A student has some $1 and $5 in his wallet he has a total of 18 bills that are worth $58 how many of each type of belt does he have

Answer:

x=16

Step-by-step explanation:

If you are using a calculator, simply enter 20×100÷125, which will give you the answer.

We have, 125% × x = 20

Multiplying both sides by 100 and dividing both sides by 125,

we have x = 20 × 100/125

To get a good grade on a quiz, there are several things you can do to prepare for it. Here are some tips that will help you succeed in a quiz.

1. Read the instructions carefully.

2. Manage your time effectively.

3. Review the material beforehand.

4. Focus on the questions.

5. Check your work.

To get a good grade on a quiz, there are several things you can do to prepare for it. Here are some tips that will help you succeed in a quiz.

1. Read the instructions carefully. Before you begin taking the quiz, make sure you read the instructions carefully. This will help you understand what the quiz is all about and what you need to do to complete it successfully. If you don't read the instructions, you may miss important details that could affect your performance.

2. Manage your time effectively. To do well on a quiz, you need to manage your time effectively. Start by setting a time limit for each question. This will help you stay on track and ensure that you don't run out of time before completing the quiz.

3. Review the material beforehand. It's important to review the material beforehand so that you can be familiar with the content that will be covered in the quiz. You can do this by reviewing your notes, reading the textbook, or attending a study group. This will help you remember the information more easily and answer questions more accurately.

4. Focus on the questions. To do well on a quiz, you need to focus on the questions. Read each question carefully and try to understand what it's asking. If you're not sure about a question, skip it and come back to it later.

5. Check your work. Before you submit your quiz, make sure you check your work. Double-check your answers to ensure that you have answered all of the questions correctly. This will help you avoid careless mistakes that could cost you points.

By following these tips, you can do well on your quiz and achieve a good grade. Remember to stay focused, manage your time effectively, and review the material beforehand.

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The values of the trigonometric identities are;

1. tan X = 10/17

2.  tan X = 29/25

3. sin A = 24/25

4. tan C = 15/17

5. sin A = 8/17

6. cos A = 9/41

7. cos Z = 3/4

Note that fractions are the part of a whole number.

Also,

sin θ = opposite/hypotenuse

cosθ = adjacent /hypotenuse

tan θ = opposite/adjacent

1. tan X = opposite/ adjacent

tan X = 30/21 = 10/7

2. tan X = 29/25

3. sin A = opposite/hypotenuse

sin A = 24/25

4. tan C = opposite/adjacent

tan C = 30/34

tan C = 15/17

5. sin A = 16/34

sin A = 8/17

6. cos A = adjacent/hypotenuse

cos A = 9/41

7. sin A = 21/35

8. cos Z = 21/28

cos Z = 3/4

Hence, the fractions takes the function of the trigonometric identities.

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Answer:Look Down 0D

Step-by-step explanation:I am sorry if this doesn't help but I dont know the answer???

a) The angle between vectors A and B is approximately 154.68 degrees.To find the angles between the vectors A and B,

we can use the dot product formula and the fact that the dot product of two vectors A and B is given by:

A · B = |A| |B| cos(θ)

where |A| and |B| represent the magnitudes of vectors A and B, respectively, and θ is the angle between them.

Let's calculate the angles for each case:

(a) A = 2î − 7ĵ, B = -5î + 3ĵ:

Using the dot product formula:

A · B = (2)(-5) + (-7)(3) = -10 - 21 = -31

The magnitude of A:

|A| = √(2^2 + (-7)^2) = √(4 + 49) = √53

The magnitude of B:

|B| = √((-5)^2 + 3^2) = √(25 + 9) = √34

Now, we can calculate the angle θ using the formula:

-31 = (√53)(√34)cos(θ)

Simplifying:

cos(θ) = -31 / (√53)(√34)

Using inverse cosine (arccos) to find θ:

θ = arccos(-31 / (√53)(√34))

The angle between vectors A and B is approximately θ = 154.68 degrees.

(b) A = 6î + 4ĵ, B = 3î − 3ĵ:

Using the dot product formula:

A · B = (6)(3) + (4)(-3) = 18 - 12 = 6

The magnitude of A:

|A| = √(6^2 + 4^2) = √(36 + 16) = √52 = 2√13

The magnitude of B:

|B| = √(3^2 + (-3)^2) = √(9 + 9) = √18 = 3√2

Now, we can calculate the angle θ using the formula:

6 = (2√13)(3√2)cos(θ)

Simplifying:

cos(θ) = 6 / (2√13)(3√2) = 1 / (√13)(√2)

Using inverse cosine (arccos) to find θ:

θ = arccos(1 / (√13)(√2))

The angle between vectors A and B is approximately θ = 23.38 degrees.

