a store buys a jacket for$20.00 and then sells it for 80% more what is the selling price for the jacket
Answer:
16.00
Step-by-step explanation:
80% of 20.00 is 16.00
A pack of gum costs 75 cents. That is 3 cents less than three times what the pack cost 20 years ago. Which equation could be used to find the cost of the gum 20 years ago?
Answer:
the answer is actually 3x - 0.03 = 0.75
Step-by-step explanation:
The triangles are similar. The ratio of the lengths of their corresponding sides is 25:45, or 5:9. Find the ratio of their perimeters and the ratio of their areas.
4.The point (2, 8) is on the graph of f(x) = x3. What is the value of b if the point (0.5, 8) is on the graph of f(bx)?
for a research project, students are asked to study how often students at an online high school look at social media while doing schoolwork
A city has a population of 320,000 people. Suppose that each year the population grows by 3.5%. What will the population be after 12 years?
Use the calculator provided and round your answer to the nearest whole number.
Answer is 483,542
Compound Interest:
The formula for compound interest is [tex]A = p(1 + \frac{r}{n} )^{nt}[/tex]
where P is the principal balance
r is the interest rate
n is the number of times interest is compounded per time period.
t is the number of time periods.
(Given),
P = 320,000
n = 1
t = 12
r = 3.5% = 3.5 / 100 = 0.035
[tex]A = 320,000 (1 + 0.035)^{12}[/tex]
[tex]A = 320000(1.035)^{12}[/tex]
A = 483,541.970 (approx)
A = 483,542 (Rounded to the nearest whole number).
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Rewrite the square-root expression as an imaginary number: sqrt of -64
is it 8i?
Answer:
The square root of -64 is 8i
Step-by-step explanation:
Given the number -64
we have to find the square root of the above number i.e [tex]\sqrt{-64}[/tex]
As
[tex]\sqrt{-64}=\sqrt{-8\times 8}[/tex]
[tex]=\sqrt{-(8)^2}[/tex]
[tex]=\sqrt{(-1)(8)^2}[/tex]
[tex]=\sqrt{-1}\sqrt{8^2}=8i[/tex]
Hence, the square root of -64 is 8i
bob gets 3n+2=20 as the final row of his magic number puzzle table. what was his starting number?
Each month, Kaisorn deposits $50.00 onto her public transportation card. It costs her $2.50 per trip to ride the subway. Thom deposits $40.00 on his public transportation card. It costs him $2.00 per trip to ride the subway.
If x represents the number of trips and y represents the amount remaining in each account, which system of equations represents their transportation costs?
A 50 − 2.5x = y
40 − 2x = y
B 50 + 2.5x = y
40 + 2x = y
C 50 − 2.5y = x
40 − 2y = x
D50 + 2.5y = x
40 + 2y = x
Answer:
A. 50 − 2.5x = y
40 − 2x = y
Step-by-step explanation:
We know that x represents the number of trips and y represents the amount remaining in each account, then, let's think in an example; after the first trip x = 1, therefore, Kaisorn's account must decrease from $50 to $50 - $2.5 = $47.5 = y, and Thom's account must decrease from $40 to $40 - $2 = $38 = y. Replacing x = 1 in each case gives:
A
50 − 2.5(1) = y
47.5 = y
40 − 2(1) = y
38 = y
B
50 + 2.5(1) = y
52.5 = y
40 + 2(1) = y
42 = y
C
50 − 2.5y = (1)
y = (1 - 50)/(-2.5)
y = 19.6
40 − 2y = (1)
y = (1 - 40)/(-2)
y = 19.5
D
50 + 2.5y = (1)
y = (1 -50)/2.5
y = -19.6
40 + 2y = (1)
y = (1 - 40)/(2)
y = -19.5
As it can be seen, option A is the correct one.
PLZ HELP ME
What is 3^2/3 equal to?
3 square root of 9
2swuare root of 9
3 square root of 27
2 square root of 27
A rectangular solid has sides of 7 cm, 9 cm, and 11 cm. What is its surface area?
