Stacy saved 30% on single item. If she saved the item before the discount?

Answer:

Step-by-step explanation:

Answer: 1/4

Add: 3/4 + 1/6 = 3 · 3 / 4 · 3 + 1 · 2 / 6 · 2 = 9/12 + 2/12 = 9 + 2/12 = 11/12

Subtract:  1 - 2/3 = 11/12 - 2/3 = 11/12 - 2 · 4 / 3 · 4 = 11/12 - 8/12 = 11 - 8/12 = 3/12 = 3 · 1 / 3 · 4 = 1/4

The intervals of concavity for f(x) = 3 cos x, with 0 < x < 21, are (0, π/2) and (3π/2, 2π).

To find the intervals of concavity for f(x) = 3 cos x, we need to analyze the second derivative of the function.

First, let's find the second derivative of f(x):

f'(x) = -3 sin x (derivative of cos x)

f''(x) = -3 cos x (derivative of -3 sin x)

Now, we can analyze the concavity of f(x) by considering the sign of the second derivative:

When x ∈ (0, π/2): In this interval, cos x > 0, so f''(x) < 0. The second derivative is negative, indicating concavity downwards.

When x ∈ (π/2, 3π/2): In this interval, cos x < 0, so f''(x) > 0. The second derivative is positive, indicating concavity upwards.

When x ∈ (3π/2, 2π): In this interval, cos x > 0, so f''(x) < 0. The second derivative is negative, indicating concavity downwards.

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Answer:

in the first equation f(2)=6 is f=3

In second place the answer of that equation is f=1/3

Answer:

7 and -6   (corresponding to Answer C)

Step-by-step explanation:

Solve x(x - 1) = 42 for x.  

To do this, first perform the indicated multiplication and then rearrange the terms in standard quadratic function order:

x^2 - x - 42 = 0

Factoring yields (x - 7)(x + 6) = 0,

leadng to roots 7 and -6   (corresponding to Answer C)

Answer:

\(y=2x-2\)

Step-by-step explanation:

Because the coordinates for x = 0 is (0,-2) so that's your y- intercept.

Then if you all you have to do is make sure that you have the correct slope.

So i just made a table on paper and started going up and seeing what slope i'd need to match the table on the screen.

\(2(0)-2=-2\\2(1)-2=0\\2(2)-2=2\\2(3)-2=4\)

The coordinates of B' are given as follows:

B'(12, -9).

A dilation is defined as a non-rigid transformation that multiplies the distances between every point in a polygon or even a function graph, called the center of dilation, by a constant factor called the scale factor.

The coordinates of B are given as follows:

B(4, -3).

The scale factor is given as follows:

k = 3.

Hence the coordinates of B' are given as follows:

B'(12, -9).

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The coordinates of B' include the following: D. (12, -9).

In Mathematics and Geometry, a dilation is a type of transformation which typically changes the dimensions (size) or side lengths of a geometric object, but not its shape.

This ultimately implies that, the dimensions (size) or side lengths of the dilated geometric object would increase or decrease depending on the scale factor applied.

In this scenario and exercise, we would have to dilate the coordinates of the pre-image (triangle ABC) by using a scale factor of 3 centered at the origin in order to determine B' as follows:

Coordinate B (4, -3)        →       (4 × 3, -3 × 3) = X' (12, -9).

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Answer:

WARNING! THE PERSON ABOVE ME IS WRONG.

The correct answer is 3. (C)

ED2021

Telling the managers in each of the 5 departments to randomly select 10 people to take the survey.

An unprejudiced portion of a population is chosen in a simple random sampling. With this sampling technique, the possibility of selection bias is reduced because every person of the population has an exact equal probability of being chosen.

A simple random sample is a group of people chosen at random, all with the same probability, from a larger group of people in statistics. It involves a method of randomly choosing a sample.

Random sampling assures that the results of sample should be close to those that would have been found if the complete population had been measured. With the simplest random sample, each unit in the population has an equal probability of being chosen.

Therefore, Option B is correct.

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Answer: the gcf is 2

Step-by-step explanation:

There boom your anwser

Answer:

Jasmine is correct.  The  triangles are similar.

Step-by-step explanation:

Triangle that have the same angle measurements are similar.

The sum of the interior angles of a triangle add up to 180

Triangle x has angles that measure 80 and 30.  That totals 110.  The third angle must be 70 so that it adds up to 180.

Triangle Y has angels that measure 80 and 70.  That adds up to 150, that means that its third angles must be 30

Both triangles have angle measurements to 80, 70, and 30 so they are similar.

Answer:

13m

Step-by-step explanation:

pls mrk me brainliest

The given statement is an example of "Principle of specificity or specific adaption to imposed demands (SAID Principle) ".

