I really need help with this thanks a lot

Answer:

4,-5

Step-by-step explanation:

Have a nice day

.........

(i) To calculate the probability that the time between buses will be at least 20 minutes,

we need to find the area under the exponential distribution curve for values greater than or equal to 20.

Using the formula for the exponential distribution, we have: P(X ≥ 20) = 1 - P(X < 20) = 1 - e^(-20/20) = 1 - e^(-1) ≈ 0.632, Therefore, the probability that the time between buses will be at least 20 minutes is approximately 0.632.

(ii) To calculate the probability that the time between buses will exceed 20 minutes but will be less than 30 minutes,

we need to find the area under the exponential distribution curve between 20 and 30. Using the formula for the exponential distribution, we have:

P(20 < X < 30) = ∫[from 20 to 30] λe^(-λx) dx
               = [-e^(-λx)] from 20 to 30
               = [-e^(-30/20) + e^(-20/20)]
               ≈ 0.117

Here, T represents the inter-arrival time, λ is the rate parameter (1/mean), and t is the time we want to calculate the probability for. In this case, λ = 1/20 and t = 20 minutes.

P(T >= 20) = e^(-1/20 * 20) = e^(-1) ≈ 0.368

We want to find P(20 < T < 30), which can be calculated as P(T <= 30) - P(T <= 20).

P(T <= 30) = 1 - e^(-1/20 * 30) ≈ 0.776
P(T <= 20) = 1 - e^(-1/20 * 20) ≈ 0.632

P(20 < T < 30) = 0.776 - 0.632 ≈ 0.144

So, the probability that the time between buses will exceed 20 minutes but be less than 30 minutes is approximately 0.144 or 14.4%.

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The number of degrees the minute hand turn between the start time and end time is 120 degrees.

We have,

Start time = 9 : 10

End time = 9 : 30

Now,

The difference between the time.

= 20  minutes

Now,

1 minute = 6 degrees.

So,

20 minutes = 20 x 6 degrees

20 minutes = 120 degrees.

Thus,

The number of degrees the minute hand turn between the start time and end time is 120 degrees.

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The the /ta/ sound is the sound which listeners are likely to report hearing. The option B is correct option.

According to the statement

we have given that the The voice onset time (vot) for the sound /da/ is 17 ms, and the vot for the sound /ta/ is 91 msec. and we have to find the sound which listeners are likely to report hearing.

So, For this purpose, we know that the

Traffic announcement (TA) refers to the broadcasting of a specific type of traffic report on the Radio Data System. It is generally used by motorists, to assist with route planning, and for the avoidance of traffic congestion.

And according to this and the voice onset time is

The brief instant that elapses between the initial movement of the speech organs as one begins to articulate a voiced speech sound and the vibration of the vocal cord.

And according to this

the /ta/ sound is the sound which is the like by the listeners are likely to report hearing.

So, The the /ta/ sound is the sound which listeners are likely to report hearing. The option B is correct option.

Disclaimer: This question was incomplete. Please find the full content below.

Question:

The voice onset time (VOT) for the sound /da/ is 17 ms, and the VOT for the sound /ta/ is 91 msec. When a computer produces a sound with a VOT of 65 msec, listeners are likely to report hearing

a. the /da/ sound

b. the /ta/ sound

c. the /ja/ sound

d. a combination of /ta/ and /da/

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Answer:

314 =4 Pi (r squrared)

Step-by-step explanation:

so second option is the right answer

Ahh i hope im in time to help!

The answer is C, 46

Hope this helped pls mark be brainliest!!!

Answer:

K = 42

Step-by-step explanation:

K/2 = 21

2* k/2 =2*21

k=42

Answer:

The roots of the equation, 3.1·x³ - 2.4·x²+ 6·x - 3 = 4·x² + 3·x + 2,  are;

x = 1.986, x = 0.0392 - 0.9·i, x = 0.0392 + 0.9·i

Step-by-step explanation:

The given equation is 3.1·x³ - 2.4·x²+ 6·x - 3 = 4·x² + 3·x + 2

Which gives;

3.1·x³ - 2.4·x²+ 6·x - 3 - 4·x² - 3·x - 2 = 0

3.1·x³ - 6.4·x²+ 3·x  - 5 = 0

Factorizing online, we get;

