A professor wants to randomly select 4 students to go to the board. She decides to
randomly select the sixth student who enters the classroom and every seventh student
after that. Determine the students who will be going to the board. Write down the student
numbers.

The next time they will flash together will be at 4:00 AM.If they flash together at 1:00 AM.

According to the given information we are trying to find the smallest time interval at which both the lighthouses will flash together.The first lighthouse flashes every 15 minutes, and the second lighthouse flashes every 18 minutes.

To find the LCM of 15 and 18, we can list out the multiples of each number and find the smallest multiple that is common to both.
Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, ...
Multiples of 18: 18, 36, 54, 72, 90, 108, 126, 144, ...

As we can see, the smallest multiple that is common to both lists is 90. This means that the two lighthouses will flash together every 90 minutes.Since they both flash at 1:00 AM, we can add 90 minutes to 1:00 AM to find the next time they will flash together:
1:00 AM + 90 minutes = 4:00 AM

So, the next time they will flash together will be at 4:00 AM.

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The equation of the circle into the standard form will be (x + 7)² + (y + 15)² = 1.

It is the close curve of an equidistant point drawn from the center. The radius of a circle is the distance between the center and the circumference.

Let r be the radius of the circle and the location of the center of the circle be (h, k). Then the equation of the circle is given as,

(x - h)² + (y - k)² = r²

The area of the circle is 9π. Then the radius of the circle is given as,

A = π

πr² = π

r² = 1

The center of the circle is at (-7, -15). Then the equation of the circle is given as,

(x + 7)² + (y + 15)² = 1

The equation of the circle into the standard form will be (x + 7)² + (y + 15)² = 1.

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Answer:

1/7

Step-by-step explanation:

5/7 was already traveled so that leaves 2/7.

Thye traveled 1/2 of 2/7 so we multiply them.

1/2 x 2/7 = 2/14

We can simplify this by dividing both sides by 2.

1/7 is the final answer.

Using the leg rule, the value of x in the right triangle is: 42.

The leg rule gives the relationship between the lengths of the segments formed on the hypotenuse of a right triangle by its altitude.

The leg rule is given as:

Hypotenuse/leg = leg/part.

In the image given, we have:

Hypotenuse = x + 8

Leg = 20

Part = 8

Plug in the values:

x + 8 / 20 = 20 / 8

8(x + 8) = (20)(20)

8x + 64 = 400

8x = 400 - 64

8x = 336

x = 336/8

x = 42

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The solution of the system is x = 60 and y = 28.

One or many equations having the same number of unknowns that can be solved simultaneously called as simultaneous equation. And simultaneous equation is the system of equation.

Given:

An algebraic equation,

[tex]a^{x} a^{y} = a^{88}[/tex]

When the base value is the same, we can add the exponents.

x + y = 88

And x - y = 32

Now, we have the system of equations,

Adding both the equations,

2x = 120

x = 60

And y = 28.

Therefore, the values are x = 60 and y = 28.

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The solution to the fractions are;

7. 5/6

8. 6/5

A fraction can be described as the part of a whole variable, number or element.

There are several types of fractions, which includes;

From the information given, we have that;

1 1/3 × 5/12

convert to improper fraction

4/3 × 5/12

Multiply the values

5/6

(7/10 + 1/5) ÷ ( 6/4 - 3/4)

find the lowest common denominators

( 7 + 2 /10) ÷ (6 - 3 /4)

subtract or add the numerators

9/10 ÷ 3/4

take inverse of the divisor and multiply

9/10 × 4/3

6/5

Hence, the values are 5/6 and 6/5 respectively.

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The measure of {x} equals to 8 and ∠WYZ is 32°.

The radian is the unit of angle in the International System of Units and is the standard unit of angular measure used in many areas of mathematics

Given is the figure as shown in the image.

It is given that ∠XYZ = 106°. We can write -

∠XYZ = ∠XYW + ∠WYZ

106 = 70 + 5x - 4

5x + 66 = 106

5x = 40

x = 8

∠WYZ = 5x - 8 = 5 x 8 - 8 = 32°.

Therefore, the measure of {x} equals to 8 and ∠WYZ is 32°.

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The function to find the amount in dollars spent on monthly activities can be represented as: A(x) = (x - 500) * 1/4

Let x be the total monthly budget in dollars and A(x) be the function of x that determines the amount in dollars spent on monthly activities.

To find the value of A(x), we follow the steps:

First, we subtract the fixed monthly transportation cost of $500 from the total budget.

The remaining budget is then divided by 4 to find the amount spent on monthly activities.

Therefore, the function A(x) can be written as: A(x)= (x-500)/4

Thus, the function (x - 500) * 1/4 can be used to find the amount in dollars spent on monthly activities.

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Answer: c=√202

Step-by-step explanation:

c = √(9² + 11²)

which also simplifies to 23.769729

I hope this helps!

Answer:

Step-by-step explanation:

The number of hours Jackson worked washing cars last week is 8 hours

The number of hours Jackson worked landscaping cars last week is 6 hours

The problem is a simultaneous equation of two unknowns with two equations.