What is Principle of specificity ?

According to the specificity of training principle, each physical activity has a very unique physiological response. For instance, someone who jogs can anticipate that both their running performance and their level of aerobic fitness will be favorable.

if someone repeatedly lifts heavy weights, that person will produce higher levels of maximal strength.

This an example of  "Principle of specificity or specific adaption to imposed demands (SAID Principle) "

Tenet according to which the body will adjust to the unique demands imposed upon it.

Higher degrees of endurance can be attained by regularly lifting lesser weights for a large number of repetitions.

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The given statement is true because Time series models are statistical models that analyze and predict future values based on patterns and trends observed in historical data. Option A

The underlying assumption of time series analysis is that the future values of a variable can be predicted based on its past behavior. By examining the historical data, time series models identify patterns, trends, and seasonal variations that can help forecast future values.

There are various types of time series models, including autoregressive integrated moving average (ARIMA), exponential smoothing models, and seasonal decomposition of time series (STL). These models use different mathematical techniques to capture and analyze different aspects of the time series data.

The main goal of time series analysis is to make accurate predictions or forecasts of future values. By leveraging the patterns and trends observed in the historical data, these models provide insights into potential future outcomes.

Time series models are widely used in fields such as economics, finance, meteorology, stock market analysis, and demand forecasting, among others.

Option A

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Answer:

Its because of PEDMAS or PEMDAS (either or)

Step-by-step explanation:

in PEDMAS its Parentheses, exponents, division, multiplication, addition and then subtraction.

You do them by order, meaning that since parentheses is before exponents in PEDMAS its always just going to be before.

The forecast for May using a five-month moving average is 39 (Option E).

Moving average is used for smoothing out time series data to find any trends or cycles within the data. A five-month moving average is the average of the past five months. To calculate the moving average, add up the sales for the previous five months and divide it by five.

According to the question, the sales for the previous five months are: Nov. 39 Dec. 27 Jan. 40 Feb. 42 Mar. 41 April 47

We have to add the sales of these five months, which gives:

27 + 40 + 42 + 41 + 47 = 197

To find the moving average for May, we divide this sum by 5:

197 / 5 = 39.4

Since we have to round the answer to the nearest whole number, we round 39.4 to 39, which is option E.

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Answer:

its d

Step-by-step explanation: im taking the quiz right now and this is what i chose i am 100% sure that this is the answer! Hope this helps!

The waves move faster at higher temperatures and in a solid phase because there is more energy and the particles are closer together.

Energy is a quantifiable quality that may be imparted to a body or a physical system and is visible in the way things work as well as in the way that things radiate heat and light.

Higher temperatures imply more energy, and particles are close together in a solid phase.

As a result, highly energetic particles collide with nearby particles, which then collide with further particles.

Higher temperatures cause waves to move more quickly; in a solid phase, more energy is there but the particles are farther apart.

less energy is present but the particles are closer together; more energy is present but the particles are farther apart.

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Answer:

\(t(x) = 4x - 2 \\ c(x) = x + 9 \\ c(t(x)) = (4x - 2) + 9 \\ = (4(2) - 2) + 9 \\ = 8 - 2 + 9 \\ = 6 + 9 = 15\)

Answer: 108

Step-by-step explanation:

i just did it

According to the rate of change, it is found that the hourly rate of temperature change at the bottom of the mountain was of -2.5 ºC per hour.

The average rate of change of a function is given by the change in the output divided by the change in the input.

In this problem, it is stated that at the top of the mountain, the average rate of change is of -2.5 ºC per hour, and at the bottom of the mountain the rate is the same, hence the hourly rate of temperature change at the bottom of the mountain was of -2.5 ºC per hour.

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Answer:

6

Step-by-step explanation:

Pythagorean Theorem:

a^2 + b^2 = c^2

5^2 + b^2 = sqrt61^2

25 +b^2 = 61 (sqrt and ^2 cancel out)

-25 from both sides

b^2 = 36

sqrt from both sides

b= 6

Answer:

6 feet

Step-by-step explanation:

a^2+b^2=c^2

a^2+5^2=\(\sqrt{61\\}\)^2

a^2=61-25

a^2=\(\sqrt{36}\)

a=6

Let me know if u need further explanation!

Length οf the smaller οf the twο missing sides (the secοnd leg) is 80

In mathematics, the Pythagοrean theοrem οr Pythagοras' theοrem is a fundamental relatiοn in Euclidean geοmetry between the three sides οf a right triangle. It states that the area οf the square whοse side is the hypοtenuse (the side οppοsite the right angle) is equal tο the sum οf the areas οf the squares οn the οther twο sides.

