how do i solve this problem?

40 percent of 140 is equal to 56 and that makes 140 the unknown number

In mathematics, a percentage is a number or ratio that can be expressed as a fraction of 100. If we have to calculate percent of a number, divide the number by the whole and multiply by 100. Hence, the percentage means, a part per hundred. The word per cent means per 100.

We are asked to find 40% of a number which equals 56.

Let the unknown number = x

40/100 = 56/x

0.4 = 56/x

x = 56/0.4

x = 140

The number is 140

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True mean systolic blood pressure for women aged 18-24 falls within the range of 111.3545 to 118.4545 mmHg. The margin of error (ME) of approximately 3.5455 indicates the maximum amount of error we expect in estimating the true population mean based on our sample.

To find the 99% confidence interval (CI) and margin of error (ME) for systolic blood pressures for women aged 18-24, we can use the following information:

Sample size (n): 92

Sample mean (X): 114.9

Sample standard deviation (σ): 13.2

First, let's calculate the standard error (SE) of the mean:

SE = σ / √n

SE = 13.2 / √92 ≈ 1.3762 (rounded to 4 decimal places)

Next, we can calculate the margin of error (ME) using the formula:

ME = z * SE

For a 99% confidence level, the corresponding z-value can be found using a standard normal distribution table or a calculator. The z-value for a 99% confidence level is approximately 2.576.

ME = 2.576 * 1.3762 ≈ 3.5455 (rounded to 4 decimal places)

Now, let's calculate the confidence interval (CI) using the formula:

CI = X ± ME

CI = 114.9 ± 3.5455

The lower bound of the confidence interval is:

Lower bound = 114.9 - 3.5455 ≈ 111.3545 (rounded to 4 decimal places)

The upper bound of the confidence interval is:

Upper bound = 114.9 + 3.5455 ≈ 118.4545 (rounded to 4 decimal places

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Answer:

-300

just do inverse operation, and multiply both sides of the equation by -15 to cancel out the -15 from the denominator and you get V=20(-15)

solve for 20(-15) and you get -300

There is only one solution.

y = x+2

x = -1

Substitute x = -1  in y = x+2

y=-1+2

y = 1

We only get the single value of y and x so It's clear that there's only one solution.

Hello!

surface area

= 2(6*2) + 2(4*2) + 4*6

= 2*12 + 2*8 + 24

= 24 + 16 + 24

= 64 square inches

(a) A^3 = [1 1]

[−4 −1]

(b) BCT = [−21]

[13]

[0 15]

(c) EC + I3 = [−27 3 0]

[−4 7 0]

[0 24 1]

To perform the indicated computations, we'll multiply and add the matrices according to the given operations.

Given matrices:

A = [−3 1]

[2 −1]

B = [0 3]

[−2 7]

C = [7 0]

[−1 3]

[3 3]

E = [1 3 −7]

[−2 1 −3]

[0 2 6]

I3 = identity matrix of size 3x3

(a) A^3:

To calculate A^3, we need to multiply matrix A by itself three times:

A^2 = A * A

A^3 = A^2 * A

A^2 = [-3 1] [−3 1] [-11 2]

[2 −1] * [2 −1] = [−2 1]

A^3 = [-11 2] [−3 1] [1 1]

[−2 1] * [2 −1] = [−4 −1]

The result is:

A^3 = [1 1]

[−4 −1]

(b) BCT:

To calculate BCT, we need to multiply matrix B by matrix C and then transpose the result:

BCT = (B * C)^T

B * C = [0 3] [7 0] [−21 0]

[−2 7] * [−1 3] = [13 15]

Transposing the result:

(B * C)^T = [−21 0]^T [−21]

[13 15]^T = [13]

[0 15]

The result is:

BCT = [−21]

[13]

[0 15]

(c) EC + I3:

To calculate EC + I3, we need to multiply matrix E by matrix C and then add the identity matrix I3:

EC = E * C

E * C = [1 3 −7] [7 0] [−28 3]

[−2 1 −3] * [−1 3] = [−4 6]

[0 2 6] [3 3] [0 24]

Adding the identity matrix:

EC + I3 = [−28 3] [1 0 0] [−27 3 0]