The equations are formed as follows

Jackson worked a total of 14 hours

x + y = 14

Jackson earned a total of $152

$10 per hour washing cars and $12 per hour landscaping

10x + 12y = 152

The simultaneous equation

x + y = 14

10x + 12y = 152

using calculator to solve the equation  we have that

x = 8 and y = 6

hence hours of washing cars is 8 hours while hour s of landscaping is 6 hours

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2 packs include 12 baseball cards, and there are 6 baseball cards per pack.

The ratio can be defined as the number that can be used to represent one quantity as a percentage of another. Only when the two numbers in a ratio have the same unit can they be compared. Ratios are used to compare two objects.

given, There are 24 baseball cards In 4 packs complete the table to find the rate that gives the number of cards in 2 packs.

Since

There are baseball cards in 4 packs = 24

Thus,

Baseball cards in 1 pack = 24 / 4

Baseball cards in a pack = 6

Baseball cards in 2 packs = 12

therefore, there are 12 baseball cards in 2 packs also the rate of baseball cards per pack is 6.

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Complete question:

The value of x in the triangle is 8 units.

The midsegment of a triangle is a line connecting the midpoints between two sides of a triangle.

It is parallel to the third side and it is half the length of the third side.

Therefore, DE is the mid segment of the triangle ABC. The value of x can be found as follows:

Using the mid segment rule,

BE = EC

BD = DA

Therefore,

x = 8 units

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Answer:

Step-by-step explanation:

I don't know I'm just asking the question

Answer:4√81=±3

Step-by-step explanation:

If (x+5)^4 = 81,

then (x+5)^2 = ± sqrt(81), so

        (x+5)^2 = ±9

Focusing on (x+5)^2 = 9 for the two real roots, we have

 (x+5)^2 = 9

       x+5 = ± sqrt(9)

       x+5 = ± 3

       x+5 = 3 gives you x = -2

       x+5 = -3 gives you x = -8

There are two complex roots too, but I'm not sure if you're studying that too.   If so, then you'd solve (x+5)^2 = -9:

       x+5 = ± sqrt(-9)

       x+5 = ±3i

       x = 5 ± 3i as the two complex roots.

The number of cards were sold for mother's day is 900 cards.

To calculate a total number using a percentage, first identify the percentage and the total number. Then divide the percentage by 100 to convert it to a decimal fraction. Finally, multiply the total number by the decimal fraction to calculate the total number.

For example, if the percentage is 10% and the total number is 200, first divide 10% by 100 to get 0.1. Then multiply 0.1 by 200 to get 20. The total number is 20.

In another example, if the percentage is 25% and the total number is 500, divide 25% by 100 to get 0.25. Then multiply 0.25 by 500 to get 125. The total number is 125.

It is important to remember that percentages are based on a whole, which is usually 100. Therefore, to use percentages to calculate a total number, it is necessary to first convert the percentage to a decimal fraction by dividing it by 100. Then, multiply the total number by the decimal fraction to calculate the total number.

36 cards is 4% of the total cards sold for Mother's Day.

Total number of cards = 36 / 4%

Total number of cards = 36 x 100/4

Total number of cards = 900 cards.

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The perimeter of the entire figure is 40 inches

It is important to note that the formula for area of a figure is expressed as;

A = a²

Where;

A + A = 100

a² = 100

Take the square root of both sides

a = √100

a = 10 inches

The formula for calculating the perimeter of a square is expressed as;

Perimeter = 4a

Substitute the value of a, we have;

Perimeter = 4(10)

expand the bracket

Perimeter = 40 Inches

Hence, the perimeter is 40 Inches

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The option that is a statistical question is how many miles do the students in your class run each week? (option b)

A statistical question is a question that can be answered by collecting data that have varying values.

For example, the number of miles that the students in your class run each week is statistical question because each student would run. This is because data would be collected from more than one student and the students would have varying miles that they run.

The number of pets your grandparents have is not a statistical questions because they can only have a set number of pets.

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Answer:

B. How many miles do the students in your class run each 

Step-by-step explanation:

A horizontal parabola with a right-facing opening and a vertex at (1,1) is we have positive direction.

In order to make the coefficients of either the variable x or the variable y numerically equal, first multiply both of the following equations by any suitable non-zero constants.

Finding the single equation of a curve in standard form with only the variables xs and ys constitutes the cartesian equation of that curve. You must simultaneously solve the parametric equations in order to arrive to this equation.

X and Y both

are t-related functions.

We have t=y1 after solving y=t+1 to get t as a function of y.

Thus, given x=t2+1, we have x=(y1)2+1x1=(y1) by substituting t=(y1).

A horizontal parabola with a right-facing opening and a vertex at (1,1) is what we have positive direction.

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Answer: 0.2m/h

Step-by-step explanation: We can say when the turtle travels 1/10 of a mile in 1/2 of an hour, he's traveled 0.1 miles in 30 minutes.

If you're looking for the turtle's rate in miles per hour, just double both the time and the distance traveled.

You will end up with 0.2 miles per hour or 2/10 of a mile per hour.

