I need help pretty please :( :(​

Answer:

-0.5x^2 - 5x - 0.8

Step-by-step explanation:

The 2 zeroes of the function are at x = -8 and x = -2 so we can write the quadratic as

y = a(x + 2)(x + 8)   where a is a value to be found.

When x = -6, y = 4 so:

4 = a(-6+2)(-6 + 8)

4 = -8a

a = -0.5

The function is:

-0.5(x + 2)(x + 8)

= -0.5(x^2 + 10x + 16)

= -0.5x^2 - 5x - 0.8

In the given code, we are executing a nested for-loop with variables x, row and col as integers. After execution of this code we can find that x is printed twice.

Therefore, the answer is option (c) 2.

Here we are executing a for loop. In the first iteration, when row = 0, 'x' is printed as row < 2.

Now in the nested for loop, there is nothing to execute and it exit the loop when col = 3.

Now row is incremented and new value of row = 1, and row < 2. So statement inside the loop is executing printing 'x' for the second time and  then empty nested loop with variable col gets executed.

Again row gets incremented to row = 2, but row not less than 2, so we exit from the for loop. Therefore in total x is printed twice.

-- The question is incomplete, the complete question is as follows--

"How many letter x's will be output? Assume variables x, row, and col are integers. a. 6 b. 1 c. 2 d. 3

for(row = 0; row < 2; ++row){

System.out.print("x");

for(col = 0; col < 3; ++col){

// Do something

}}"

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Answer:

B and D

Step-by-step explanation:

\(1. \: 2x - 3 + 5 {x}^{2} = 0 \\ 2. \: 5 {x}^{2} + 5x - 3x - 3 = 0 \\ 3. \: 5x(x + 1) - 3(x + 1) = 0 \\ 4. \: (x + 1)(5x - 3) = 0 \\ 5. \: x = - 1 \: \: \: \frac{3}{5} \)

The average velocity for the [3,4] is 27m/s and for [4,5] is 37m/s

The average velocity can be found by taking the derivative of the position function and evaluating it at the midpoint of the interval.

The average velocity on the interval [3,4] is given by (s(4) - s(3)) / (4 - 3), which is equal to (s(4) - s(3)) / 1. Using the position function, s(t) = 5t^2 - 8t + 13, we find that s(4) = 5(4²) - 8(4) + 13 = 61 and s(3) = 5(3²) - 8(3) + 13 = 34. Therefore, the average velocity on the interval [3,4] is (61 - 34) / 1 = 27 m/s.

The average velocity on the interval [4,5] is given by (s(5) - s(4)) / (5 - 4), which is equal to (s(5) - s(4)) / 1. Using the position function, s(t) = 5t² - 8t + 13, we find that s(5) = 5(5²) - 8(5) + 13 = 98 and s(4) = 5(4²) - 8(4) + 13 = 61. Therefore, the average velocity on the interval [4,5] is (98 - 61) / 1 = 37 m/s.

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Answer:

Option (C)

Step-by-step explanation:

This question is incomplete; here is the complete question.

Morris is showing his work in simplifying,

(-6.7 + 4.3) - 1.2

Step 1: (4.3 - 6.7) - 1.2

Step 2: 4.3 - (6.7 + 1.2)

Step 3: 4.3 - 7.9

Step 4: -3.6

Which statement is true ?

A). Step 1, Morris used the commutative property.

B). Step 2, Morris used the distributive property.

C). Step 3, Morris used the associative property.

D). Step 4, Morris's answer is incorrect.

In associative property,

a + (b + c) = (a + b) + c

By this property,

(-6.7 + 4.3) - 1.2

Step 1, (-6.7 + 4.3) - 1.2 = (4.3 - 6.7) - 1.2

Step 2, (4.3 - 6.7) - 1.2 = 4.3 - (6.7 + 1.2) [Use of associative property]

Step 3, 4.3 - 7.9

Step 4, -3.6

The required area of the region bounded by the given graphs is 2 square units.

Given that area of the region bounded by the given graphs y= x-2 and

\(y^{2}\) = 2x - 4.

To find the area of the region bounded by the graph  y= x-2 and

\(y^{2}\) = 2x - 4 determine the points of intersection between two curves and solve the system of equation to find points.

Substitute y = x - 2 in the equation  \(y^{2}\) = 2x - 4 gives,

\((x-1)^{2}\) = 2x - 4.

On solving this quadratic equation gives,

x = 2 or x = 4.

Substitute these values of x in the equation y = x - 2, to find the corresponding values of y.

For x = 2, y = 2 - 2 = 0.

That implies, P1(2, 0)

For x = 4, y = 4 - 2 = 2.

That implies, P2(2, 2).

