john is wallpapering a room and requires wallpaper. the wallpaper that he needs is charged at $12 per square meter, plus he must pay $20 for delivery. write down the cost function c(x), where x is the amount of wallpaper needed in square meters. if john has to pay a total cost of $500, how much wallpaper did he purchase?

Answer:

let angle GJK be x

GJK=GHK (Base angle of isosceles triangle)

Step-by-step explanation:

x=5x+8

5x-x=8

4x=8

x=8/4

x=2 ans.

Hence,

5x+8

5*2+8

10+8

18.ans

Answer: 7

Step-by-step explanation:

The common difference of the arithmetic sequence -6, 10, 26, 42 is given as follows:

16.

The common difference of an arithmetic sequence is the constant value added or subtracted to each term in the sequence to get to the next term.

The sequence for this problem is given as follows:

-6, 10, 26, 42, . . .

The difference between consecutive terms is given as follows:

42 - 26 = 16, which is constant for the other terms of the sequence.

Hence 16 is the common difference of the arithmetic sequence -6, 10, 26, 42, . . . given in this problem.

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Hence, the population proportion's 95% confidence interval is (0.210, 0.290), rounded to the thousandths place.

A mathematical concept known as proportionality describes the relationship between two quantities that have different sizes but keep the same ratio or proportion. In other words, to preserve the same ratio, if one item changes, the other quantity must also change in proportion. For instance, if an automobile's speed and distance are proportionate, doubling the distance it travels will cause the car to go twice as quickly while retaining the same speed-to-distance ratio. Equations or ratios in mathematics are frequently used to express proportionality.

given

We can use the following formula to determine the lower and upper bounds of the 95% confidence interval for the population proportion:

Lower limit: sqrt((p * q) / n) * p - z

Upper limit: sqrt((p * q) / n) = p + z

With q = 1 - p, z is the z-score corresponding to the level of confidence, and p is the sample proportion.

Here, p = 130/520 = 0.25, q = 1 - p = 0.75, n = 520, and the z-score is 1.96 at a 95% confidence level (from the standard normal distribution).

Lower limit: 0.210 (0.25" * 0.75") - 1.96 * sqrt(0.25" * 0.75")

The maximum is equal to 0.25 + 1.96 * sqrt((0.25 * 0.75) / 520) = 0.290.

Hence, the population proportion's 95% confidence interval is (0.210, 0.290), rounded to the thousandths place.

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The area of Mary's rectangular garden in her backyard is 40 1/8 square feet.

To determine the area of the rectangular garden, the length and width measurements must be multiplied, according to the question.A rectangular garden is one that has four corners, each of which forms a right angle. The width and length of a rectangular garden are typically stated in feet or meters.

The formula for finding the area of a rectangular garden is simply A = LW.  A represents the area, L represents the length of the garden, and W represents the width of the garden.The solution for this question will be derived using the formula A = LW, where the length is 7 1/2 feet, and the width is 5 3/4 feet.

A = LW  =  (7 1/2 feet) * (5 3/4 feet)  =  (15/2) * (23/4) = 345/8 ft^2  =  43 1/8 ft^2. Thus, the area of Mary's rectangular garden in her backyard is 40 1/8 square feet.

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2. Using percentage, we can find that Melissa needs to save $34500 in order to purchase the house.

3. The project was worth 97 points.

The denominator of a percentage (also known as a ratio or fraction) is always 100.

As a percentage, "%" is read as "percent" or "percentage" in this context.

You may always "divide by 100" this percent symbol to make it into a fraction or decimal equivalent.

Here we can see that Melissa has already $2500 in her savings account.

Total cost of house = $185000

Now for the loan she needs to have 20% of the mortgage as savings.

20% of $185000

20/100 × 185000

= 37000

Now she already has $2500.

So, the amount she need to save is= $37000 - $2500

= $34500

Now, total grade Brooke received = 87.

10 points have been taken off for her mistakes.

Total worth of test = 87+10 =97points.

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72, 2-ounce servings can be made to serve with buffalo wings.