As per the unitary method, the charge for each job in order to break even at the end of the third job is $3,000

In math the term unitary method is known as a single unit and then multiply the value of a single unit to the number of units to get the necessary value.

Here we have given that John is starting a roofing business. He will need to buy a truck and some supplies to get his business going.

And here we we have also known as the truck costs $13000 used.

The value of truck is 13000 and material for all 3 jobs is 3000

Here we have also know that each job takes 5 days for a total of 15 days

workers get paid 125 dollars a day.

As we all know that each worker gets 125 a day.

Then here we have also know that each job requires 5 days so he pays each worker 625 per job.

Then he has them work on 3 jobs, and then he pays each worker 1875 for all 3 jobs.

Where here he has 2 workers so he pays out 3750 in total to the workers for all 3 jobs.

Then the total cost is calculated as,

=> $13,000 for the truck

=> $3,000 for the material

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The approximate area (shaded region) of the remaining portion of the circle in square feet is 55.94 ft².

We know that,

the side of square=2*[r*√2/2]=r*√2 that is being taken out.

diameter = 14 ft and radius , r = 7 ft.

the side of square=7*√2=9.89 ft

[area of the remaining portion of the circle]=[ area of a circle]-[area of a square]

[area of a square] = (7√2)²=98 ft²

[ area of a circle] = π*r²= π x 7^2 = 153.94 ft²

therefore,

[area of the remaining portion of the circle]=153.94 - 98=55.94 ft²

the answer is 55.94 ft².

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The distance PR across the river is 177 feet

The complete question is added as an attachment

From the question, we have the following parameters that can be used in our computation:

The equivalent ratio represented as

PR : 125 = PR + 170 : 245

Express the ratio as a fraction

So, we have the following representation

PR/125 = (PR + 170)/245

Cross multiply

This gives

245PR = 125PR + 21250

Evaluate the like terms

120PR = 21250

Divide both sides by 120

PR = 177

Hence, the distance is 177 feet

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The mean of the copper measured is 45.747. when the mass of copper is 45.750.

Average Absolute Deviation:

The average deviation is a statistic that measures the absolute difference of each measurement from the mean value and then gets its average.

It also includes both the mean absolute deviation and the median absolute deviation and also defines the data set as the average of the absolute deviations from a central point.

This is given by the formula:

Average Deviation=∑ni=1|x−¯x|

where:

x is the observed value

¯x is the mean value

n is the number of observations

Computing for the mean of balance 1:

¯x=45.747+45.745+45.748/3

¯x=45.747

Computing for the mean of balance 2:

¯x=45.76+45.77+45.74/3

¯x=45.79

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Answer

see attached

Step-by-step explanation:

x-2y = 8 means x = 8+2y.  so when y =0, x = 8; when y=1, x =10. draw a line with these 2 points.

Same with x - 2y = 4 ==> x = 4+2y.  so when y=0, x = 4, when y=1, x=6, draw a line with these 2 points.

A function g that determine the point's x-coordinate in terms t.

g(t) = r .cos (2.t).

Now, According to the question:

The input variable and output variable are also called the domain and the range. The domain of a function is the set of all values that will work in the function, which are the inputs. The range of a function is the set of all possible outputs produced by the function. In the example above, the 3 would be part of the range and the 8 would be part of the domain.

Input data

A point started at the location (-4, 0)

and, moves CCW along a circle centered at (0, 0)

angular speed = 2 rad/s

Procedure

The value of x is equal to the cosine of the swept angle time radius.

We can calculate the swept angle as 2×t

g(t) = r .cos (2.t).

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The given question is incomplete.

For the complete question, To see the attachment.

The value of n=36 months.

It is given that the population is predicted to increase by 0.5%. To know the value after the increment, 215 has to be multiplied by (1 + 0.005) or 1.005.

In the equation P  =  215(1.005)t/3, the value of t/3 has to be equal to 1 for a 0.5% increase.

The population increases by 0.5 % every n month.

Initial Population = 215

Final Population:

=215+215*0.5/100

=215.1.074

=216.074

Substituting the value of, Initial and final Population

[tex]216.075=215*(1.005)^\frac{t}{3} \\\\(1.005)^\frac{t}{3} =\frac{216.075}{215}\\ \\(1.005)^\frac{t}{3}(1.005)^1\\\\\\frac{t}{3} =1[/tex]

t=3 years=>36 months.

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If the four players choose their numbers independently and uniformly at random from [0,1], then the expected value of the sum of the two middle numbers is 1/2, and the expected value of the sum of the two extreme numbers is 1/2. Therefore, in order to minimize the expected

One of the most straightforward methods for gathering information from the entire population is random sampling. Every member of the subset has an equal chance of being chosen as part of the sampling process when using random sampling. For instance, if an organization employs 300 people overall, a sample group of 30 workers will be chosen to participate in the survey. In this instance, the population is the entire workforce of the organization, and the sample is 30 employees. Since all of the employees who were picked to participate in the survey were chosen at random, every worker has an equal chance of getting chosen.

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Answer: Use cross product property

Step-by-step explanation:

I solved it out for you below! I hope it helps! If you need a better explanation maybe ask your teacher? :)