To find the area between the curves by using the following integral,

Area = \(\int\limits\)(y2 -y1) dx

Integrate above integral from x = 2 to x = 4 gives,

Area =  \(\int\limits^4_2\) (2x-4) - x-2 dx

On simplification gives,

Area =   \(\int\limits^4_2\) x- 2 dx

On integrating gives,

Area = \(x^{2}\)/2 - 2x \(|^{4} _2\)

Area = (\(4^{2}\)/2 -2×4) -  (\(2^{2}\)/2 - 2×2)

Area =  2 square units.

Hence, the required area of the region bounded by the given graphs is 2 square units.

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Answer:

If side BC is 2 units long, and <B = 50°, then

segment AB ≈ 3.11 units long.

Answer:

Slope

Step-by-step explanation:

I pretty sure it is slope because I did this question beginning of the year and I know this by heart it is slope

The box in feet with a length of 14" x 10' x 12" then volume of the box is 140.4 cubic feet.

What is unit rate?

A unit rate is a ratio in which the denominator is 1. It is a rate that compares a quantity to one unit of another quantity.

To calculate the volume of a box in feet, we need to convert all measurements to the same unit of measurement. Let's convert 14 inches to feet:

1 foot = 12 inches

14 inches = 14/12 feet

14 inches = 1.17 feet (approx.)

So the measurements of the box in feet are:

Length = 1.17 feet

Width = 10 feet

Height = 12 feet

To calculate the volume of the box, we need to multiply the length, width, and height:

Volume = Length x Width x Height

Volume = 1.17 feet x 10 feet x 12 feet

Volume = 140.4 cubic feet

Therefore, the volume of the box is 140.4 cubic feet.

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The upper specification limit is 2.520 mm, and the lower specification limit is 2.480 mm.  The process is not capable according to the purchaser's requirement of a capability index of 1.50.

(a) The upper specification limit (USL) is calculated by adding the process mean (2.500 mm) to the upper tolerance (0.020 mm), resulting in 2.520 mm. The lower specification limit (LSL) is calculated by subtracting the lower tolerance (0.020 mm) from the process mean, resulting in 2.480 mm.

(b) The process capability index (Cp) is calculated by dividing the tolerance width (USL - LSL) by six times the standard deviation. In this case, the tolerance width is 0.040 mm (2.520 mm - 2.480 mm) and the standard deviation is 0.004 mm. Therefore, Cp = 0.040 mm / (6 * 0.004 mm) = 1.25.

(c) The purchaser requires a capability index (Cpk) of 1.50, which measures how well the process meets the specification limits. Since Cp (1.25) is less than the desired Cpk (1.50), the process is not capable according to the purchaser's requirement. It is not good enough for the supplier either, as the Cp is less than the desired level.

(d) If the process mean were to drift to 2.497 mm, the Cp value would remain the same at 1.25. Since the Cp value is still less than the desired Cpk of 1.50, the process would still not be good enough for the supplier's needs, even with the changed process mean.

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a) To determine how many homes were included in the survey, we need to look at the total number of bars in the histogram. In this case, there are 10 bars representing different ranges of the number of televisions observed in a home. Each bar corresponds to a specific range or class. Counting the number of bars, we find that there are 10 bars in total.

b) To find out in how many homes five televisions were observed, we need to look at the bar that represents the class or range that includes the value 5. In this histogram, the bar that represents the range 4-6 includes the value 5. Therefore, in this survey, 5 televisions were observed in homes.

c) The modal class refers to the class or range with the highest frequency, or the tallest bar in the histogram. In this case, the bar that represents the range 1-3 has the highest frequency, which is 8. Therefore, the modal class is the range 1-3.

d) To determine how many televisions were observed in total, we need to sum up the frequencies of all the bars in the histogram. By adding up the frequencies of each bar, we find that a total of 28 televisions were observed in the survey.

e) To construct a frequency distribution from this histogram, we need to list the different classes or ranges and their corresponding frequencies.

- The range 0-1 has a frequency of 2.
- The range 1-3 has a frequency of 8.
- The range 4-6 has a frequency of 5.
- The range 7-9 has a frequency of 4.
- The range 10-12 has a frequency of 3.
- The range 13-15 has a frequency of 2.
- The range 16-18 has a frequency of 1.
- The range 19-21 has a frequency of 2.
- The range 22-24 has a frequency of 1.
- The range 25-27 has a frequency of 0.

By listing the different ranges and their frequencies, we have constructed a frequency distribution from the given histogram.

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True, conditional formulas can be used to exclude data from analysis if certain conditions are met. These formulas, often found in spreadsheet software and programming languages, allow you to set specific criteria that must be met in order for the data to be included or excluded from your analysis.

This can be useful in situations where you need to focus on specific subsets of data, or to remove outliers or irrelevant information from your dataset.

By incorporating conditional logic in your formulas, you can ensure that only relevant and useful data is included in your analysis, making it more accurate and efficient. Overall, the use of conditional formulas can greatly enhance your data analysis by providing a flexible and powerful tool to filter and process your data based on specific requirements.

