the bookstore would like marcus to pick up a weekly workload of 18 hours. Does this value for b lie in the solution set of the system of inequalities? explain.

Answer:

the two numbers are 3 and -4

Step-by-step explanation:

Product:  xy = -12, or x = -12/y

Sum:  x + y = -1, or -12/y + y = -1

Let's multiply all three terms by y to eliminate the fractional terms:

-12 + y^2 = -y, or

y^2 + y - 12 = 0

This factors into (y + 4)(y - 3) = 0, yielding y = -4 and y = 3.

Earlier we found that x = -12/y.  Here, if we choose y = -4, x = -12/(-4) = 3

and so the two numbers are 3 and -4.  Note that 3(-4) = -12, as required, and that 3 - 4 = -1, also as required.

Answer:

line segment rigthjjlkkk

The percent markup for the cost of shirt = 50%

Let us assume that the cost of each shirt be x dollars

A department store buys 300 shirts at a cost of $1,800.

Using unitary method the price of each shirt would be,

x = 1800/300

x = 6 dollars

A department store sells 300 shirts for $9 each.

So, Selling price of one shirt = $9

Price markup = Selling price - Cost price

                      = $9 - $6

                      = $3

The percent markup would be,

p = (Price markup / cost price) × 100

p = (3/6) × 100

p = 50%

Therefore, the percent markup = 50%

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Answer:

1. 3x = 12 . the answer is d. x = 4

Answer:

\(percentage = \frac{56}{145} \times 100\)

56/145×100

0.386...×100

38.6%

On solving we got that. he shorter pieces will therefore be 3 feet long and the longer pieces will therefore be 8 feet long.

Since equations are essentially questions, efforts to systematically find answers to those questions have been the driving force behind the development of mathematics. From straightforward algebraic equations that just require addition or multiplication to differential equations, exponential equations that use exponential expressions, and integral equations, there are many different types of equations that range in complexity.

The lengths of the shorter and longer pieces of a board should be determined.

the case

Let's say that the shorter parts are x in length.

as stated

Jared has an 11-foot wooden board with him.

In order for the longer piece to be 4 feet less than 4 times as long as the shorter piece, he wants to cut it into two pieces.

The length of the longer pieces is then equal to 4x - 4.

The equation then becomes

\(x + 4x - 4 = 11\\ 5x = 11 + 4\\ 5x = 15\\ x = 3 ft\)

The shorter pieces will therefore be 3 feet long.

The longer pieces' length -

\(4x - 4\\ = 4 X 3 - 4\\ = 12 - 4\\ = 8 ft\)

The longer pieces will therefore be 8 feet long.

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Answer:

2:5 is less than 7:15

Step-by-step explanation:

7:15 = 7/15 = .47 = .5

the other given ratios are,

9:15 = 3:5 = 3/5 = .6

2:5 = 2/5 = .4

3:5 =3/5 = .6

24:45 = 8:15 = 8/15 = .5

thus, the ratio which is less than 7:15 is 2:5

The correct symbol used for a column alias containing spaces is C. " " (quotation marks).

In SQL, when we want to assign a column alias containing spaces, we enclose the alias within double quotation marks. This is done to differentiate the alias from other SQL keywords or to handle cases where the alias includes special characters, spaces, or is case-sensitive.

For example, consider the following SQL query:

SELECT column_name AS "Column Alias"

FROM table_name;

In this query, we are selecting a column named "column_name" from the table "table_name" and assigning it the alias "Column Alias" containing spaces. By enclosing the alias within double quotation marks, we indicate to the database that it should treat the entire string as a single identifier or alias.

Using other symbols such as '', ||, or // will not achieve the desired result of creating an alias with spaces. These symbols have different meanings in SQL.

'' (two single quotation marks) typically represents an empty string or a string literal in SQL.

|| (double vertical bars) is the concatenation operator in some SQL dialects, used to combine strings or values.

// (double forward slashes) is commonly used for comments in various programming languages and does not have any special meaning for column aliases in SQL.

Therefore, the correct symbol to use for a column alias containing spaces is C. " " (quotation marks).

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By using the power property, the resultant answer when we rewrite log3x9 is (B) 9log3x.

Multiply the exponents to determine the power of the power.

This is a development of the powers property.

Consider raising a number to a power and repeatedly multiplying the entire phrase by itself.

According to the power of a powerful formula, you can multiply two exponents together if one is increased to a power.

How many times to multiply two numbers together is indicated by an exponent.

For instance, 42 instructs you to multiply by 4 and 4. Alternatively, multiply four by two.

So, we have: log3x9

We have the following for logarithm properties:

loga (x ^ b) = b * loga (x)

As a result of this property, in this instance, we have:

log3 (x ^ 9) = 9log3 (x)

Therefore, by using the power property, the resultant answer when we rewrite log3x9 is (B) 9log3x.

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Correct question:
Use the power property to rewrite log3x9.