Given that 6 bunches of celery each weighs 2 pounds. We have to find out how many 2-ounce servings can be made to serve with buffalo wings. Also, celery has a 75% yield.

[tex]Total weight of celery = 6 bunches * 2 pounds[/tex]

each = 12 pounds

Total weight of celery in ounces

  [tex]= 12 pounds * 16 ounces[/tex]

[tex]= 192 ounces[/tex]

75% yield of celery means that 75% of the celery is edible.

The edible portion of celery

    = 75% of 192 ounces  

   [tex]= (75/100)*192 = 144 ounces[/tex]

Now, as we have to find the number of 2-ounce servings that can be made, we need to divide the edible portion of celery by 2 ounces each. Thus, the number of 2-ounce servings can be made to serve with buffalo wings

  [tex]= 144/2 = 72.[/tex]

Hence, 72 2-ounce servings can be made to serve with buffalo wings.

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Answer:

1=26°

2=154°

3=26°

4=26°

5=154°

6=154°

7=26°

However, it is important to note that without additional information about the function and the windmill itself, further conclusions about its design and performance cannot be made.

Hi! I'd be happy to help you describe the windmill based on the provided graph.The graph of the function represents the relationship between the height (y) of the tip of a windmill blade and the angle of rotation (Θ) made by the blade. This function is periodic, indicating that the windmill blade follows a repetitive motion as it rotates.

The height of the blade tip varies sinusoidally with respect to the angle of rotation, suggesting that the windmill has a circular or rotational motion. The amplitude of the function gives the length of the windmill blade, while the period of the function represents a full rotation (360 degrees) of the windmill blade.

In summary, the windmill has a rotational motion, with the height of the blade tip following a sinusoidal pattern. The length of the windmill blade and the time it takes to complete a full rotation can be determined by analyzing the amplitude and period of the function.

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Answer:

3

8

Step-by-step explanation:

probability= no. of blue marbles

total no. of marbles

= 3

8

The linear equation in standard form is 19x - 14y = -182.

What is Linear equation?

A linear equation is a mathematical equation that describes a straight line on a graph. In other words, it is an equation that relates a variable or variables to a constant through a linear function, where the highest power of the variable is one. A general form of a linear equation is:

y = mx + b

To write the linear equation in standard form Ax + By = C, where A, B, and C are integers and A is positive, we need to get rid of the fraction in the equation.

To do this, we can multiply both sides of the equation by the denominator of the fraction, which is 14. This gives:

14y = 19x + 182

Next, we can rearrange this equation by subtracting 19x from both sides:

-19x + 14y = 182

Finally, we can multiply both sides of the equation by -1 to make the coefficient of x positive:

19x - 14y = -182

So, the linear equation in standard form is 19x - 14y = -182.

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The T-shirt takes 2.25 seconds to reach its maximum height and the maximum height is approximately 90.125 feet above the court.

The equation for the height of the T-shirt at time t is given as h(t) = -16t² + 72t + 5, where h(t) is the height in feet and t is the time in seconds.

To find the time it takes for the T-shirt to reach its maximum height, we need to find the vertex of the parabolic function. The vertex of a parabola in the form y = ax² + bx + c is given by (-b/2a, c - b²/4a). In this case, a = -16, b = 72, and c = 5. So, the time it takes for the T-shirt to reach its maximum height is:

t = -b/2a = -72/(2(-16)) = 2.25 seconds

To find the maximum height, we need to substitute the value of t we just found into the equation for h(t):

h(2.25) = -16(2.25)² + 72(2.25) + 5 ≈ 90.125 feet

Therefore, the T-shirt takes 2.25 seconds to reach its maximum height and the maximum height is approximately 90.125 feet above the court.

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According to the given information, the sale price is 160% of the purchase price and she would need to buy at least 4 jackets to make at least $250 in total sales.

What is the percentage?