Let x be the length οf the smaller οf the twο missing sides (the secοnd leg). Then the length οf the larger missing side (the hypοtenuse) is (x + 2), since the twο sides are cοnsecutive even integers.

By the Pythagοrean theοrem, we have:

\(18^2 + x^2 = (x + 2)^2\)

Simplifying and expanding the right side, we get:

\(324 + x^2 = x^2 + 4x + 4\)

Subtracting x^2 frοm bοth sides, we get:

324 = 4x + 4

Subtracting 4 frοm bοth sides, we get:

320 = 4x

Dividing bοth sides by 4, we get:

x = 80

Therefοre, the length οf the smaller οf the twο missing sides (the secοnd leg) is 80.

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Answer:

AB is shortest side

Step-by-step explanation:

According to given question circuit represented as,

From the images

\(cos 30^0=\frac{BC}{38} \\0.86=\frac{BC}{38} \\BC=32.68 cm\)

Now,

\(sin 30^0=\frac{AB}{38} \\0.5=\frac{AB}{38} \\AB=19 cm\)

Therefore, AB is shortest side

The probability that it runs on electrical power and has an alarm is 0.54.

In the collection of clocks at Dr. Zadok's Museum, 28% run on electrical power, 45% have alarms, and 54% either run on electrical power or have alarms.

The number of clocks that do not meet both requirements (i.e., those that do not operate on electrical power or do not have alarms) can be subtracted from the total number of clocks in order to get the number of clocks that do so:

The probability that it runs on electrical power and has an alarm is calculated as,

P = 54 / 100

P = 0.54

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Answer:

-4.515

Step-by-step explanation:

3.5 times 5.8 is 20.3 and then 3.5 times -7.09 is -24.815 added together to get -4.815 so technically its none of those but they might have miss typed so i think probably -4.515

Step-by-step explanation:

the opposite side is AC

The teacher has to select four members out of a math club of twelve members. There are 495 possible ways for her to make the selection.

To determine the number of ways the teacher can select four members from a math club of twelve, we can use the concept of combinations. A combination is a selection of items without regard to the order in which they are chosen. In this case, the teacher needs to select four members, and the order in which they are chosen does not matter.

The formula for calculating combinations is given by "n choose k," which is denoted as C(n, k) or nCk. In this case, the teacher needs to choose four members out of twelve, so the calculation would be 12C4.

Using the formula for combinations, 12C4 = 12! / (4!(12-4)!), where "!" represents the factorial function. Simplifying the expression gives us 12! / (4!8!).

The factorial function represents the product of all positive integers up to a given number. So, 12! is equal to 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1.

Simplifying further, we have 12! / (4!8!) = (12 × 11 × 10 × 9) / (4 × 3 × 2 × 1).

Calculating the expression gives us (11880) / (24) = 495.

Therefore, there are 495 possible ways for the teacher to make her selection of four members from the math club of twelve.

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Answer:

Didn't finish sorry. I wish I could help.

Answer:

x>2

Step-by-step explanation:

Answer:

Step-by-step explanation:

A fruit punch recipe uses 4 cups of orange juice for EVERY 1 cup of cranberry juice.

This means that if i wanted 2 cups of cranberry juice, i also need double the amount of orange juice, which would be 8 cups.

In this way we can say the ratio of orange juice to cranberry juice would be 4:1.

This is the same as saying for every 1 cup cranberry juice, we need 4 cups orange juice . This is written as 1:4

Answer:

485÷68=7.13=7

Step-by-step explanation:

fisrt you must divided 485÷68=7.13=7

A procedure used to compare more than two groups of scores, each of which is from an entirely separate group of people is called an analysis of variance.

The correct option is (A) analysis of variance (ANOVA).

ANOVA is a statistical method used to compare the means of two or more groups. It is a useful technique for analyzing data in experiments where multiple groups are being compared.

The purpose of ANOVA is to determine whether the means of the groups are significantly different from each other or not.

ANOVA works by comparing the variation between groups with the variation within groups. The ratio of these two variations is known as the F-ratio.

If the F-ratio is large enough, then it suggests that the variation between groups is significant and that the means are significantly different from each other.

ANOVA can be used in a wide variety of settings, including in clinical trials, psychology experiments, and business research. It is particularly useful in experimental designs where there are multiple treatment groups, such as in randomized controlled trials.

There are several types of ANOVA, including one-way ANOVA, two-way ANOVA, and repeated measures ANOVA. The choice of which ANOVA to use depends on the specific research question and design.

In conclusion, ANOVA is a powerful statistical method used to compare the means of two or more groups. It is a useful technique for analyzing data in a wide range of fields and can provide valuable insights into the differences between groups.

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