(c) A = 7î + 5ĵ, B = 5î − 7ĵ:

Using the dot product formula:

A · B = (7)(5) + (5)(-7) = 35 - 35 = 0

The magnitude of A:

|A| = √(7^2 + 5^2) = √(49 + 25) = √74

The magnitude of B:

|B| = √(5^2 + (-7)^2) = √(25 + 49) = √74

Now, we can calculate the angle θ using the formula:

0 = (√74)(√74)cos(θ)

Since the dot product is zero, it indicates that the vectors are orthogonal (perpendicular) to each other. In this case, the angle between vectors A and B is θ = 90 degrees.

Therefore, for the given cases:

(a) The angle between vectors A and

B is approximately 154.68 degrees.

(b) The angle between vectors A and B is approximately 23.38 degrees.

(c) The angle between vectors A and B is 90 degrees.

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There are 360 black counters and 306 white counter in 20:17 ratio.

Let's denote the number of black counters by B and the number of white counters by W. We know that the ratio of black to white counters is 20:17, which means that:

B/W = 20/17

We also know that there are 54 more black counters than white counters, which means that:

B = W + 54

We can use substitution to solve for B. Substituting the second equation into the first equation, we get:

(W + 54)/W = 20/17

Cross-multiplying, we get:

17(W + 54) = 20W

Expanding the left side, we get:

17W + 918 = 20W

Subtracting 17W from both sides, we get:

918 = 3W

Dividing both sides by 3, we get:

W = 306

Now we can use the second equation to find B:

B = W + 54 = 306 + 54 = 360

Therefore, there are 360 black counters in the bag.

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Jane travels 8 miles much farther than her trainer. The solution is obtained using arithmetic operations.

What are arithmetic operations?

By combining operands with one arithmetic operator, an arithmetic operation is given. The built-in functions add, subtract, divide, and multiply additionally allow for the specification of arithmetic operations.

3. Using pythagoras theorem, we get the equation as D² = 12² + 16².

⇒D² = 144 + 256

⇒D² = 400

⇒D = √400

⇒D = 20

4. Jane has traveled 28 miles in total whereas her trainer has traveled 20 miles.

So, the difference is 28-20= 8 miles

Hence, Jane travels 8 miles much farther than her trainer.

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A. the average waiting time is equal to half of the interval, which is (15 minutes) / 2 = 7.5 minutes. B. the probability that Susan will have to wait at least 2 more minutes is approximately 0.5333. and C. the average time that John has to wait for the next bus is 15 minutes.

a) The distribution of Susan's waiting time until the next bus arrives follows a uniform distribution. Since Susan arrives at a random time and the buses always arrive exactly on time with a fixed interval of 15 minutes, her waiting time will be uniformly distributed between 0 and 15 minutes.

The average time Susan has to wait can be calculated by taking the average of the waiting time distribution. In this case, since the waiting time follows a uniform distribution, the average waiting time is equal to half of the interval, which is (15 minutes) / 2 = 7.5 minutes.

b) If the bus has not yet arrived after 7 minutes, Susan's waiting time can be modeled as a truncated uniform distribution between 7 and 15 minutes. To find the probability that Susan will have to wait at least 2 more minutes, we calculate the proportion of the interval from 7 to 15 minutes, which is (15 - 7) / 15 = 8 / 15 ≈ 0.5333. Therefore, the probability that Susan will have to wait at least 2 more minutes is approximately 0.5333.

c) In John's village, where the buses are unpredictable and the time until the next bus arrives follows an exponential random variable with a mean of 15 minutes, the waiting time of John until the next bus arrives follows an exponential distribution.

The average time that John has to wait can be directly obtained from the mean of the exponential distribution, which is given as 15 minutes in this case. Therefore, the average time that John has to wait for the next bus is 15 minutes.

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Answer:

8 in

Step-by-step explanation:

Area of a square = l×w

Since it is a square then l and w are equal to each other.

So we can instead just say l^2 = A

l^2 = 68.2

l = square root of 68.2

l = 8.26

C

The mistake the arrangers made is in the second inequality. They considered the number of caps to be bought should be at least 5 times greater than the number of blouses, not the other way around. The correct inequality should be C

The correct answer is D) The first inequality should be s + h ≤ 1800.

The organizers made an error in the first inequality. The given inequality 10s + 8h ≤ 1800 represents the total cost of buying shirts (10s) and hats (8h) should be less than or equal to $1800. However, this does not take into account the fact that the organizers want to buy at least 5 times as many shirts as hats, as indicated by the second inequality h ≥ 5s.

