Find the value of this expression if x = -2.
X - 4
X

The characteristic of the classical approach to probability is that the probabilities assume outcomes of an experiment are equally likely , the correct answer is (d) .

The Classical Approach to probability is also known as the "classical method" .

The classical approach is based on the assumption that all outcomes of an experiment are equally likely to occur.

The probability of an event is then calculated by dividing the number of favorable outcomes by the total number of possible outcomes.

This classical approach is often used in situations where the outcomes of an experiment can be clearly defined and enumerated.

Therefore, the correct statement about Classical Approach is in Option(d).

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The given question is incomplete , the complete question is

Which one of the following is a characteristic of the classical approach to probability?

(a) Probabilities are based on outcomes observed from past experiments.

(b) None of the above.

(c) Probabilities are based on opinion.

(d) Probabilities assume outcomes of an experiment are equally likely.

There are 84 boats in the marina using algebraic equation.

We shall represent the number of boats in the marina with the letter x so that we derive an algebraic equation to solve for x as follows:

number of white boats = 3x/4

number of blue boats = 4/7 of (x - 3x/4)

number of blue boats = 4/7 × x/4

number of blue boats = x/7

number of red boats = 9

so that;

3x/4 + x/7 + 9 = x

LCM of the denominators is 28

(21x + 4x + 252)/28 = x

25x + 252 = 28x {cross multiplication}

28x - 25x = 252 {collect like terms}

3x = 252

x = 252/3 {divide through by 3}

x = 84.

Therefore, There are 84 boats in the marina using algebraic equation.

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To find the total number of minutes used, divide $175 by the $.25 per minute charge. This equals 650 minutes, meaning the user had used 650 minutes throughout the month.

$50 initial fee + $.25 per minute = $225

$225 - $50 = $175

$175 / $.25 = 650 minutes

The initial fee for the phone plan was $50, and for every minute used, an additional $.25 was charged. Last month's bill was $225, so subtracting the $50 initial fee from the total cost of the bill leaves $175, which is the cost of the minutes used. To find the total number of minutes used, divide $175 by the $.25 per minute charge. This equals 650 minutes.

The phone plan charges an initial fee of $50 for the month, as well as an additional $.25 for every minute used. Last month's bill was $225, so to find the total number of minutes used, subtract the $50 initial fee from the total cost of the bill. This results in $175, which is the cost of the minutes used. To find the total number of minutes used, divide $175 by the $.25 per minute charge. This equals 650 minutes, meaning the user had used 650 minutes throughout the month.

A user's phone plan last month costed $225, which included an initial fee of $50 plus $.25 for every minute used. After subtracting the initial fee from the total bill cost, $175 was left which was the cost of the minutes used. Dividing this number by the $.25 per minute charge reveals that the user had used 650 minutes.

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Answer:

A preposition

Step-by-step explanation:

Answer:

Q1) The volume of petrol discharged in 3 minutes is approximately 49.88 litres

Q2) The time it takes to fill the tank is approximately 12 hours 37 minutes

Step-by-step explanation:

Q1) The flow rate of fluid from a pipe, 'Q' is given according to the following equation;

\(Q = \dfrac{V}{t} =\dfrac{A \cdot l}{t} = A \cdot \overline v\)

Where;

Q = The flow rate of fluid in the pipe

V = The volume that flows from the pipe in the given time

A = The cross sectional area of the pipe

t = The time it takes a given volume of fluid to flow from the pipe

l = The length of the pipe that the volume that flows in the given time takes in the pipe

\(\overline v\) = The rate at which the fluid flows

For a circular pipe, A = π·r²

r = The radius of the pipe

The given parameters in the question are;

r = 0.6 cm = 0.006 m

\(\overline v\) = 2.45 m/s

Therefore, by plugging in the values, we get;

A = π·r² = π × (0.006 m)²

Q = A·\(\overline v\) = (π × (0.006 m²)) × 2.45 m/s

Q =  (π × (0.006 m²)) × 2.45 m/s

V = Q × t

Where;

t = Time of flow = 3 minutes = 3 minutes × 60 seconds/minute = 180 seconds

t = 180 s

∴ V = Q × t = ((π × (0.006 m²)) × 2.45 m/s) × 180 s = 0.04987592496 m³

V = 0.04987592496 m³

1 m³ = 1,000 l

∴ 0.04987592496 m³ = 0.04987592496 m³ × 1,000 l/m³= 49.87592496 l

∴ V = 0.04987592496 m³ = 49.87592496 l ≈ 49.88 litres

The volume of petrol discharged in 3 minutes, V ≈ 49.88 litres

Q2) The given diameter of the pipe, d = 0.036 m

The rate at which water discharges into the cylindrical tank, \(\overline v\) = 1.1 m/s

