​

3. x2 - 6x + 9 = 0Are the real