The correct way to represent this constraint is by using the equation s + h ≤ 1800, which ensures that the total number of shirts and hats purchased does not exceed $1800 in cost. This is because the organizers want to make sure that the total cost of shirts and hats combined does not exceed the budget of $1800.

The probability that all the students selected are boys is 18.6%

Given that,

In a class of 12 boys and 9 girls, the teacher selects three students at random to write problems on the board.

To find : What is the probability that all the chosen students will be male? (Give a four-place rounding for your response.)

P.( Boy ) = 12

P.( Boy )  = 12/12 + 9

P ( All the students selected are boys )=(12/21)³

= 0. 18658

= 0. 1866

Therefore, the probability that all the students selected are boys is 18.6%

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Answer:

If you study for 2 hours, with 20-25 minutes of studying and a 5-minute break, you will study for approximately 80-100 minutes. This is because in one hour, there are three sets of 20-25 minutes of studying and two sets of 5-minute breaks. Therefore, in two hours, there will be six sets of 20-25 minutes of studying and four sets of 5-minute breaks. Thus, the total time spent on breaks would be around 20 minutes (4 x 5), leaving approximately 80-100 minutes for studying.

Answer:

90 or sum mins

Step-by-step explanation:

Around 90 lol

:)

From the calculation, you are 100 m away from the plateau.

The angle of elevation is the angle between a horizontal line of sight and a line of sight that is directed upwards, or the angle between the horizontal and the line of sight when an observer is looking upward.

We know that;

Angle of elevation = 35°

Height of the Plateau = 70 m

Thus;

Tan 35 =70/x

x = Your distance from the plateau.

x = 70/Tan 35

x = 100m

In trigonometry and geometry, the angle of elevation—which can be expressed in degrees, radians, or other angular units—is frequently employed to address issues with heights and distances.

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Answer:

840000 K's

Step-by-step explanation:

Since 5T = 1000K then T = 1000K/5 which is T = 200K. Multiply both sides by 4200 so you can find how many K's needed for 4200T's.

\(\displaystyle{4200T=200K\cdot 4200}\\\\\displaystyle{4200T=200K\cdot 4200}\\\\\displaystyle{4200T=840000K}\)

Therefore, you need 840000 K's for 4200T's.

Answer:

840 000 K

Step-by-step explanation:

 5 T = 1000k

4200 T = ? K

⇒4200 × 1000 ÷ 5

⇒840 000 K answer.

hope that helps...

Answer:

researcher B with 15 participants will be associated with a larger standard error

Step-by-step explanation:

Standard error can be expressed mathematically as;

E = zr/√n ......1

Where

z = z value of test statistics

r = standard deviation

n = number of samples

From equation 1, given that the standard deviation and the z value for the two researchers are thesame, then we can say;

E = zr/√n

E = k/√n

E1/E2 = √(n2/n1)

n1 = 25

n2 = 15

E1/E2 = √(15/25)

E1/E2 = 0.774596669241

E1 = 0.77E2

Therefore, E1 is less than E2

E1 < E2

And also the larger the number of samples the lower the standard error.

Since researcher B have a lower number of samples it will have a larger standard error.

So, researcher B with 15 participants will be associated with a larger standard error

A simple way to find points is plugging numbers into x and getting y. For example:

                                               y = -9/5(5) - 9

                                               y = -9        - 9

                                               y = -18

So, your points for this example would be (5, -18)

Also, I know this isn't on the graph, but finding 5 points on this aren't always exactly on the point, but here are five points anyway:

(0, -9), (-5, 0), (-10, 9), (-1, -7.2), and (2, -12.6).  

Answer:

below

Step-by-step explanation:

Part A)

The radius of a circle is half of its diameter.

Therefore, the radius of the circle is:

radius = diameter/2 = 8cm/2 = 4cm

So, the radius of the circle is 4cm.

You can also find radius by just dividing the diameter in half, or by 2.

Part B)

The area of a circle can be found using the formula:

Area = πr^2

where π is the mathematical constant pi (approximated as 3.14), and r is the radius of the circle.

Substituting the values given in the question, we get:

Area = πr^2

= 3.14 × (4cm)^2

= 3.14 × 16cm^2

Therefore, the area of the circle is:Area = 50.24cm^2 (rounded to two decimal places)

So, the area of the circle with a diameter of 8cm is 50.24cm^2.

Answer: C outside of the circle

Step-by-step explanation:

The answer is c because

point 4, -1 falls outside of the

circle.