Answer:
Surface area is, 478 square centimeter
Step-by-step explanation:
Surface area (S)of rectangle is given by:
[tex]S = 2(lw+wh+hl)[/tex] .....[1]
where,
l is the length
w is the width
h is the height of the rectangle respectively.
As per the statement:
A rectangular solid has sides of 7 cm, 9 cm, and 11 cm
⇒ l = 7 cm , w = 9 cm and h = 11 cm
Substitute in [1] we have;
[tex]S = 2(7 \cdot 9+9 \cdot 11+11 \cdot 7)[/tex]
⇒[tex]S = 2(63+99+77) = 2 \cdot 239 = 478 cm^2[/tex]
Therefore, the surface area is, 478 square centimeter
Which of the following is the most accurate definition of a function
Point V lies between points U and W on .
If UW = 9x – 9, what is UW in units?
5 units
6 units
30 units
36 units
After analyzing each option and testing them in the equation UW = 9x - 9, none of the provided options (5 units, 6 units, 30 units, 36 units) result in a consistent solution for the length of UW in units. Without additional information or a correct option, it is impossible to determine the length of UW in units.
Explanation:The student's question asks us to find the length of segment UW in units given that the formula for its length is UW = 9x - 9. To ascertain the correct length, we need a value for 'x'. Since the options provided are measured in units and do not contain variables, we have to assume that 'x' represents a specific value that, when substituted into the equation, will yield one of the given numerical options for UW.
Going through the provided options, we can test each number to see which, when substituted into 'x', will make UW a whole number. Starting with the smallest '5 units' and '6 units', we quickly find that none of these values, when multiplied by 9 and then decreased by 9, will yield themselves as a result. Thus, they can be dismissed as possible lengths of UW.
Moving on to '30 units' and trying x = 30 in the equation UW = 9x - 9, we get UW = 9(30) - 9 = 270 - 9 = 261, which does not match. Lastly, checking x = 36 in the equation gives us UW = 9(36) - 9 = 324 - 9 = 315, which is also not an option. None of the provided options are valid when 'x' is placed into the equation UW = 9x - 9.
Therefore, without additional information or a correct choice in the options, we cannot determine the length of UW in units.
Daniel has $25 to spend at the fair. If the admission to the fair is $4 and the rides cost $1.50 each , what is thw greatest number of rides daniel can go in ?
Daniel can go on 14 rides at the fair.
Explanation:To find out the greatest number of rides Daniel can go on, we need to calculate the cost of admission and the cost of the rides. The admission to the fair is $4 and each ride costs $1.50. To determine the number of rides, we subtract the cost of the admission from the total amount Daniel has to spend and then divide that by the cost of each ride. So, Daniel can go on (25 - 4) / 1.50 = 14 rides. Therefore, the greatest number of rides Daniel can go on is 14.
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Stephen wants to buy yellow tangs and clown fish for his saltwater aquarium. He wants to spend no more than $77 on fish. At the store, yellow tangs cost $15 each and clown fish cost $11 each. Write and graph a linear inequality to find the number of yellow tangs x and the number of clown fish y that Stephen could purchase. Name a solution of your inequality that is not reasonable for the situation. Explain
Krispy Krunch cereal is 49% sugar. about how many ounces of sugar are in a 16 oz box of Krispy Krunch?
An escalator in a department store is to carry people a vertical distance of 90 feet between floors. How long is the escalator if it makes an angle of 30° with the ground? answer in feet ...?
The length of the escalator is approximately 180 feet.
Explanation:To find the length of the escalator, we can use trigonometry. The vertical distance traveled by the escalator is given as 90 feet and the angle it makes with the ground is 30°.
Using the sine function, we can determine the length of the escalator:
Length of escalator = Vertical distance traveled / sin(angle)
Therefore, the length of the escalator is:
Length of escalator = 90 feet / sin(30°)
Calculating the above expression, the length of the escalator is approximately 180 feet.
Final answer:
The length of the escalator is found using the cosine function for a 30° angle and a vertical height of 90 feet. The calculated length is approximately 77.94 feet.
