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iren [92.7K]
4 years ago
13

Does anyone know any of these bc my brother needs help and i don’t know!?!?!?

Mathematics
1 answer:
tester [92]4 years ago
8 0

Answer:

the third one all the way to the right

Step-by-step explanation:

the other two have two or more congruent sides and that one doesnt and also the one that doesn'r belong has a right angle and the others dont

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which of the following shows the polynomial below written in decreasing order 5x^3-x+9x^7+4+3x^11 HELLLPPPPPPPPPPPPP a.3x^11+9x^
ValentinkaMS [17]

Answer:

3x^11+9x^7+5x^3-x+4

Step-by-step explanation:

A polynomial written in decreasing order is a polynomial that starts with terms with the highest degree and ends with terms to the lowest degree.

First find the decreasing order of the answer:

5x^3-x+9x^7+4+3x^11

3x^11+9x^7+5x^3-x+4

The answer should be this, but I couldn't find a match for it in the answer box.

7 0
3 years ago
The average lifetime of a certain new cell phone is 3.4 years. The manufacturer will replace any cell phone failing within three
melisa1 [442]

Answer:

68% of these phones last 3.87 years.

Step-by-step explanation:

Exponential distribution:

The exponential probability distribution, with mean m, is described by the following equation:

f(x) = \mu e^{-\mu x}

In which \mu = \frac{1}{m} is the decay parameter.

The probability that x is lower or equal to a is given by:

P(X \leq x) = \int\limits^a_0 {f(x)} \, dx

Which has the following solution:

P(X \leq x) = 1 - e^{-\mu x}

The probability of finding a value higher than x is:

P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}

The average lifetime of a certain new cell phone is 3.4 years.

This means that m = 3.4, \mu = \frac{1}{3.4} = 0.2941

So

P(X \leq x) = 1 - e^{-0.2941x}

68% of these phones last how long (in years)?

This is x for which:

P(X \leq x) = 0.68

P(X \leq x) = 1 - e^{-0.2941x}

Then

0.68 = 1 - e^{-0.2941x}

e{-0.2941x} = 0.32

\ln{e{-0.2941x}} = \ln{0.32}

-0.2941x = \ln{0.32}

x = -\frac{\ln{0.32}}{0.2941}

x = 3.87

68% of these phones last 3.87 years.

4 0
3 years ago
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avanturin [10]

Answer: 0.75 ×24 carat = 18 carat

Step-by-step explanation:

24 carat is 100% pure gold. If there is 3/4 parts of gold it is 75 % = 0.75

5 0
3 years ago
There are four consecutive integers. The sum of the first and third number is 140. what are the integers? please show work:)
marta [7]
69, 70, 71, and 72
69 and 71 are the first and third digits. 69+71=140
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Answer:

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