The percentage is a way of expressing a fraction or proportion out of 100. It is commonly used in many different areas such as finance, math, science, and everyday life.

a. To find the percent of the purchase price that the sale price represents, we can use the formula:

percent = (sale price/purchase price) x 100

Plugging in the given values, we get:

percent = (96 / 60) x 100 = 160%

Therefore, the sale price is 160% of the purchase price.

b. If the owner increases the sale price by 160% when buying jackets for $45, then the new sale price for each jacket will be:

new sale price = 1.6 x $45 = $72

To find the number of jackets the owner must buy to make at least $250 in total sales, we can set up an equation:

number of jackets x $72 = $250

Solving for the number of jackets, we get:

number of jackets = $250 / $72 ≈ 3.47

Since the owner can only sell a whole number of jackets, she would need to buy at least 4 jackets to make at least $250 in total sales.

This is because selling 3 jackets would only bring in $216 in total sales, which is less than $250.

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The required day if yesterday is the day before yesterday of Saturday is Thursday and day after tomorrow is Sunday.

If yesterday was the day before yesterday of Saturday,

Yesterday was Saturday

Day before yesterday is Friday,

then yesterday was Thursday.

Now,

If yesterday was Thursday, then today is Friday.

Day representing tomorrow is Saturday.

And day after Saturday is definitely Sunday.

This implies,

The day after tomorrow would be Sunday.

Therefore, day after tomorrow is Sunday as per given situation.

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Answer:   [tex]2x^{2} +x-8[/tex]

Step-by-step explanation:

(f + g)(x)

= f(x) + g(x)

= [tex]x^{2} +x+1+(x^{2} -9)[/tex]

= [tex]x^{2} +x+1+x^{2}-9[/tex]

= [tex]2x^{2} +x-8[/tex]

We can calculate its product by taking the dot product of each row of B1A and each column of A1B. In this way, we can calculate B1A without knowing the values of A and B.

The matrix product of two matrices, A and B, is defined as the matrix C, where C = AB. To calculate the product of two matrices, we must take the dot product of each row of A and each column of B. If we are given a matrix product A1B, then we can calculate B1A without necessarily knowing what A and B are.

To do so, we must first invert the matrix A1B. We can do this by solving a system of equations. We can set up this system of equations by treating the entries of A1B as the coefficients in a system of equations, and solving for the entries of B1A. Once we have found the inverse, we can calculate the matrix B1A.

Finally, once we have the matrix B1A, we can calculate its product by taking the dot product of each row of B1A and each column of A1B. In this way, we can calculate B1A without knowing the values of A and B.

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Answer:

Step-by-step explanation:

The inequality statement that describes the two numbers on a number line "2 and a number 9 units to the left of 2" would be:

x < 2

where x represents the number that is 9 units to the left of 2.

Answer:

To find how many refrigerator magnets can be made with 9 3/8 inches of magnetic tape, we need to divide the total length of magnetic tape by the length of magnetic tape used for each magnet.

First, we need to convert the mixed number 9 3/8 to an improper fraction:

9 3/8 = (9 x 8 + 3)/8 = 75/8

Next, we divide 75/8 by 5/8 to find how many magnets can be made:

(75/8) ÷ (5/8) = (75/8) x (8/5) = 15

Therefore, 15 refrigerator magnets can be made with 9 3/8 inches of magnetic tape.

The scale factor of Hillary's photograph of her house is 1:8. This means that for every 1 inch of the house that is shown in the photograph, the house is actually 8 inches tall in real life.

To calculate the scale factor, you need to divide the actual height of the house by the height shown in the photograph. 28.5 feet divided by 3.6 inches gives a result of 8. In other words, for every 1 inch of the house that is shown in the photograph, the house is actually 8 inches tall in real life.

To explain further, the scale factor is a ratio that is used to compare two different measurements of the same object or shape. It tells us how much bigger or smaller one measurement is compared to another. In this case, we have compared the actual height of the house (28.5 feet) to the height of the house as shown in the photograph (3.6 inches). The ratio of the two measurements (1:8) tells us that the house is 8 times bigger in real life than it appears in the photograph.

The scale factor is an important concept in the field of mathematics and is often used in science, engineering, and architecture. It is used to measure the size and shape of objects, as well as to convert measurements from one unit of measure to another.

Therefore, the scale factor of Hillary's photograph of her house is 1:8, meaning that for every 1 inch of the house that is shown in the photograph, the house is actually 8 inches tall in real life.