Explanation:
The question asks how long an escalator is if it covers a vertical distance of 90 feet at a 30° angle with the ground. To find the length of the escalator, we can use trigonometric functions, specifically the cosine function, which relates the adjacent side (the length of the escalator) to the hypotenuse (the vertical height) in a right-angled triangle.
Using the formula:
cos(θ) = adjacent/hypotenuse
Where:
θ is the angle
'Adjacent' is the length of the escalator
'Hypotenuse' is the vertical height, which is 90 feet
To solve for the length (L) of the escalator:
cos(30°) = L / 90 feet
L = 90 feet * cos(30°)
L = 90 feet * (√3/2)
L = 45√3 feet
Or approximately L = 45 * 1.732 = 77.94 feet
Therefore, the length of the escalator is approximately 77.94 feet.
EASY QUESTION PLZ HELP
evaluate 10^-7
Final answer:
To evaluate 10⁻⁷, it is understood as 1 divided by 10 to the seventh power, or 0.0000001. This notation is used in scientific measurements, for instance in expressing the hydronium ion concentration based on pH.
Explanation:
To evaluate 10⁻⁷, we must understand the notation of negative exponents.
10 raised to the power of -7 can be written as 1 divided by 10 raised to the power of 7:
10⁻⁷ = 1 / 10⁷
Since 10 raised to any positive power results in a large number, 10 raised to the power of 7 is a very large number (10,000,000). Dividing 1 by this large number is very close to zero:
1 / 10⁷≈ 0.000 000 1
Therefore, 10⁻⁷ is approximately equal to 0.000 000 1. This value is incredibly small, representing one divided by ten million.
This type of notation is commonly used in scientific measurements, such as expressing the concentration of hydrogen ions in a solution with a certain pH level.
If f(x) is an even function, which statement about the graph of f(x) must be true?
-It has rotational symmetry about the origin.
-It has line symmetry about the line y = x.
-It has line symmetry about the y-axis.
-It has line symmetry about the x-axis.
Since f(x) is an even function, the statement which is true is the graph of f(x) has a line of symmetry about the y-axis.
To answer the question, we need to know what an even function is.
What is an even function?An even function is a function f(x) such that f(x) = f(-x). That is f(x) is single valued for both positive and negative values of x.
Now, for an even function, since f(x) = f(-x), both positive and negative values of x give a single value of f(x).
For this to be true, the graph of f(x) is symmetric about the y-axis.
So, since f(x) is an even function, the statement which must be true is graph of f(x) has a line of symmetry about the y-axis.
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Solve for x.
6(x – 1) = 9(x + 2)
To solve for x in the equation 6(x – 1) = 9(x + 2), expand and simplify the equation, combine like terms, isolate the variable x, and solve for x by dividing both sides by 3.
Explanation:To solve for x in the equation 6(x – 1) = 9(x + 2), we can begin by expanding the equation:
6x - 6 = 9x + 18
Next, we can combine like terms by subtracting 6x from both sides:
-6 = 3x + 18
Then, we can isolate the variable x by subtracting 18 from both sides:
-24 = 3x
Finally, we can solve for x by dividing both sides by 3:
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Summer day camp is about to begin. Today there are 132 boys signed up and 219 total children signed up. How many more boys than girls are signed up for camp?
The more boys than girls are signed up for camp are 22.
We have given that
Summer day camp is about to begin. Today there are 132 boys signed up and 219 total children signed up.
What is subtraction?Subtraction is an arithmetic operation that represents the operation of removing objects from a collection. Subtraction is signified by the minus sign
Therefore for the girl
219-132 is the equation because the rest of the 219 comes from the girls who signed up.
219-132= 77.
To find how many more boys than girls signed up you need to subtract 77 from 132.
132-77= 55
Therefore the more boys than girls are signed up for camp are 22.
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What is negative 8 over 12?
What might cause the disappearance of animals in the wild
Various factors cause the disappearance of animals in the wild, including habitat destruction, hunting, disease, and changes in predator-prey relationships.