The base radius of the cylindrical tank, R = 3.4 m

The height of the cylindrical tank, h = 1.4 m

Therefore, we have;

The radius of the pipe, r = d/2 = 0.036 m/2 = 0.018 m

The cross sectional area of the pipe, A = π·r² = π×( 0.018 m)²

The volume of the cylindrical tank, V = (The base area of the tank) × (The height of the tank)

∴ V = π × R² × h = π × (3.4 m)² × 1.4 m = π·16.184 m³

The flow rate of Q = A × \(\overline v\) = (π×( 0.018 m)²) × 1.1 m/s = π·0.0003564 m³/s

Q = V/t

∴ t = V/Q

Where;

t = The time it takes to fill a volume, 'V', at a flow rate 'Q'

∴ t = V/Q = (π·16.184 m³)/(π·0.0003564 m³/s) = 45409.6520763 s

t = 45409.6520763 s = 12 hours 36 minutes 49 seconds (using an online time converter)

Therefore, The time it takes to fill the tank, t ≈ 12 hours 37 minutes, after rounding to the nearest minute.

Answer:

Here you go!

Step-by-step explanation:

The answer is a 7.29 dollar tip.

Answer:

The total cost will be $43.74

Step-by-step explanation:

To solve the problem we first have to find what is 20% of $36.45.

To do this, multiply 36.45 by .20

36.45 x .20 = 7.29

now that we know how much is the tip, we add that to the bill

36.45 + 7.29 = 43.74

your final answer will be $43.74

Answer:

nobodiuuytddesbjegbj

Answer:

.The cost of one meter of the wire is _Rs18_______.

Step-by-step explanation:

the cost of 19/4 m of wire = Rs.171/2

the cost of 1m of wire = Rs.171/2×4/19=Rs18

Answer:

I think it's number 5 or (5,8)

Step-by-step explanation:

The area of the sector with a central angle of 60 degree and radius of 8 units is approximately 33.5 sqaure units.

A sector of a circle is simply part of a circle made up of an arc and two radii.

The area of a sector of a circle can be expressed as:

Area = (θ/360º) × πr²

Where θ is the sector angle in degrees, and r is the radius of the circle.

From the image:

Measure of central angle θ = 60 degrees

Radius r = 8 units

Plug these values into the above formula and solve for the area:

Area = (θ/360º) × πr²

Area = (60°/360°) × π × 8²

Area = 1/6 × π × 64

Area = 1/6 × π × 64

Area = 33.5 sqaure units.

Therefore, the area is approximately 33.5 sqaure units.

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Answer:

-6w+49

Step-by-step explanation:

w-7(w-7) <-- Distribute the -7

w-7w+49 <-- Combine like terms

-6w+49

Answer:

Length of shortcut  = 15 km

Step-by-step explanation:

Given that;

Length of shortcut is equal to square root of the sum of the squares of the other two sides.

So,

We can find length of shortcut.

Assume:

Length of other two side area 12 km and 13 km

So,

H = √P² + B²

Length of shortcut  = √12² + 13²

Length of shortcut  = √144 + 169

Length of shortcut  = √225

Length of shortcut  = 15 km

Answer:

The probability of boy in seventh child is 1/2, because the possibility of male child is always 50%.

Step-by-step explanation:

The item that would take longer to stop between an aircraft carrier and a row boat at the same velocity is the aircraft carrier .

The variation in weight and force between them generates this outcome. The measure of momentum is determined by the multiplication of mass and velocity. An object with higher mass, such as an aircraft carrier, would possess greater momentum compared to a lighter object like a row boat when moving at equal speed.

The principle of inertia is also relevant in this context. The tendency of a physical object to resist any alteration in its velocity is referred to as inertia. This encompasses modifications to the velocity or trajectory of the entity. An object's inertia increases as its mass increases, and vice versa - smaller objects have less inertia.

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Answer:

90 units

Step-by-step explanation:

circumference C = 2 \(\pi\)r

taking \(\pi\) as 3.