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Answer:

\(f'(x)= \frac{13}{(2x+3)^2}\\\)

Step-by-step explanation:

\(f(x)= \frac{3x-2}{2x+3} \\\)

\(f'(x)=\frac{dy}{dx} = \frac{d}{dx}(\frac{3x-2}{2x+3})\\ f'(x)= \frac{(2x+3)\frac{d}{dx}(3x-2)-(3x-2)\frac{d}{dx}(2x+3) }{(2x+3)^{2} } \\f'(x)= \frac{(2x+3)(3)-(3x-2)(2)}{(2x+3)^{2} } \\\)

\(f'(x)= \frac{6x+9-6x+4}{(2x+3)^{2} }\\ f'(x)= \frac{13}{(2x+3)^2}\\\)

Answer:

y = 2327.49 ---> 25 hrs

starting plot points (0,640) and ending (25, 2327.49)

Step-by-step explanation:

b = 640

r = 5.3% = 0.053

t = 25

y = 640 ( 1 + 0.053)^25

y = 640 ( 1.053)^25

y = 2327.49 ---> 25 hrs

starting plot points (0,640) and ending (25, 2327.49)

The p-value is a statistical term that represents the probability of observing an outcome as extreme as or more extreme than the observed outcome, given that the null hypothesis is true. It is used to determine whether the null hypothesis should be rejected or accepted. If the p-value is less than the level of significance (alpha), the null hypothesis can be rejected, and the alternative hypothesis can be accepted.

Large p-values indicate that there is not enough evidence to reject the null hypothesis. A large p-value implies that the observed result is not significant, and the null hypothesis is supported.

The alpha level is a significance level that is set in advance of conducting a hypothesis test. It determines the level of evidence required to reject the null hypothesis. The alpha level is usually set at 0.05, meaning that the null hypothesis can be rejected if the p-value is less than 0.05.

A result is statistically significant if it is unlikely to have occurred by chance. In other words, if the p-value is less than or equal to the alpha level, the result is considered statistically significant, and the null hypothesis can be rejected.

A 95% confidence interval corresponds to a two-sided hypothesis test at an alpha level of 0.05. This means that the null hypothesis can be rejected if the observed outcome falls outside the confidence interval with a probability of 0.05 or less.

A 90% confidence interval corresponds to a one-sided hypothesis test at an alpha level of 0.1. This means that the null hypothesis can be rejected if the observed outcome falls outside the confidence interval with a probability of 0.1 or less.

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Answer:

A line with a positive slope that crosses the x-axis at a positive value

Step-by-step explanation:

it would be A because it would be going through quadrant 1 and 5 which has positive values as there divider

Answer:

59.0

Step-by-step explanation:

Given a right angled triangle, ∆XYZ, to know which trigonometric ratio formula to apply in finding the measure of angle X, note the following:

Opposite side to angle X = 6

Hypotenuse = 7

Therefore, we would apply the following trigonometric ratio formula to solve for m<X:

\( sin X = \frac{6}{7} \)

\( sin X = 0.8571 \)

\( X = sin^{-1}(0.8571) \)

\( X = 58.99 \)

\( m < X = 59.0 \) (rounded to nearest tenth)

Answer:

The next sequence is 243

The pattern is x 3

3 x 3 = 9

9 x 3 = 27

27 x 3 = 81

81 x 3 = 243

Step-by-step explanation:

You're welcome.

Answer: sin 2a + cos a

Step-by-step explanation:

Divide by 1

sin 2a\1 + cos a

The police should be concerned with only one crime scene, which is the location of the abduction.

The police should be immediately concerned with one crime scene, which is the location where the 12 year old girl was abducted from. A crime scene is a location where a crime has occurred or was suspected of having occurred. Investigators and law enforcement officials will gather and analyze physical evidence found at the scene of a crime to help determine what occurred, who was involved, and whether or not a crime has been committed. In this case, the location where the 12 year old girl was abducted from is the crime scene.

The police have done the investigation and identified the van used in the abduction, which was registered to Roger P. Anderson of 1594 Maple Drive. However, the location of the registered owner of the van is not considered a crime scene until evidence that links them to the crime scene is found. Thus, the police should be concerned with only one crime scene, which is the location of the abduction.

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Answer:

m = \(\frac{1}{5}\) , c = - 4

Step-by-step explanation:

m is the slope of the line and is calculated using the slope formula

m = \(\frac{y_{2}-y_{1} }{x_{2}-x_{1} }\)

with (x₁, y₁ ) = (- 4, 0) and (x₂, y₂ ) = (1, 1) ← 2 points on the line

m = \(\frac{1-0}{1-(-4)}\) = \(\frac{1}{1+4}\) = \(\frac{1}{5}\)

c is the value of the y- intercept , where the line crosses the y- axis

the line crosses the y- axis at - 4, then c = - 4

Answer:

52.8%

Step-by-step explanation:

To convert a decimal to a percent, you simply need to multiply the decimal by 100. This is because a percent is a fraction of 100. Therefore, since 0.528*100=52.8, the answer is 52.8%. Hope this helps!

