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2 years ago

20 points + Brainlest

Mathematics

2 answers:

dolphi86 [110]2 years ago

8 0

Answer:

One answer because it is not a repeating fraction/decimal.

Step-by-step explanation:

Lelechka [254]2 years ago

6 0

Answer:

One solution:(1,2)

Step-by-step explanation:

y = x + 1

/Plug this in for variable y in equation [2]

-2x - (x +1) = -4

-3x = -3

Solve equation [2] for the variable x

3x = 3

x = 1

By now we know this much :

x = 1

y = x+1

Use the x value to solve for y

y = (1)+1 = 2

Hope this helps :D please mark brainliest if correct

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You measure 20 turtles' weights, and find they have a mean weight of 45 ounces. Assume the population standard deviation is 11.5

Naily [24]

Answer: the maximal margin of error associated with a 90% confidence interval for the true population mean turtle weight = 4.23

Step-by-step explanation:

Formula for margin of error : $E=\dfrac{z^*\times (Population\ standard\ deviation)}{\sqrt{Sample\ size}}$

, where z* = Critical z-value.

Given: population standard deviation = 11.5 ounces

Sample size = 20

Z value for 90% confidence level = 1.645

margin of error (E) = $\dfrac{1.645\times11.5}{\sqrt{20}}$

$\approx4.23$

Hence, the maximal margin of error associated with a 90% confidence interval for the true population mean turtle weight = 4.23

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2 years ago

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11Alexandr11 [23.1K]

3 x^{2} - 15x - 42
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3 years ago

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MaRussiya [10]

Answer:

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Step-by-step explanation

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3 years ago

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3 years ago

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