Hope this helps :)

Answer:

Its on the circle

Step-by-step explanation:

Answer:

3 hours

Step-by-step explanation:

24/7 = 3.42 hours and rounded that will be 3 hours

The probability that Carmella will pay for the tickets is greatest, approximately 50%, if Ben selects his tile randomly.

Now, let's calculate the probability of Carmella paying for the tickets based on the different methods that Ben can use to select his tile.

If Ben selects his tile randomly, then the probability of him selecting an even-numbered tile is 3/6, or 1/2. This is because there are three even-numbered tiles (2, 4, and 6) and six total tiles. Similarly, the probability of Ben selecting an odd-numbered tile is also 1/2, as there are three odd-numbered tiles (1, 3, and 5).

So, the probability of Carmella paying for the tickets if Ben selects his tile randomly is 1/2, or approximately 50%.

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Answer:

115 lbs = 52.16 kilograms

Step-by-step explanation:

115 pounds is a little over 52kg

Answer:

Step-by-step explanation:

2. (5-y) (-2y)

-10y + 2y^2

3. (-5v) (5-4v+5v^2)

-25v + 20v^2 -25v^3

4. 7y (y^2-y+5)

7y^3 - 7y^2 + 35y

Answer:

I believe its either 20 or 14

a. The proportion of days with more than 650 hits is approximately 0.0808.

b. The proportion of days with between 580 and 650 hits is approximately 0.6772.

c. The number of hits such that only 15% of the days will have fewer hits is approximately 406.36.

To solve these questions, we will use the standard normal distribution and the z-score.

a. To find the proportion of days with more than 650 hits, we need to calculate the z-score for 650 and find the area under the standard normal curve to the right of that z-score.

First, calculate the z-score:

z = (x - μ) / σ

z = (650 - 510) / 100

z = 1.4

Using the standard normal table or a calculator, we find the area to the right of the z-score 1.4 is approximately 0.0808.

Therefore, the proportion of days with more than 650 hits is 0.0808 (rounded to four decimal places).

b. To find the proportion of days with between 580 and 650 hits, we need to calculate the z-scores for 580 and 650 and find the area between these two z-scores under the standard normal curve.

First, calculate the z-score for 580:

z1 = (580 - 510) / 100

z1 = 0.7

Next, calculate the z-score for 650:

z2 = (650 - 510) / 100

z2 = 1.4

Using the standard normal table or a calculator, we find the area to the right of z1 (0.7) is approximately 0.7580, and the area to the right of z2 (1.4) is approximately 0.0808. To find the area between these two z-scores, we subtract the smaller area from the larger area:

0.7580 - 0.0808 = 0.6772

Therefore, the proportion of days with between 580 and 650 hits is 0.6772 (rounded to four decimal places).

c. To find the number of hits such that only 15% of the days will have fewer hits, we need to find the z-score that corresponds to the cumulative probability of 0.15 (15%).

Using the standard normal table or a calculator, we find that the z-score corresponding to a cumulative probability of 0.15 is approximately -1.0364.

Now, we can use the z-score formula to find the number of hits:

z = (x - μ) / σ

-1.0364 = (x - 510) / 100

Solving for x:

x - 510 = -1.0364 * 100

x - 510 = -103.64

x = 510 - 103.64

x ≈ 406.36

Therefore, the number of hits such that only 15% of the days will have fewer hits is approximately 406.36.

In summary:

a. The proportion of days with more than 650 hits is approximately 0.0808.

b. The proportion of days with between 580 and 650 hits is approximately 0.6772.

c. The number of hits such that only 15% of the days will have fewer hits is approximately 406.36.

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The number of ways 9 yellow marbles can be divided among 4 distinguishable cups is 126.

Dividing 9 marbles among 4 cups is a combination problem. The number of combinations is given by the formula C(n + r - 1, r - 1), where n is the number of items (marbles) and r is the number of groups (cups). In this case, n = 9 and r = 4. Plugging these values into the formula, we get:

C(9 + 4 - 1, 4 - 1) = C(12, 3) = (12 * 11 * 10) / (3 * 2 * 1) = 220

This means that there are 220 ways to divide 9 yellow marbles into 4 distinguishable cups. However, since the cups are distinguishable, each combination is counted multiple times, once for each permutation of the cups. The number of permutations of n items taken r at a time is given by the formula n! / (n - r)!. In this case, the number of permutations is 4! = 4 * 3 * 2 * 1 = 24.

So, the total number of ways to divide 9 yellow marbles into 4 distinguishable cups is 220 / 24 = 9. This means that there are 126 distinct ways to divide 9 yellow marbles among 4 distinguishable cups.

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triangle is the best answer

Answer:

Step-by-step explanation:

Answer:

hope this correct -1/4...............