3.1·x³ - 6.4·x²+ 6·x + 3·x - 5 = 3.1·(x - 1.986)·(x² - 0.0784·x + 0.812) = 0

Therefore, the possible solutions are;

x - 1.986= 0 or x² - 0.0784·x + 0.812 = 0

The roots of the equation are x² - 0.0784·x + 0.812 = 0 are;

x = 0.0392 - 0.9·i, x = 0.0392 + 0.9·i

Therefore, the roots of the equation, 3.1·x³ - 2.4·x²+ 6·x - 3 = 4·x² + 3·x + 2,  are;

x = 1.986, x = 0.0392 - 0.9·i, x = 0.0392 + 0.9·i.

The ratio of bears:beans: buttons in the simplest form is 7:3:2

Mathematicians use the term "ratio" to compare two or more numbers. It serves as a comparison tool to show how big or tiny an amount is in relation to another.

Weight of sweet bag = 120g

Cost of a sweet bag = 0.89 euros

Number of gummy bears = 14

Number of jelly beans = 6

Number of chocolate buttons = 4

The ratio of bears:beans:buttons = 14:6:4

Dividing the ratio by 2 throughout we get:

Ratio of bears:beans:buttons = 7:3:2

So, In its simplest form, the ratio of bears to beans to buttons is 7:3:2.

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Answer:  2/3

Step-by-step explanation:

Since the line is going through the origin it slope will use the formula  y/x = k where k is the slope. So you can use any point on the number line to determine the slope.

use the point (3,2)  using the formula y/x = k   divide the y by x.

k = 2/3

Answer: 0.67

Step-by-step explanation:

Look at the points (3,2), (6,4), and (9,6)

Answer:

65% of 80, 170% of 30, 82% of 50

Step-by-step explanation:

What is 65% of 80?

Y is 65% of 80

Equation: Y = 65% × 80

Percentage is tenths × 100 so 65/100 is 0.65 and 0.65 × 80

is the same as 65 × 80 divided by 100 so 65 x 80 = 5200 / 100 = 52.00

So your answer is 52 for 65

-----------------------------------------------------------------------------------------

What is 82% of 50?

Y is 82% of 50

Equation: Y = 82% × 50

Percentage is tenths × 100 so 82/100 is 0.82 and 0.82 × 50

is the same as 82 × 50 divided by 100 so 82 x 50 = 4100 / 100 = 41.00

So your answer is 41

-----------------------------------------------------------------------------------------

What is 170% of 30?

Y is 170% of 30

Equation: Y = 170% × 30

Percentage is tenths × 100 so 170/100 is 1.70 and 1.70 × 30

is the same as 170 × 30 divided by 100 so 170 x 30 = 5100 / 100 = 51.00

So your answer is 51

-----------------------------------------------------------------------------------------

Finally, let's line up the answers from least to greatest

52, 51, 41

or

65% of 80, 170% of 30, 82% of 50.

To form a triangle, the set of line segments must satisfy the triangle inequality theorem, which states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side. Therefore, we need to check if the given line segments 8 cm, 4 cm, and 3 cm meet this requirement.

We can start by checking if the sum of the two smaller sides (3 cm and 4 cm) is greater than the largest side (8 cm). 3 cm + 4 cm = 7 cm, which is less than 8 cm. Therefore, these three line segments cannot form a triangle.

In general, for a set of line segments to form a triangle, the largest side must be smaller than the sum of the other two sides. In this case, the line segment of 8 cm is too long compared to the other two sides, which makes it impossible to form a triangle.

In conclusion, there are no line segments that meet the requirements to form a triangle with lengths of 8 cm, 4 cm, and 3 cm.

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Answer:

see explanation

Step-by-step explanation:

Using the rule of exponents

\(\frac{1}{a^{m} }\) ⇔ \(a^{-m}\) , then

\(\frac{2}{x^2}\) = 2 × \(\frac{1}{x^2}\) = 2\(x^{-2}\)

The new balance will be -27.50.

It should be noted that for each day that her checking account balance falls below zero, she is charged by the bank a fee of $7.50 per day.

Since her current balance in the account is –$12.50, the new balance after 2 days will be:

= -12.50 + (-7.50 × 2)

= -12.50 + -15

= -27.50

The balance is -27.50

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Answer:

producers Will grow more chocolate.