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to enclose the circular garden, we need 163.64 meters of fencing. This means that if we were to wrap a measuring tape or any other material around the perimeter of the garden, it would need to be 163.64 meters long to cover the entire circumference of the circle.

To determine the amount of fencing required to enclose a circular garden with a radius of 26 meters, we need to calculate the circumference of the circle. The circumference is the distance around the perimeter of the circle, which can be calculated using the formula:

Circumference = 2 x π x radius

where π is the mathematical constant approximately equal to 3.14, and the radius is the distance from the center of the circle to any point on its perimeter.

So, in this case, the circumference of the circular garden can be calculated as follows:

Circumference = 2 x 3.14 x 26 m

= 163.64 m

Therefore, to enclose the circular garden, we need 163.64 meters of fencing. This means that if we were to wrap a measuring tape or any other material around the perimeter of the garden, it would need to be 163.64 meters long to cover the entire circumference of the circle.

It's worth noting that the formula for calculating the circumference of a circle can be used to find the amount of fencing required for any circular enclosure, such as a circular pond or a circular pool.

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Answer:

119% of 550

Step-by-step explanation:

add the percentages

To ensure that the dimensions of the fish tank are adequate, we need to ensure that the volume of the fish tank is greater than or equal to 2625. Since we do not have any information about the dimensions of the fish tank,

1. Let the dimensions of the fish tank be length, width, and height, represented by l, w, and h, respectively. V = l^1 × w^1 × h^1 = lwh. Therefore, the polynomial that represents the volume of the fish tank is V = lwh.

2. Then the volume of each hemisphere is (4/3)πr^3. Since there are two hemispheres, the total volume they take up is 2(4/3)πr^3 = (8/3)πr^3.

Therefore, the new volume of the fish tank after the hemispheres are installed is V - (8/3)πr^3, where V is the original volume of the fish tank. Substituting V = lwh, we get:

[tex]V_new = lwh - (8/3)πr^3[/tex]

3.The binomial that represents the length of the fish tank is l. To show that it is a factor of the polynomial V = lwh, we need to show that V is divisible by l, which means there exists a polynomial q such that V = lq. We can see that:

 [tex]V = lwh = l(wh) = l(q)[/tex], where q = wh.

Therefore, l is a factor of V.

4. To determine if the binomial l is a factor of the polynomial V_new = lwh - (8/3)πr^3, we need to check if V_new is divisible by l. We can use polynomial long division to divide V_new by l:

Let the dimensions of the fish tank be length, width, and height, represented by l, w, and h, respectively.

Then the volume of the fish tank is V = lwh. We can use the properties of exponents to simplify this expression by multiplying the powers of the variables: [tex]V = l^1 × w^1 × h^1 = lwh[/tex]  . Therefore, the polynomial that represents the volume of the fish tank is V = lwh.

The volume of each hemisphere is [tex](4/3)πr^3[/tex]  . Since there are two hemispheres, the total volume they take up is  [tex]2(4/3)πr^3 = (8/3)πr^3.[/tex]

Therefore, the new volume of the fish tank after the hemispheres are installed is V - (8/3)πr^3, where V is the original volume of the fish tank. Substituting V = lwh, we get:

V_new = l [tex]wh - (8/3)πr^3[/tex]

The binomial that represents the length of the fish tank is l. To show that it is a factor of the polynomial V = lwh, we need to show that V is divisible by l, which means there exists a polynomial q such that V = lq. We can see that:

V = lwh = l(wh) = l(q), where q = wh.

Therefore, l is a factor of V.

To determine if the binomial l is a factor of the polynomial V_new = lwh - (8/3)πr^3, we need to check if V_new is divisible by l. We can use polynomial long division to divide V_new by l:

Since there is a remainder of  [tex]- (8/3)πr^3[/tex] , we can see that l is not a factor of V_new.

5. The average amount of tank allotted for each fish is represented by the binomial  [tex](22 − 1)[/tex] . To determine if the dimensions of the new habitat are adequate for 125 fish, we need to check if the volume of the fish tank is greater than or equal to the space required for 125 fish.