Percentage form of number 0.528 is,

⇒ 52.8%

We have to given that;

To convert 0.528 into a percent.

Since, A number or ratio that can be expressed as a fraction of 100 or a relative value indicating hundredth part of any quantity is called percentage.

Hence, We can change into a percent as,

⇒ 0.528

⇒ 0.528 x 100%

⇒ 52.8%

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A graph of exponential function is an increasing or decreasing curve that does not have any specific polynomial or algebraic expression. To sketch the graphs of exponential functions f(x) = 4ˣ and g(x) = (1/4)ˣ by plotting points, we can substitute some x-values in these functions and determine the corresponding y-values. Then, we can plot these ordered pairs on a coordinate plane and connect the dots to obtain the graphs of the functions.Sketching the graph of f(x) = 4ˣ by plotting points:Let's consider some x-values such as -2, -1, 0, 1, and 2 and determine the corresponding y-values:f(-2) = 4⁻² = 1/16f(-1) = 4⁻¹ = 1/4f(0) = 4⁰ = 1f(1) = 4¹ = 4f(2) = 4² = 16Now, we can plot these ordered pairs on a coordinate plane and connect them with a curve as shown below. We can also extend the curve to the left and right sides of the y-axis to show the complete graph of f(x) = 4ˣ.graph{4^x [-10, 10, -5, 5]}Sketching the graph of g(x) = (1/4)ˣ by plotting points:Again, we can consider some x-values such as -2, -1, 0, 1, and 2 and determine the corresponding y-values:g(-2) = (1/4)⁻² = 16g(-1) = (1/4)⁻¹ = 4g(0) = (1/4)⁰ = 1g(1) = (1/4)¹ = 1/4g(2) = (1/4)² = 1/16Now, we can plot these ordered pairs on a coordinate plane and connect them with a curve as shown below. We can also extend the curve to the left and right sides of the y-axis to show the complete graph of g(x) = (1/4)ˣ.graph{(1/4)^x [-10, 10, -5, 5]}Conclusion:Thus, the graphs of the exponential functions f(x) = 4ˣ and g(x) = (1/4)ˣ by plotting points are obtained above. We plotted ordered pairs by substituting some x-values and determining the corresponding y-values. Then, we plotted these ordered pairs on a coordinate plane and connected them with curves to obtain the graphs of the functions.

The graph of the functions (a) f(x) = 4ˣ and b) g(x)= (1/4)ˣ is added as an attachment

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

(a) f(x) = 4ˣ b) g(x)= (1/4)ˣ

The above functions are exponential function that have the following features:

(a) f(x) = 4ˣ

(b) g(x)= (1/4)ˣ

Next, we plot the graph using a graphing tool by taking not of the above transformations rules

The graph of the functions is added as an attachment

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Answer:

-88

Step-by-step explanation:

8 x -11 = 88

Answer:

1.5808

Step-by-step explanation:

rounded

hundreds

1.58

tens

1.6

first

2

The given statement exists true. A matrix is broken down into orthogonal (Q) and upper triangular (R) matrices in a process known as QR decomposition (factorization).

A matrix can be expressed as the union of two distinct matrices, Q and R, using the QR matrix decomposition. R is a square upper/right triangular matrix and Q is an orthogonal matrix. R is also invertible because it is square and doesn't have zeros in its diagonal entries.

A matrix is broken down into orthogonal (Q) and upper triangular (R) matrices in a process known as QR decomposition (factorization). Finding eigenvalues and solving linear least squares problems both use QR factorization.

A = QR. Be aware that the QR-factorization of a rectangular matrix A is sometimes understood with Q square and R rectangular rather than Q rectangular and R square, as with the MATLAB command qr.

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The statement the slope of the simple linear regression model represents the average change in the value of the dependent variable (y) per unit change in the independent variable (x) is true because the slope represents the rate of change between the variables.

The slope in a simple linear regression model represents the change in the dependent variable (y) corresponding to a one-unit change in the independent variable (x). It measures the average rate of change between the variables. By calculating the slope coefficient, we can determine the average increase or decrease in the value of y for each unit increase in x.

For example, if the slope coefficient is 2, it means that, on average, for every one-unit increase in x, the value of y increases by 2 units. Similarly, if the slope coefficient is -1, it means that, on average, for every one-unit increase in x, the value of y decreases by 1 unit.

Therefore, the slope of the simple linear regression model quantifies the average change in the value of the dependent variable (y) for each unit change in the independent variable (x).

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