Answer:

Step-by-step explanation:

The statements that explain that the table does not represent a probability distribution are:

The sum of the probabilities is (2)/(3).

The probability -(1)/(3) is less than 0.

A probability distribution is a table that shows the probability of each possible outcome of an event. The sum of all the probabilities in a probability distribution must equal 1. In the table you provided, the sum of the probabilities is (2)/(3), which is not equal to 1. Additionally, the probability -(1)/(3) is less than 0, which is not possible for a probability.

The other two statements are not correct. The probabilities can be a mix of fractions and decimals, and the results do not have to be less than or equal to 1. In fact, the results of a probability distribution can be any number between 0 and 1.

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Reason: The sample is biased toward the people who spent the most money. It leaves out people who didn't spend as much money, so the sample is not representative. A better survey method would be to randomly select names out of a hat.

Answer:

AAS

Step-by-step explanation:

There are two pairs of congruent angles, and the pair of congruent sides is not included in between the angles.

Answer:

x= 4, y= -2

Step-by-step explanation:

To solve the system by substitution, start by labelling the two equations:

-4x +5y= -26 -----(1)

y= 3x -14 -----(2)

Since the second equation already has y as the subject of formula, we can substitute equation (2) into (1). This means that we can replace all the 'y's in equation (1) with 3x -4, such that equation (1) will only be in terms of x.

Substitute (2) into (1):

-4x +5(3x -14)= -26

Expand:

-4x +15x -70= -26

11x= 70 -26

11x= 44

Divide both sides by 11:

x= 44 ÷11

x= 4

Substitute x= 4 into (2):

y= 3(4) -14

y= 12 -14

y= -2

The required equation is 6x+7=331 and the no. of students traveling on each bus is 54.

A mathematical equation can be defined in a variety of ways. In its most basic form, an equation is a mathematical statement that shows that two mathematical expressions are equal. 3x + 5 = 14, for example, is an equation in which 3x + 5 and 14 are two expressions separated by a 'equal' sign. One or more variables are used in the most basic and simple algebraic equations in mathematics.

Given data:

Total no. of students: 331

Number of students on bus = 7

No. of buses = 6

Let the no. of the students on each bus be x.

So according to the given condition,
6x+7=331

6x=331-7

6x=324

x=324/6

x=54

Therefore, the required equation is 6x+7=331 and the no. of students travelling on each bus is 54.

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Step-by-step explanation:

Think of absolute value as a distance. For example, |5| can be written as |5 - 0| = 5 since the distance between 5 and zero on the number line is 5. Also, |-5| which is the same as |-5 - 0| is also 5 since the distance between -5 and zero on the number line is 5.

Since you want an absolute value equation with solutions 8 and 18, think of which number is the same distance from both 8 and 18 on the number line? Find the average of 8 and 18, (8 + 18)/2 = 13. 13 is the same distance from both 8 and 18. 13 is 5 units away from both 8 and 18. Now you need an equation that is looking for the numbers x which are 5 units distance from 13.

Therefore,

Hence, the answer is

Answer:

So, A

22 divided by 5

Reduce the expression, if possible, by cancelling the common factors.

Exact Form:

22 /5

Decimal Form:

4.4

Mixed Number Form:

4  and 2 /5

Next, B

Reduce the expression, if possible, by cancelling the common factors.

Exact Form:

7 /8

Decimal Form:

0.875

Step-by-step explanation:

I hope this helps! Have a great day!

Answer:

I have boxed and highlighted the answer. Sorry for the ink to make the answers a bit messy, but the answers are :-

a. 22 ÷ 5 = 4.4

b. 7 ÷ 8 = 0.875

Hope this helps, thank you :) !!

Answer:

Step-by-step explanation:

\( = - 1\)

Answer:

please the question is not complete oo

The other friend was riding at a speed of 4 miles per hour.

First we can start by using the formula:

distance = rate × time

Let's call the distance between the two friends "d" and the rate (or speed) of one of the friends "r". We know that they both started at 8:00 am and met up at 8:30 am, which means they each rode for 0.5 hours.

The total distance traveled by both friends is equal to the distance between them:

d = 7 miles

We also know that one of the friends was riding at a rate of 10 miles per hour. Let's call the rate of the other friend "x".