C = 2 × 3 × 15

(15 is the radius of the circle)

C = 90 units

Answer:

90

Step-by-step explanation:

The Answer will be 90 because Pie is being replaced with 3, so it would be like 2(3)(15) which equals to 90.

But If Pie remains pie the equation would look like (2)(3.14)(15) which would turn out to be 94.2

The z-values for the given situations are approximate:

a. The area to the left of z is 0.1827. z = -0.90

b. The area between −z and z is 0.9830. z = 2.17

c. The area between −z and z is 0.2148. z = 0.85

d. The area to the left of z is 0.9997. z = 3.49

e. The area to the right of z is 0.6847. z= -0.48

a. For an area of 0.1827 to the left of z, the corresponding z-value can be found using a standard normal distribution table or a statistical calculator. The z-value is approximately -0.90.

b. To find the z-value for an area between -z and z equal to 0.9830, we need to find the value that corresponds to (1 - 0.9830)/2 = 0.0085 in the upper tail of the standard normal distribution. Using the table or calculator, the z-value is approximately 2.17.

c. Similarly, for an area between -z and z equal to 0.2148, we find the value that corresponds to (1 - 0.2148)/2 = 0.3926 in the upper tail. The z-value is approximately 0.85.

d. For an area of 0.9997 to the left of z, we find the value that corresponds to 0.9997 in the upper tail. The z-value is approximately 3.49.

e. To find the z-value for an area to the right of z equal to 0.6847, we find the value that corresponds to 1 - 0.6847 = 0.3153 in the upper tail. The z-value is approximately -0.48.

In summary, the z-values for the given situations are approximate:

a. -0.90

b. 2.17

c. 0.85

d. 3.49

e. -0.48

These values can be used to determine the corresponding percentiles or probabilities for the standard normal distribution. The values are typically found using standard normal distribution tables or statistical calculators that provide the cumulative probability distribution function (CDF) for the standard normal distribution.

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Henry could only see one line since both lines had the same slope, which means that the graphs of both equations will be identical and hence overlap.

Linear equations in a system 3x + 2y = 4, and 9x + 6y = 12

We must demonstrate why Henry could only make out one line when he plotted the equations 3x-2y=4 and 9x-6y=12 on a graph.

Take the provided linear equation system into consideration.

3x - 2y = 4 ................(1)

9x - 6y = 12 ..................(2)

Due to the fact that equation (2) is a multiple of equation (1), 3 (3x - 2y = 4) = 9x - 6y = 12

The slopes of the provided equations are also same.

Difference with regard to x for equation (1) yields,

additional to equation (2),

With regard to x, we can differentiate to get,

The graphs of both equations will overlap since both lines have the same slope and hence have the same appearance on the graph.

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Answer:

B. X4+ 4x2 +8x is the answer

Step-by-step explanation:

Answer:

B        x4 + 4x2 + 8x

Step-by-step explanation:

(a) ab l 1 bc l = ab + bc

(b) cd l 1 db l = cd - db

(c) db l 2 ab l = 2ab + db

(d) dc l 1 ca l 1 ab = -ab + ca + dc

In each of the given combinations of vectors, we need to add or subtract the given vectors.

In case (a), the vectors are parallel and have the same direction, so we can simply add them to get the resultant vector: ab + bc = ac.

In case (b), the vectors are also parallel and have opposite directions, so we can subtract them to get the resultant vector: cd - db = cb.

In case (c), we need to double the vector db and subtract it from vector ab to get the resultant vector: ab - 2db = ab - db - db = ac - db.

In case (d), we need to add vector dc and subtract vectors ca and ab to get the resultant vector: dc - ca - ab = db. Therefore, the resultant vectors are: (a) ac, (b) cb, (c) ac - db, (d) db.

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Let:

F be the number of five-dollar bills.

T be the number of ten-dollar bills.

Then, follow the steps to find T.

Step 01: Write an equation that represents the total number of bills.

Since 134 is the sum of the bills of five and ten dollars:

Step 02: Write an equation that represents the amount of money the cashier has.

The cashier has $790 dollar, which is equal to F multiplied by 5 plus T multiplied by 10:

Step 02: Isolate F in the equation from step 01 and substitute it in equation from step 02.

To isolate F, subtract T from both sides.

And substituting it in the second equation:

Step 03: Solve the equation from step 02 for T.

Subtract 670 from both sides, then divide the sides by 5.

Step 04: Knowing T, find F using the equation from Step 02.

Answer:

He has 24 ten-dollar bills.