A) 3log9x

B) 9log3x

C) 3logx

D) 2 + log3x

The 3 quartiles of the data are :

Q1 = 10

Q2 = 13

Q3 = 15

Range = 12

IQR = 5

To find the quartiles of the data, we need to sort the weights in ascending order:

8, 8, 9, 10, 10, 11, 12, 12, 13, 14, 14, 14, 15, 15, 16, 17, 18, 18, 18, 20

There are different methods for computing quartiles, but one common way is to use the median. The median is the middle value when the data are sorted in ascending order.

In this case, there are 20 weights, so the median is the average of the 10th and 11th values, which are both 14. Therefore, Q2 (the median) is 14.

To find Q1 (the first quartile), we need to find the median of the lower half of the data. The lower half consists of the first 10 values in the sorted list: 8, 8, 9, 10, 10, 11, 12, 12, 13, and 14.

There are 10 values in the lower half, so the median is the average of the 5th and 6th values, which are both 10. Therefore, Q1 is 10.

To find Q3 (the third quartile), we need to find the median of the upper half of the data. The upper half consists of the last 10 values in the sorted list: 14, 14, 14, 15, 15, 16, 17, 18, 18, and 20.

There are 10 values in the upper half, so the median is the average of the 5th and 6th values, which are both 15. Therefore, Q3 is 15.

The range is the difference between the largest and smallest values in the data set, which is 20 - 8 = 12.

The IQR (interquartile range) is the range of the middle 50% of the data. It is calculated as the difference between Q3 and Q1, which is 15 - 10 = 5.

The IQR gives a measure of the spread of the data, and is less affected by outliers than the range or standard deviation.

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9514 1404 393

Answer:

  5x -2y = 30

Step-by-step explanation:

The slope of the line ...

  Ax +By = C

is -A/B. This means we can use A=5 and B=-2 in the equation we're looking for. The value of C will be one that makes the equation true at the given point.

  5x -2y = 5(4) -2(-5)

  5x -2y = 30

The length of the model car based on the information is 0.8 feet.

It should be noted that scale simply shows the relationship between a measurement on a model as well as the corresponding measurement on the actual object.

From the information, the model car is constructed with a scale of 1:15.

When the actual car is 12 feet long, the length of the model will be illustrated as x. This will be:

= 1/15 = x / 12

Cross multiply

15x = 1 × 12

15x = 12

Divide

x = 12 / 15

x = 0.8

The length is 0.8 feet.

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The angles and length of the right triangle are as follows:

WX = 10√141 units

m∠X  = 30°

m∠V = 60°

A right angle triangle is a triangle that has one of its angles as 90 degrees. The sum of angles in a right angle triangle is 180 degrees.

Trigonometric ratios can be used to find the side and angles of the right triangle as follows;

Therefore,

Using Pythagoras's theorem,

WX² = (20√47)² - (10√47)²

WX² = 400(47) - 100(47)

WX² = 18800 - 4700

WX = √14100

WX = 10√141

Let's find the angles

sin m∠X  = opposite / hypotenuse

sin m∠X  = 10√47 / 20√47

sin m∠X  = 1 / 2

m∠X  = sin⁻¹ 0.5

m∠X  = 30 degrees

Therefore,

m∠V = 180 - 90 - 30

m∠V = 60 degrees

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Answer:

A

Step-by-step explanation:

i think its a because its saying which one does not allow you to conclude that both triangles are congruent but the other ones are talking the sides and a is the only one thats talking about the angles. so i dont really know if its right but thats just an educated guess.

Answer:

a) Pop

b) 30

c) 230

Step-by-step explanation:

Answer:

(c) Equilateral                                                                                                   Step-by-step explanation:

Answer:

y=3x+4

Step-by-step explanation:

The formula for point slope form is

y=mx+b

m is the slope and b is the y intercept, therefore we get the answer:

y=3x+4

The rate at which the top of the ladder is slipping down at the instant when the bottom of the ladder is 15 feet from the base of the building is -75/8 feet per second

The length of the ladder = 17

Consider the length of the base as x and the height is h

The rate at which the ladder is sliding = 5 feet per second

dx/dt = 5

Apply the Pythagorean theorem

x^2 + h^2 = 17^2

h^2 = 289 - x^2

h = \(\sqrt{289-x^2}\)

The rate of change of height with respect to x is

dh/dx = - x / (289 - x^2)^(1/2)

dh/dt = dh/dx × dx/dt

Substitute the values in the equation

= - 15 / (289 - 15^2)^(1/2) × 5

= -15/8 × 5

= -75/8 feet per second

Therefore, the rate of change of height when x = 15 is -75/8 feet per second

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The standard deviation of the weight distribution is approximately 20.31 pounds.

Let's denote the mean of the distribution as μ (mu) and the standard deviation as σ (sigma).

From the given information, we can calculate the z-scores corresponding to the weights of 154 pounds and 213 pounds.

