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3 years ago

PLEASE HELPP

Mathematics

2 answers:

Strike441 [17]3 years ago

4 0

The answer is 11/5 because when you add that up that’s what you get. #2

Luba_88 [7]3 years ago

4 0

Answer:

1. 11/5

Step-by-step explanation:

Solving in steps:

1/3(y-2) - 5/6(y+1) = 3/4 (y-3) - 2
1/3y - 2/3 - 5/6y - 5/6 = 3/4y - 9/4 - 2
1/3y -5/6y - 3/4y = 2/3 + 5/6 - 9/4 - 2
1/12y(4 - 10 - 9) = 1/12(8 + 10 - 27 - 24)
y*(-15) = - 33
15y = 33
y = 33/15
y = 11/5

Correct option is 1.

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Let x denote the lifetime of a mcchine component with an exponential distribution. The mean time for the component failure is 25

aliina [53]

Answer:

0.1353 = 13.53% probability that the lifetime exceeds the mean time by more than 1 standard deviations

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 mean time for the component failure is 2500 hours.

This means that $m = \frac{2500}, \mu = \frac{1}{2500} = 0.0004$

What is the probability that the lifetime exceeds the mean time by more than 1 standard deviations?

The standard deviation of the exponential distribution is the same as the mean, so this is P(X > 5000).

$P(X > x) = e^{-0.0004*5000} = 0.1353$

0.1353 = 13.53% probability that the lifetime exceeds the mean time by more than 1 standard deviations

4 0

2 years ago

Help me 7th grade math please

Stolb23 [73]

Answer: 13.5 ounce bottle for $2.19

a 29.2 ounce bottle for $5.37

The 29.2 ounce bottle is better

Step-by-step explanation:

13.5 ounce bottle for $2.19

a 29.2 ounce bottle for $5.37

find the ratios

13.5/2.19 = $6.16 per unit

29.2/5.37 = $5.44 per unit

3 0

2 years ago

A shop sells chocolate, vanilla and strawberry ice creams. 45% of the ice creams sold are vanilla, and 1/4 are strawberry. What

Mamont248 [21]

Answer:

30%

Step-by-step explanation:

Since we want percentage, we need to convert 1/4th to percentage first.

We will divide, get decimal, and then multiply by 100 to get percentage.

1/4 = 0.25

0.25 * 100 = 25%

Now, we can say:

45% + 25% + chocolate = 100%

70% + chocolate = 100%

chocolate = 100 - 70 = 30

Chocolate = 30%

6 0

3 years ago

Pleaseeeeee help I’m so confused

SSSSS [86.1K]

Answer:

4747

Step-by-step explanation:

8 0

3 years ago

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The solution to the equation x + 11 = 18 is x = 7. True False

Usimov [2.4K]

Answer:

True

Step-by-step explanation:

X+11=18

subtract 11 from both sides

18-11=7

x=7

5 0

3 years ago

Read 2 more answers