Step-by-step explanation:

please mark me as brainlest

Answer:

x = 33 , y = 82

Step-by-step explanation:

The sum of the 3 angles in Δ ACD = 180° , then

x = 180 - (40 + 107) = 180 - 147 = 33

x + 65 + y = 180° ( sum of angles on a straight line ) , then

33 + 65 + y = 180

98 + y = 180 ( subtract 98 from both sides )

y = 82

Answer:

one is plus + and the other is mines -

Step-by-step explanation:

Answer:

x=20 degrees

Step-by-step explanation:

7x+(x+20)=180

8x+20=180

8x=160

x=20

the discrepancy between the sample mean and the claimed protein content is due to chance error in the measurements

To determine whether the discrepancy between the sample mean and the claimed protein content of 4 grams can be due to chance error in the measurements, we can perform a hypothesis test.

The null hypothesis, H0, is that the true mean protein content is equal to 4 grams. The alternative hypothesis, Ha, is that the true mean protein content is less than 4 grams.

Using a one-tailed t-test with a significance level of 0.05 and four degrees of freedom (n-1=5-1=4), we calculate the t-value to be -1.386. The critical t-value for a one-tailed test at a significance level of 0.05 and four degrees of freedom is -2.132.

Since our calculated t-value of -1.386 is greater than the critical t-value of -2.132, we fail to reject the null hypothesis. This means that we do not have enough evidence to conclude that the true mean protein content is less than 4 grams. Therefore, it is possible that the discrepancy between the sample mean and the claimed protein content is due to chance error in the measurements.

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Hanna's parents will have to spend an additional $5.23 in April compared to January for the same quantity of pasta, yogurt, and lemonade.

a. To compute the total monthly cost of Hanna's meals, we multiply the quantity of each item by its respective price and sum them up.

In January, the total monthly cost is calculated as:

Total cost = (21 pounds of pasta) * ($1.94 per pound) + (57 packages of yogurt) * ($0.96 per package) + (11 bottles of lemonade) * ($1.94 per bottle) = $40.74

In February, the total monthly cost is:

Total cost = (21 pounds of pasta) * ($1.77 per pound) + (57 packages of yogurt) * ($1.06 per package) + (11 bottles of lemonade) * ($2.12 per bottle) = $45.93

In March, the total monthly cost is:

Total cost = (21 pounds of pasta) * ($2.17 per pound) + (57 packages of yogurt) * ($1.06 per package) + (11 bottles of lemonade) * ($1.87 per bottle) = $49.99

In April, the total monthly cost is:

Total cost = (21 pounds of pasta) * ($1.97 per pound) + (57 packages of yogurt) * ($1.16 per package) + (11 bottles of lemonade) * ($1.92 per bottle) = $45.97

To determine whether inflation, deflation, or no inflation occurred during these months, we compare the total monthly costs.

In February, the total monthly cost ($45.93) is higher than January ($40.74), indicating inflation.

In March, the total monthly cost ($49.99) is higher than February ($45.93), indicating inflation.

In April, the total monthly cost ($45.97) is slightly lower than March ($49.99), indicating deflation (negative inflation).

b. To calculate how much more money Hanna's parents will have to spend in April compared to January, we subtract the total cost of January from the total cost of April.

Additional cost in April = Total cost in April - Total cost in January

= $45.97 - $40.74 = $5.23

Therefore, Hanna's parents will have to spend an additional $5.23 in April compared to January for the same quantity of pasta, yogurt, and lemonade.

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Answer:

4+(-9)=(-5)

Step-by-step explanation:

The number of years that will take for the schools to have the same number of students is given as follows:

11 years.

The number of students in each school is modeled by linear functions in slope-intercept format, as follows:

y = mx + b.

In which:

The functions for this problem are given as follows:

They will have the same number of students when:

Sp(t) = Se(t).

Hence:

1074 + 19t = 1206 + 7t

12t = 132

t = 132/12

t = 11 years.

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Answer:

there is 77% more chinese students.

Step-by-step explanation:

subtract the 23% of malay students from the 100% of the students in  the school.

100-23=77

Problem

Findthefollowing androundtothenearesttenth:

a) 90%of whatnumberis 262?

b) Whatpercentof45is329?​

Solution

Part a

For this case we can do the following:

And solving for x we got:

x= 100 (262/90)= 291.1

Part b

For this case we can do the following:

And we can conclude that the answer is 13.68%