Explanation:The disappearance of animals in the wild can be caused by various factors, including habitat destruction, hunting, disease, and changes in predator-prey relationships. One of the main factors is habitat destruction, which occurs when natural habitats are altered or destroyed by human activities such as farming, logging, and construction. This leads to a loss of biodiversity as plant and animal populations are destroyed or displaced.
Hunting is another major cause of animal disappearance. Animals are hunted for various purposes including meat, hides, and horns. Large mammals are particularly vulnerable as they are often targeted for their valuable resources. In addition, diseases can spread among animals due to human activities, such as the introduction of domestic animals, leading to population declines and even extinctions.
Changes in predator-prey relationships can also affect animal populations. For example, the decline of predators like cougars, lions, and leopards can result in an increase in the prey population. This can lead to changes in vegetation, stream paths, and overall biodiversity.
Let f(x) = x2 - 81. Find f-1(x).
Question 7 options:
1) ± √x+81
2) ± 9√x
3) 1 over x^2-81
4) x^2 over 81 ...?
The inverse function of f(x) = x^2 - 81 is found by swapping x and y in the original equation and solving for y, resulting in f^-1(x) = ±√(x + 81).
Explanation:To find the inverse function f-1(x) of the function f(x) = x2 - 81, we need to swap the roles of x and y in the original function and solve for y, which represents f-1(x). Here are the steps:
Start with the original function: y = x2 - 81.Rearrange to solve for x: x = y2 - 81.Swap x and y: y = x2 - 81 becomes x = y2 - 81.Add 81 to both sides: x + 81 = y2.Take the square root of both sides: y = ±√(x + 81).The correct answer is option 1, ±√(x + 81).
(cosx/(secx-tanx)) = 1+senx
i dont know how to prove this! HELP ...?
Two variables which have a constant ratio between them are said to be ___.
Answer:
Two variables which have a constant ratio between them are said to be proportional.
Step-by-step explanation:
We have been given an incomplete sentence. We are supposed to complete our given sentence.
We know that two quantities are proportional, when they share a common ratio between them.
Therefore, the missing word from our given sentence is 'proportional'.
"Calculate cos theta to two decimal places. (Use the pic attached inside!!!)
A. 0.61
B. 1.44
C. 0.72
D. 0.43
Shannon sells handmade wallets for $12 each.
Yesterday, she sold n wallets. Today, she sold 3 less wallets than yesterday.
Over the past two days, she earned a total of $396.
Drag and drop terms and an operation to create an equation that models the situation. Then, solve for n, the number of wallets Shannon sold yesterday.
15
12n + 3
+
396
396
3n
n - 3
n - 3
n + 3
12n
Mr. green is putting lights around 8 windows; each window is 1 and a half metres wide and 2 metres long. how many metres of lights does he need
To find the total length of lights needed, we find the perimeter of one window and multiply that by the number of windows. Mr. Green needs 56 meters of lights for all 8 windows.
Explanation:To solve the problem, we need to find the total length of lights Mr. Green needs for all the windows. First, we need to compute the perimeter for one window, which is two times the sum of the length and the width. Therefore, for one window, that would be 2×(1.5m + 2m) = 7m. Since there are 8 windows, Mr. Green would need a total of 8×7m = 56m of lights.
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What is 65 percent of 40?
First, let's write 65% as a decimal. We can do this by moving the decimal point 2 places to the left. When we do this, we will get 0.65.
Next, the word of means "multiply" so we have to multiply 0.65 by 40.
(.65) × (40) = 26.00
To calculate 65 percent of 40, convert 65% to a decimal (0.65) and then multiply by 40 to get the answer, which is 26.
To find what 65 percent of 40 is, you can convert the percentage to a decimal and then multiply by the number. To convert a percentage to a decimal, divide it by 100. In this case, 65% becomes 0.65.
Next, multiply 0.65 by 40 to get the answer.
The calculation process looks like this:
0.65 (converted percentage) × 40 (the number) = 26
Therefore, 65 percent of 40 is 26.