Lisa works 6 hours at $13.75 per hour. How much does she earn?

Answer:

it is c

Step-by-step explanation:

Answer:

A.−3x^4+2x^2−4x

B.4p^7−10p^5+2p^4

Step-by-step explanation:

A.x(−3x^3+2x−4) then simplify −3x^4+2x^2−4x

B.  -2p^3(-2p^4+5p^2-p) then simplify 4p^7−10p^5+2p^4

Answer:

Step-by-step explanation:

first i would combine like terms so 1/4a + 1/3a is equal to 7/12 then the equation would be 7/12a+8=22 simplify the isolate the variable so i think it A=24

Answer:

Hey there!

Step-by-step explanation:

Equation: 1/4a + 1/a + 8 = 22

(The answer is 24)

(You have to do 3 steps in order to solve this question! The steps are below!)

~1. First you have to simplify both sides of the equation.

=> (1/4a + 1/3a) + (8) = 22

=> 7/12a + 8 = 22

~2. Next, subtract 8 from both of the sides.

After you do that you will get, 14

7/12a=14

~3. Lastly, you just multiply both sides by 12/7.

(12/7) x (7/12a)

(12/7) x (14)

~Therefore, A would equal to 24.

A=24

~Hope this helps!

~Good luck! :)

~If you still don’t understand, ask for help! (I would be glad to answer any questions you have! :D )

Using the Work time problem solving technic, Betty and Bullwinkle to mow the entire lawn in 30 minutes if they are working together.

As we know that if A is complete the work of z in x days and B is complete the same work (z) in y days then both of can do complete work together then Equation of both A and B are completing work (z) together in

( 1/x + 1/y = 1/z ) days

Since Betty can mow a lawn is 120 minutes, then

Betty's mowing rate is 1/120th of a lanw per minute.

Since Bullwinkle can mow a lawn is 40 minutes, then Bullwinkle mowing rate is 1/40th of a lawn per minute.

Suppose working together they can a lawn in x minutes.

both together they can mow a lawn is x minutes, then their combined mowing rate is 1/x th of a lawn per minute.

To get the equation,

the sum of their mowing rates must equal their combined mowing rate,

1/40 + 1/120 = 1/x

Solve that by multiplying through by LCD of 40 and 120 is 120 then 4x = 120 => x = 30

Hence, when both are working together they complete the work together in 30 minutes .

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Answer:

The relation is not a function

The domain is {1, 2, 3}

The range is {3, 4, 5}

Step-by-step explanation:

A relation of a set of ordered pairs x and y is a function if

Examples:

Let us solve the question

∵ The relation = {(1, 3), (2, 3), (3, 4), (2, 5)}

∵ x = 1 has y = 3

∵ x = 2 has y = 3

∵ x = 3 has y = 4

∵ x = 2 has y = 5

→ One x appears twice in the ordered pairs

∵ x = 2 has y = 3 and 5

∴ The relation is not a function because one x has two values of y

∵ The domain is the set of values of x

∴ The domain = {1, 2, 3}

∵ The range is the set of values of y

∴ The range = {3, 4, 5}

Using the formula of Confidence interval, a 90% one-sided upper confidence interval for mean SBP is 121.873.

Standard Deviation(s) = 9.9 mm HG

Sample Size(n) = 14

Sample Mean(m) = 118.3 mm HG

We have to construct a 90% one-sided upper confidence interval for mean SBP.

α = 1 - 90%

α = 1 - 0.90

α = 0.1

df = n - 1

df = 14 - 1

df = 13

One sided 90% upper confidence interval is given by

CI = m + tₐ × s/√n

CI = 118.3 + 1.3502 × 9.9/√14

CI = 118.3 + 1.3502 × 9.9/3.742

CI = 118.3 + 1.3502 × 2.646

CI = 118.3 + 3.573

CI = 121.873

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Answer:

B. \( 11^2 \)

Step-by-step explanation:

\( \frac{ {11}^{6} }{ {11}^{4} } = {11}^{6 - 4} = {11}^{2} \\ \)

The simplified form of the given expression is \(\frac{11^{6} }{11^4}\) will be \(11^2\).

The exponents of a number are defined as the representation of a number that shows how many times a number is multiplied by itself.

The given expression is

\(\frac{11^{6} }{11^4}\)

Therefore, the exponent will subtract,

= \(11 ^{6-4}\)

= \(11^2\)

Thus, the simplified form will be \(11^2\).

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Answer:

10. BE = 9

Step-by-step explanation:

The actual width of the building is 24 meters.

To calculate the actual width of the building in meters, we need to use the scale of 1:800.

The scale ratio indicates that 1 unit on the drawing represents 800 units in reality. In this case, the width of the office is given as 30mm on the drawing.