For the weight of 154 pounds:

The proportion of players weighing less than 154 pounds is 10%, which corresponds to a cumulative probability of 0.10. To find the z-score, we can use a standard normal distribution table or a calculator:

z = invNorm(0.10) ≈ -1.28

For the weight of 213 pounds:

The proportion of players weighing more than 213 pounds is 5%, which corresponds to a cumulative probability of 0.95 (1 - 0.05). To find the z-score, we can again use a standard normal distribution table or a calculator:

z = invNorm(0.95) ≈ 1.64

In a standard normal distribution, the z-scores represent the number of standard deviations away from the mean.

Now, we can set up two equations using the z-scores:

1.28 = (154 - μ) / σ --> (1)

-1.64 = (213 - μ) / σ --> (2)

Solving these equations simultaneously will give us the mean (μ) and the standard deviation (σ) of the weight distribution.

Let's solve these equations:

From equation (1):

1.28σ = 154 - μ

From equation (2):

-1.64σ = 213 - μ

Adding equation (1) and equation (2):

1.28σ - 1.64σ = 154 - μ + 213 - μ

-0.36σ = 367 - 2μ

Simplifying:

-0.36σ = 367 - 2μ

0.36σ = 2μ - 367

Dividing by 0.36:

σ = (2μ - 367) / 0.36

Substituting this value of σ in equation (1):

1.28σ = 154 - μ

1.28[(2μ - 367) / 0.36] = 154 - μ

Simplifying:

1.28(2μ - 367) = 0.36(154 - μ)

2.56μ - 470.16 = 55.44 - 0.36μ

Combining like terms:

2.56μ + 0.36μ = 470.16 + 55.44

2.92μ = 525.6

Dividing by 2.92:

μ = 525.6 / 2.92

μ ≈ 180.00

Now that we have the value of μ, we can substitute it into equation (1) to find σ:

1.28σ = 154 - μ

1.28σ = 154 - 180

1.28σ = -26

Dividing by 1.28:

σ = -26 / 1.28

σ ≈ -20.31

Since standard deviation cannot be negative, we can disregard the negative sign. The standard deviation of the weight distribution is approximately 20.31 pounds.

To summarize:

Mean (μ) ≈ 180 pounds

Standard Deviation (σ) ≈ 20.31 pounds

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A rule that makes a particular cell is highlighted in yellow only if the value it contains is less than $5000 is an example of conditional formatting.

This is a special feature that can be found in programs such as excel and allows users to automatically apply specific changes or formatting to cells that meet specific criteria.

There are four main types:

In the case of the formatting described, this can be classified as conditional formatting because all cells that meet the criteria (less than $5000) will be automatically highlighted in yellow. Moreover, the type of formatting is a change in the color of the cell.

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Answer:

15.2 , 21.5 , 27.9 , 29.5

Step-by-step explanation:

please give brainliest and help me on my recent

Answer:

chatGPT

Step-by-step explanation:

Let's denote the speed of each car as v, and the distance that Car A travels as d. Then we can set up two equations based on the information given:

d = v * (12/60) (since Car A reaches its destination in 12 minutes)

d + 4 = v * (18/60) (since Car B travels 4 miles farther than Car A and reaches its destination in 18 minutes)

Simplifying the equations by multiplying both sides by 60 (to convert the minutes to hours) and canceling out v, we get:

12v = 60d

18v = 60d + 240

Subtracting the first equation from the second, we get:

6v = 240

Therefore:

v = 240/6 = 40

So the cars travel at a speed of 40 miles per hour.

Answer:

22%

Step-by-step explanation:

The decimal positional number system is the one that is most frequently used.

The consistent representation of numbers using digits and other symbols is known as a number system.

Some key features of number system are-

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At the end of 2018, the world population was approximately 7.53 billion people. This figure is calculated by taking the total population at the end of 2017, 7.4 billion people, and multiplying it by the population growth rate of 1.07%..

This means that the world population increased by approximately 130 million people in 2018. This population growth rate is consistent with the average growth rate of the world population over the last decade. While the population growth rate has been decreasing over the past few decades, it is still relatively high at 1.07%.

The high population growth rate is primarily due to high fertility rates in developing countries and a longer life expectancy in developed countries. This means that more people are born and fewer people die each year. As a result, the total population of the world increases each year.

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this is your answer hope it's helpful for you

The value of r'(1) is 125

The chain rule is a formula used to compute the derivative of a composite function. A composite function is a function that is formed by taking the output of one function and using it as the input of another function.

To find the derivative of r(x), we can use the chain rule:

r'(x) = f'(g(h(x))) × g'(h(x)) × h'(x)

Then, to find r'(1), we can evaluate this expression at x = 1:

r'(1) = f'(g(h(1))) × g'(h(1)) × h'(1)

We are given that h(1) = 3, g(3) = 5, h'(1) = 5, g'(3) = 5, and f '(5) = 5. Therefore, we can substitute these values into the expression for r'(1):

r'(1) = f'(g(h(1))) × g'(h(1)) × h'(1)

= f'(g(3)) × g'(3) × 5 (since h(1) = 3 and h'(1) = 5)

= f'(5) × 5 × 5 (since g(3) = 5 and g'(3) = 5)

= 5 × 5 × 5 (since f'(5) = 5)

= 125

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