[−4 6] + [0 1 0] = [−4 7 0]

[0 24] [0 0 1] [0 24 1]

The result is:

EC + I3 = [−27 3 0]

[−4 7 0]

[0 24 1]

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Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

Add me

name try a new game"/

Answer:

1/2

Step-by-step explanation:

We know that each team has the following:

36Players + 3Coaches + ?Assistants = Sports League

We know that the ratio of assistants to players is 1/6, rewrite the equation accordingly:

36Players + 3Coaches + 6Assitants = Sports League

Now find the ratio of coaches to assistants:

3Coaches / 6Assistants = 1/2

Answer:

Question 4 of 10

Step-by-step explanation:

+20

True. The idea behind the object-oriented approach to software development is to describe a system as a group of interconnected objects that work together to accomplish a certain objective.

The focus of this method is on identifying the system's objects and their interactions, combining data analysis and process analysis into a single step. The original models are improved throughout the iterative analysis and design process until a successful design is reached. The distinction between analysis and design is frequently hazy in object-oriented design, and the two phases are viewed as a continuum rather than as separate ones.

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Answer:

i think c is best I don no probably they gotta get a working to get the answer

The number of ways there are for her to select the starting line-up is 68,640 ways.

1. Center: There are 4 players who can play this position, so there are 4 choices.
2. Right Forward: Since one player has been selected as Center, there are now 13 players remaining. So, there are 13 choices for this position.
3. Left Forward: After selecting the Center and Right Forward, 12 players remain, resulting in 12 choices for this position.
4. Right Guard: With three players already chosen, there are 11 players left to choose from, giving us 11 choices.
5. Left Guard: Finally, after selecting players for the other four positions, 10 players remain, providing 10 choices for this position.

Now, we can calculate the total number of ways to select the starting line-up using the counting principle by multiplying the number of choices for each position:

4 (Center) × 13 (Right Forward) × 12 (Left Forward) × 11 (Right Guard) × 10 (Left Guard) = 68,640 ways

So, there are 68,640 ways for the coach to select the starting line-up.

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Answer:

70 besarse you have to add

The amount of profit, in dollars, the district office will make if 1,200 people attend the School Fair is 30,000.

We have,

From the line of best fit,

We see that,

(100, 2500)

(200, 5000)

(300, 7500)

(400, 10,000)

This means,

When 100 people attend, 2500 amount of money is made.

When 200 people attend, 5000 amount of money is made.

And so on...

Now,

We can make an equation as:

y = mx + c

Take (100, 2500) and (200, 5000).

m = (5000 - 2500) / (200 - 100)

m = 2500/100

m = 25

And,

(100, 2500) - (x, y)

2500 = 25 x 100 + c

2500 = 2500 + c

c = 0

So,

y = 25x

Now,

The amount of profit, in dollars, the district office will make if 1,200 people attend the School Fair.

= 25x

= 25 x 1200

= 30,000

Thus,

The amount of profit, in dollars, the district office will make if 1,200 people attend the School Fair is 30,000.

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Answer:

2 units to the right and 4 units down

Step-by-step explanation:

look at the image below

Answer:

350 sum

Step-by-step explanation:

Answer:

IT'S A !

Step-by-step explanation:

Took the quiz on edge 2022 .

the correct statement is:

"The lines are perpendicular to each other because the graph of y = -6 is a horizontal line with a slope of 0, and the graph of x = dx is a vertical line with an undefined slope."

The equation of line in point-slope form passing through the points

(x₁ , y₁) and (x₂, y₂) with slope m is defined as;

⇒ y - y₁ = m (x - x₁)

Where, m = (y₂ - y₁) / (x₂ - x₁)

Given that;

Find correct statement is true about the graphs of the two lines y=-6 and x = dx

Since, horizontal line with a slope of 0, and the graph of x = dx is a vertical line with an undefined slope.

Therefore, the correct statement is:

"The lines are perpendicular to each other because the graph of y = -6 is a horizontal line with a slope of 0, and the graph of x = dx is a vertical line with an undefined slope."

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An expression which is represented by the diagram (see attachment) is: A. -6 - (-1).

An expression can be defined as a mathematical equation which is used to show the relationship existing between two or more variables and numerical quantities.