To find the actual width in meters, we can use the following calculation:

Actual width = (Width on drawing) × (Scale ratio)

Given that the width on the drawing is 30mm and the scale ratio is 1:800, we can substitute these values into the equation:

Actual width = 30mm × 800

Now, we can calculate the actual width:

Actual width = 24,000mm

To convert this to meters, we divide by 1000 since there are 1000 millimeters in a meter:

Actual width = 24,000mm ÷ 1000 = 24 meters

Therefore, the actual width of the building is 24 meters.

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The following is an excerpt from A First Training in Probability by Sheldon Ross. (74) = 35 is the right response.

Total moves required are 7, as follows:

Three steps up as well as four steps right.

Remember that perhaps the number of paths equals the number of arranged 7-tuples with 3 U's and 4 R's. As instance, the word URRURRU indicates to travel up, right, up, right, right, up.

There are 7 ways to arrange these letters, 7 ways to arrange the corresponding Us, and 7 ways to arrange the comparable Rs, for a total of 7!3!4! (74).

For each NxN grid, we may write the following as a generalization of our formula: It should be noted that there's a simpler method of writing this: D = N! / (K! * (N-K))! additionally known as the binomial coefficient.

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Answer:

The answer is D the second quadrant.

Step-by-step explanation:

HAVE A GREAT DAY!!!!!

The formula that can be used to describe the sequence is:\(a(n) = (-1)^(n+1) * 3^(n) * 4.\)

The given sequence is -81, 108, -144, 192.

The formula that can be used to describe the sequence is:  \(a(n) = (-1)^(n+1) * 3^(n) * 4\), where n is the nth term in the sequence.

This formula is a geometric sequence formula that can be used to describe the given sequence.

The formula represents the nth term of the sequence as a function of the position of the term in the sequence.

Here, n represents the position of the term in the sequence

.For the given sequence, the first term is -81, which corresponds to the first position in the sequence (n = 1).

The second term is 108, which corresponds to the second position in the sequence (n = 2).

The third term is -144, which corresponds to the third position in the sequence (n = 3).

The fourth term is 192, which corresponds to the fourth position in the sequence (n = 4).

Therefore, the formula that can be used to describe the sequence is: \(a(n) = (-1)^(n+1) * 3^(n) * 4.\)

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Distance can be defined as the amount of ground covered (traveled) by a physical object over a specific period of time and speed, regardless of its direction, starting point or ending point.

Mathematically, the distance (traveled) by a physical object can be calculated by using this formula:

Distance = speed × time

Making time the subject of formula, we have:

Time = distance/speed

Next, we would calculate the amount of time it will take for the two couriers to meet:

t = d/(Vm + Vn)

t = 8/(1 + 3)

t = 8/4

Time, t = 2 hours.

For the meeting time, we have:

Meeting time = 8:00 AM + 2 hours

Meeting time = 10:00 AM.

For the distance from M, we have:

Distance = 1 × 4

Distance = 4 km.

For the distance from N, we have:

Distance = 3 × 4

Distance = 12 km.

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Complete Question:

Two couriers leave two cities M and N(N is west of M) distant from each other 8kms and both go east. The one from M leaves at 6:00am and goes 1k/h and the one from N leaves at 8:00am and walks 3k/h. At what time did they meet and at what distance from M and N?

When graphing an exponential function, a T-chart is commonly used to determine the values. The correct answer is option A.

The T-chart employs positive real numbers since this is the most typical form of exponential function.

Exponential functions are utilized to represent processes that increase or decrease exponentially, as well as to model phenomena in many different disciplines, including science, economics, and engineering.

The exponential function can be represented by the following equation:

\(y=a^x\), where a is the base, x is the exponent, and y is the outcome.

When a is a positive number greater than one, the function is called exponential growth, while when a is a fraction between 0 and 1, the function is called exponential decay.

The T-chart is used to determine the values to use in the graph and connect the dots as required. Positive real numbers are used as the values in the T-chart in order to effectively graph the exponential function.

Therefore, the correct answer is option A.

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The correct answer is option D: The probability that an item is selected depends on the ease of selection.

Convenience sampling involves selecting items for a sample based on their easy availability or accessibility. This method does not follow the principles of statistical sampling, as it does not aim to provide a representative sample that reflects the characteristics of the entire population.

The correct answer is option D: The probability that an item is selected depends on the ease of selection. In convenience sampling, the probability of selecting an item is influenced by the ease and convenience of including it in the sample. Items that are more accessible or convenient to sample are more likely to be included, while those that are difficult to access or inconvenient may be overlooked. This leads to a nonuniform selection process, making convenience sampling nonstatistical.

Since convenience sampling does not guarantee a random or representative sample, the results obtained from such a sample may not be generalizable to the entire population. It can introduce bias and limit the external validity of the findings. Therefore, researchers often opt for other sampling methods, such as random sampling, to ensure the statistical validity and generalizability of their research.

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Developers determine the specifics of how to build a system in the design phase. b

The design phase and its importance:
Define Objectives:

The design phase begins after the completion of the analysis phase, where developers have gathered and evaluated requirements.

