All categories

4 years ago

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

You might be interested in

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 $m = 3.4, \mu = \frac{1}{3.4} = 0.2941$

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

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

Red gold has 3 parts gold and one part copper how much carat gold it will be

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

5 0

3 years ago

The cost of three tickets to a movie is at least $20. select an inequality that represents the cost x (in dollars) of each ticke

GREYUIT [131]

Answer:

Step-by-step explanation:

Como quito el ingles

7 0

3 years ago