Let the required space for each fish be v, then the total space required for   [tex]125[/tex] fish is [tex]125v[/tex] . Substituting the given binomial, we have:

[tex]v = (22 - 1) = 21[/tex]

Therefore, the total space required for 125 fish is [tex]125v = 125(21) = 2625[/tex] . We cannot determine if it is adequate for the given number of fish.

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The probability of drawing at least one spade when drawing two cards with replacement from a standard deck of cards is approximately 0.26%.

When drawing two cards at random with replacement from a standard 52-card deck, there are 4 possible outcomes for the first card being a spade and 4 possible outcomes for the second card being a spade.

However, there is also 1 possible outcome where both cards are spades, which would be counted twice if we add the outcomes for the first and second cards separately. Therefore, the total number of outcomes where at least one card is a spade is 4 + 4 - 1 = 7.

The total number of possible outcomes when drawing two cards with replacement is 52 x 52 = 2,704.

Therefore, the probability that at least one card is a spade when drawing two cards with replacement is:

P(at least one spade) = 7 / 2,704 ≈ 0.0026

So, the probability that at least one card is a spade is approximately 0.0026 or 0.26%.

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They represent a more focused sample of people the researcher is interested in examining in order to draw conclusions about the larger community of American men under 25.

The null hypothesis is a claim made in statistical hypothesis testing that presupposes there is no correlation between groups or any meaningful difference between a set of variables. It is commonly denoted by "H0," and the alternative hypothesis is compared with it ("H1"). The null hypothesis is typically assumed to be true, and in order to determine whether it can be rejected or not, it must be statistically tested. The alternative hypothesis is accepted if there is enough data to refute the null hypothesis. In contrast, the null hypothesis is maintained if there is not sufficient evidence to support it.

given

The group of 50 males who are chosen to take part in the study serves as the sample for the experiment.

They represent a more focused sample of people the researcher is interested in examining in order to draw conclusions about the larger community of American men under 25.

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Answer: The speed of light is approximately 89,100 times faster than the speed of sound.

Step-by-step explanation: To find out how many times faster the speed of light is than the speed of sound, we need to divide the speed of light by the speed of sound:

Speed of light / Speed of sound = (6.710610^7) / (7.5410^2)

Simplifying this calculation gives us:

Speed of light / Speed of sound = 8.91*10^4

This means that the speed of light is approximately 89,100 times faster than the speed of sound.

Hope this helps, and have a great day!

The bookshop will receive a total amount of Rs. 23,200 by selling all the books.

WHAT IS SELLING PRICE ?

The selling price is the price at which a product or service is sold to a customer. It is the amount of money that a seller charges to a buyer for a particular product or service. The selling price may include various factors such as the cost of production, overhead costs, profit margin, taxes, and other charges. It is an important concept in business and commerce, as it determines the revenue generated by a company and its profitability.

We can represent the given information using matrices as follows:

Let A be the matrix of the number of books in dozens, where each row represents a subject and each column represents the number of dozens of books:

A =

| 10 8 10 |

|____________|

Let B be the matrix of the selling prices of each book, where each row represents a subject and each column represents the selling price of each book:

B =

| 80 |

| 60 |

| 40 |

To calculate the total amount the bookshop will receive, we need to multiply the matrices A and B using matrix algebra:

C = A * B

C =

| 10 8 10 | | 80 | | 12000 |

| 60 | = | 7200 |

| 40 | | 4000 |

Therefore, the bookshop will receive a total amount of Rs. 23,200 by selling all the books.

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Answer:

C. A limited government protects individual freedoms.

Step-by-step explanation:

There are more individual freedoms as opposed to the lifestyle of those who are under a monarchy

Answer:

£21

Step-by-step explanation:

We know

kai and David share £84 in the ratio 1:3. Meaning for every £4, Kai receive £1 & David received £3.

Calculate the amount of money kai gets​?

To get from 4 to 84, we time 21.

We take

1 x 21 = £21

So, Kai gets £21

Answer:

16

Step-by-step explanation:

When we divide the entire equation by 1/-2 to get rid of the coefficient of n we get n = 16.