The main objective of the design phase is to create a blueprint for the system that addresses all identified requirements.
Create Architectural Design:

During this step, developers establish the overall structure of the system, including its components, their relationships, and the interactions between them.

This architectural design provides a high-level view of the system's organization.
Design System Components:

With the architectural design in place, developers focus on designing individual components or modules of the system. They create detailed specifications, which include the functionality, inputs, outputs, and processes for each component.
Design User Interface:

The user interface design involves creating a user-friendly and efficient way for end-users to interact with the system. This can include designing screen layouts, menus, buttons, and other interface elements.
Validate Design:

The final step in the design phase is to ensure that the proposed design meets all the requirements identified during the analysis phase.

Developers may use various methods, such as reviews and simulations, to validate their design before proceeding to the implementation phase.
The design phase is a crucial part of the system development process, as it defines how the system will be built, ensuring it meets the needs of its users and the project's objectives.

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Answer:

$24.48

Step-by-step explanation:

2.99+9.99+11.50+7.99/20/10/7 = $24.48

Since the probability is less than 5%, which is the conventional threshold for unusual results, we can conclude that the time of 14.5 seconds is unusual for this school's 100 meter sprint. Therefore, the correct answer is D) −1.5; unusual.

To solve this question, we need to calculate the z-score using the formula:

z = (x - μ) / σ

Where x is the individual time, μ is the mean time, and σ is the standard deviation.

Substituting the given values, we get:

z = (14.5 - 17.6) / 2.1 = -1.48

Since the calculated z-score is negative, we need to refer to the standard normal distribution table to find the corresponding probability. Looking up the z-score -1.48 in the table, we find that the probability is 0.0694 or approximately 6.94%.

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The procedure which is deemed to be the type of sample in discuss is; representative sample are free of bias.

Representative sampling and random sampling are two techniques used to help ensure data is free of bias. A representative sample on the other hand is a group or set chosen from a larger statistical population according to specified characteristics. A random sample is a group or set chosen in a random manner from a larger population.

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Answer:

yes each input (time in hours) has a unique output(cost)

Step-by-step explanation:

I did the test

Yes + has, i also did the test

Answer:

C

Step-by-step explanation:

Let's assume the number is x.

Negative means a minus or subtraction.

Decrease also means a minus or subtraction.

Three times the number which we have assumed to be x will be: 3*x=3x

The answer:

-13 - 3x

Answer:

y = 4

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Step-by-step explanation:

Step 1: Define

y = -37x + 4

x = 0

Step 2: Evaluate

The answer is D: An account earning interest compounded daily.

Answer:

Formula=√(x2-x1)²+(y2-y1)² =√(4-0)²+(9-13)2 =√16+16 =√32

Answer:  slope=-1

Step-by-step explanation:

9-13     -4

------   ---------    -4/4=-1

4-0       4

ANSWER

EXPLANATION

The Chairman and Co-Chairman are specific positions, so order matters. We first select the chairman out of 10 people and then, the Co-Chairman out of the 9 people left,

Answer:

(x, y ) → (x + 2, y + 3 )

Step-by-step explanation:

consider the coordinates of the centres of circles A and B

A (- 1, - 1 ) and B (1, 2 )

- 1 → 1 in the x- direction is + 2

- 1 → 2 in the y- direction is + 3

then translation rule is

(x, y ) → (x + 2, y + 3 )

The mapping statement for the transformation is: (x, y) -> (-(x) + 5, y + 3).

What is mapping?

In geometry, mapping is often used to describe transformations of geometric shapes, such as translations, rotations, reflections, and dilations.

Consider the triangle ABC, where A(1,-4), B(4,-4), and C(4,-2). Perform a reflection of this triangle over the y-axis, followed by a translation of 5 units to the right and 3 units up. Write the mapping statement for this transformation.

Solution:

The reflection over the y-axis can be represented by the mapping statement (x, y) -> (-x, y). Applying this to each vertex of the triangle ABC, we get:

A'(−1, −4), B'(−4, −4), C'(−4, −2)

Now, we apply the translation of 5 units to the right and 3 units up. This can be represented by the mapping statement (x, y) -> (x + 5, y + 3). Applying this to each vertex of the triangle A'B'C', we get:

A''(4, -1), B''(1, -1), C''(1, 1)

Therefore, the mapping statement for the transformation is:

(x, y) -> (-(x) + 5, y + 3)

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From an absolute value inequality, we have that:

\(|f(x)| \leq a\)

Which has solution:

\(-a \leq f(x) \leq a\)

In this problem:

\(|D - 6.5| \leq 0.04\)

Applying the solution:

\(-0.04 \leq D - 6.5 \leq 0.04\)

\(-0.04 \leq D - 6.5\)

\(D - 6.5 \geq -0.04\)

\(D \geq 6.46\)

\(\leq D - 6.5 \leq 0.04\)

\(D \leq 6.54\)

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