By critically observing the diagram (see attachment), we can logically deduce the following information:

In this context, we can the diagram (see attachment) by using the following expression:

-6 - (-1)

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11 books

Step-by-step explanation:

I did 1,048-32x

Answer: B

The diameter is 3, so you have to divide by 2 to get the raduis. After that just plug in the height and radius and that's your answer!

Hope this helped you!

The Binary Search Tree is as follows:

                                                   E

                                            /            \

                                         S                T

                                        /                    \

                                      I                       W

                                   /                            \

                                A                               M

                              /                                    \

                             C                                     G

                              \

                                D

The set of letters is {I, D, S, A, E, T, C, G, M, W} and len (I, D, S, A, a) = 5

Binary Search Tree:The binary search tree based on the alphabetical ordering of the letters is:

post-order sequence is: C, D, A, G, M, I, W, T, S, E.

To draw the binary search tree for the given post-order sequence, follow the steps below:

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To estimate the conditional probabilities for Pr(A = 1|+), Pr(B = 1|+), and Pr(C = 1|+), we need to calculate the probabilities of each event occurring given that the class is positive (+).

Let's analyze the given data and calculate the conditional probabilities:

Out of the 8 instances provided, there are 4 instances where the class is positive (+). Let's denote these instances as +1, +2, +5, and +6.

For Pr(A = 1|+), we calculate the proportion of instances among the positive class where A = 1. Out of the four positive instances, +2 and +5 have A = 1. Therefore, Pr(A = 1|+) = 2/4 = 0.5.

For Pr(B = 1|+), we calculate the proportion of instances among the positive class where B = 1. Out of the four positive instances, +5 has B = 1. Therefore, Pr(B = 1|+) = 1/4 = 0.25.

For Pr(C = 1|+), we calculate the proportion of instances among the positive class where C = 1. Out of the four positive instances, +5 and +6 have C = 1. Therefore, Pr(C = 1|+) = 2/4 = 0.5.

To summarize:

- Pr(A = 1|+) = 0.5

- Pr(B = 1|+) = 0.25

- Pr(C = 1|+) = 0.5

It's important to note that these probabilities are estimated based on the given data. Depending on the context and the underlying distribution of the data, these probabilities might not be accurate representations in other scenarios.

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The unitary method is used to find the unit value of any quantity.

(a)The human heart pumps 300 quarts/hour.

(b) The human heart pumps 4.730 liters/minute.

In order to solve a problem for two different values of a quantity, its unit value is first derived. This method is known as unitary method.

Given that,

Reading on the label is 5quarts/min.

Since, 60 min = 1 hour

Use unitary method to get,

1 min = 1 / 60 hour.

Therefore, pumping of blood in quarts/hour = 5 / (1 / 60)

                                                                         = 5 × 60

                                                                         =  300

Since, 1 quart = 0.946 liter

The pumping of blood in liter/minute = 0.946 × 5

                                                               = 4.730.

Hence, the human heart pumps 300 quarts of blood per hour and 4.730 liter of blood per minute.

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Solution

Step 1:

Step 2:

The area of the rectangular garden = 250 square feet

Final answer

5ft x 50ft

25ft x 10ft

125ft x 2ft

Answer:

the correct option is h < 8.

Step-by-step explanation:

To solve the inequality 10 + h > 2 + 2h, we can simplify the equation and isolate the variable h.

10 + h > 2 + 2h

Rearranging the equation, we can move all terms containing h to one side:

h - 2h > 2 - 10

Simplifying further:

-h > -8

To isolate h, we multiply both sides of the inequality by -1. Remember, when multiplying or dividing by a negative number, the direction of the inequality sign must be flipped.

(-1)(-h) < (-1)(-8)

h < 8

Answer:

tan(57°) = 12/x

x tan(57°) = 12

x = 12/tan(57°) = 7.793

Answer:

x ≈ 7.8

Step-by-step explanation:

using the tangent ratio in the right triangle

tan57° = \(\frac{opposite}{adjacent}\) = \(\frac{12}{x}\) ( multiply both sides by x )

x × tan57° = 12 ( divide both sides by tan57° )

x = \(\frac{12}{tan57}\) ≈ 7.8 ( to the nearest tenth )