Using the formula, we can write two equations:

distance = rate × time

For the friend riding at 10 miles per hour

d = 10 × 0.5

d = 5 miles

For the friend riding at "x" miles per hour:

d = x × 0.5

d = 0.5x

Since both friends covered the same distance (7 miles), we can set these two equations equal to each other:

5 + 0.5x = 7

Subtracting 5 from both sides, we get:

0.5x = 2

Dividing both sides by 0.5, we get:

x = 4

Therefore, the other friend was riding at a speed of 4 miles per hour.

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The unit price of the pecans is $0.815 per ounce (rounded to three decimal places).

To calculate the unit price, we divide the total cost of the item by the quantity purchased. In this case, Averi bought a 6-ounce can of pecans for $4.89.

To find the unit price, we divide the total cost ($4.89) by the quantity purchased (6 ounces):

Unit price = Total cost / Quantity purchased

= $4.89 / 6 ounces

To simplify the unit price, we can divide both the numerator and denominator by their greatest common divisor (GCD). In this case, the GCD of 4.89 and 6 is 3.

Dividing both the numerator and denominator by 3, we get: Unit price = ($4.89 / 3) / (6 ounces / 3)

= $1.63 / 2 ounces

Therefore, the unit price of the pecans is $0.815 per ounce (rounded to three decimal places). This means that Averi paid approximately $0.815 for each ounce of pecans she purchased.

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Answer:

14.8g

Step-by-step explanation:

1.8 x 6 + 4

Answer:

14.8 grams

Step-by-step explanation:`

Multiply 1.8 by 6 ( = 10.8 ), then just add the amount ( 4 grams ) to 10.8. Which gives you 14.8 grams in total for the bee humming bird and the nest.

Note:

Hope this helps! Good luck. :)

Lex will need approximately 18.96 units of tile to surround his pool. The perimeter of the quadrilateral is the sum of these lengths.

To find the number of units of tile Lex will need to surround his pool, we can calculate the perimeter of the quadrilateral ABCD.
Given the coordinates of the vertices on the coordinate plane, we can calculate the lengths of the sides:
AB = \(\sqrt((3-0)^2 + (5-4)^2) = \sqrt(9+1) = \sqrt(10)\) = 3.16 units (rounded to the nearest hundredth)
BC = \(\sqrt((5-3)^2 + (-1-5)^2) = \sqrt(4+36) = \sqrt(40)\) = 6.32 units (rounded to the nearest hundredth)
CD = \(\sqrt((2-5)^2 + (-2+1)^2) = \sqrt(9+1) = \sqrt(10)\) = 3.16 units (rounded to the nearest hundredth)
DA = \(\sqrt((2-0)^2 + (-2-4)^2) = \sqrt(4+36) = \sqrt(40)\) = 6.32 units (rounded to the nearest hundredth)
The perimeter of the quadrilateral is the sum of these lengths:
Perimeter = AB + BC + CD + DA = 3.16 + 6.32 + 3.16 + 6.32 = 18.96 units (rounded to the nearest hundredth)
Therefore, Lex will need approximately 18.96 units of tile to surround his pool.

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Lex will need approximately 20.46 units of tile to surround his pool. To find the number of units of tile needed to surround the pool, we need to calculate the perimeter of the pool.

Given the coordinates of the four vertices of the pool:
    A(0, 4)
    B(3, 5)
    C(5, -1)
    D(2, -2)

We can find the length of segment AB using the distance formula:
    \(AB = \sqrt{(3-0)^2 + (5-4)^2} = \sqrt{9 + 1} = \sqrt{10} = 3.16\)units (rounded to the nearest hundredth).

The length of diagonal BD can also be found using the distance formula:
    \(BD = \sqrt{(2-3)^2 + (-2-5)^2} = \sqrt{1 + 49} = \sqrt{50} = 7.07\) units (rounded to the nearest hundredth).

Since angles A and C are right angles, we know that the opposite sides AB and CD are parallel. Similarly, the opposite sides AD and BC are parallel.

The perimeter of the pool is the sum of the lengths of all four sides:
    Perimeter = AB + BC + CD + AD
                      = 3.16 + BD + 3.16 + BD
                      = 6.32 + 7.07 + 7.07
                      = 20.46 units (rounded to the nearest hundredth).

Therefore, Lex will need approximately 20.46 units of tile to surround his pool.

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