Complete each box with the missing operation or missing equation. use linear combination to solve {7x+2y=7 11x+5y=2

Answer:

48 degrees

Step-by-step explanation:

7X-1+12x+48=180

19x+47=180

19x=133

x=7

7(7)-1=A

49-1=A

48=A

A is 48 degrees

The most appropriate choice for domain of a  functions will be given by -

What is a domain of a function

A function from A to B is a rule that assigns to each element of A a unique element of B. A is called the domain of the function and B is called the codomain of the function.

There are different operations on functions like addition, subtraction, multiplication, division and composition of functions.

The set of values for which the function is defined is called domain of the function.

Here, from the graph, the set of values of x axis for which the graph is drawn is \(-6\leq x \leq 6\).

And values of x - axis represents the domain.

So domain of function is {x ∈ \(\mathbb{R}\), \(-6 \leq x \leq 6\)}

Third option is correct.

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The volume of the right rectangular prism is the amount of cubes in it

The formula to determine the volume of the right rectangular prism is V(n) = n

The question is incomplete; as the figure is not given.

So, I will provide a general solution

The volume of a one inch cube is:

\(V = 1^3\)

\(V = 1\)

Assume the number of one inch cubes used to fill the right rectangular prism is n.

Then the volume of the right rectangular prism would be:

\(V(n) = n * 1\)

This gives

\(V(n) = n\)

Hence, the general formula to determine the volume of the right rectangular prism is V(n) = n

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Answer:

He should have done 8^2 + 15^2= x^2 because the hypotenuse is always the longest side and in Pythagorean theorem C represents the longest side

\( {x}^{2} = {(8)}^{2} + {(15)}^{2} \)

\( {x}^{2} = 64 + 225\)

\( {x}^{2} = 289\)

\(x = \sqrt{289} \)

\(x = 17\)

Company A has a higher risk percentage (55%) compared to Company B (3%).

To compute the Coefficient of Variation (CV) for each company, we need to use the formula:

CV = (Standard Deviation / Mean) * 100

Let's calculate the CV for each company:

For Company A:

Risk Percentage = 55%

Return = 14%

For Company B:

Risk Percentage = 3%

Return = 14%

Since we don't have the standard deviation values for each company, we cannot calculate the exact CV. However, we can still compare the riskiness of the two companies based on the provided information.

The Coefficient of Variation measures the risk relative to the return. A higher CV indicates higher risk relative to the return, while a lower CV indicates lower risk relative to the return.

In this case, Company A has a higher risk percentage (55%) compared to Company B (3%), which suggests that Company A is riskier. However, without the standard deviation values, we cannot make a definitive conclusion about the riskiness based solely on the provided information. The CV would provide a more accurate measure for comparison if we had the standard deviation values for both companies.

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Answer:

unit rate of 3mins is,given that 15meters of 3 is a meter is 100decimeter that is 15m =15×100=1500/3=5 the and is A

Answer:

x= 180 - 31 + 40

Step-by-step explanation:

Answer:

Its the first one  X = 180 - 31 + 40 :))

In the second step of solving the inequality 5x - 9 < 91, the property used is the addition property of inequalities.

This property states that adding the same value to both sides of an inequality does not change the inequality's direction. By adding 9 to both sides of the inequality, we aim to isolate the variable term. The inequality becomes 5x < 100.

The addition property allows us to perform this operation and maintain the validity of the inequality. It is a fundamental property in solving inequalities, enabling us to simplify and manipulate expressions.

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Answer:

4.08

Step-by-step explanation:

Option 2 is correct that is 1.79

When presented in ascending order, the value that 75% of data points fall within is known as the higher quartile, or third quartile (Q3).

The quartiles formula is as follows:

Upper Quartile (Q3) = 3/4(N+1)

Lower Quartile (Q1) = (N+1) * 1/3

Middle Quartile (Q2) = (N+1) * 2/3

Interquartile Range = Q3 -Q1,

1.74, 0.24, 1.56, 2.79, 0.89, 1.16, 0.20, and 1.84 are available.

Sort the data as follows: 0.20, 0.24, 0.89, 1.16, 1.56, 1.74, 1.84, 2.79 in ascending order of magnitude.

The data set has 8 values.

hence, n = 8; third quartile: 3/4 (n+1)th term

Q3 =3/4 of a term (9) term

Q3 =27/4 th term

Q3 = 1.74 + 1.84 / 2 (average of the sixth and seventh terms)

equals 1.76

Thus Q3 is 1.76 that is option 2

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The possible values for theta, where 0 degrees is less than theta and 360 degrees is greater than theta, would correspond to an angle measure in the range 0 < theta < 360 degrees.

This range includes all angles greater than 0 degrees and less than 360 degrees, which correspond to a full revolution around a circle.

It's important to note that angle measures are typically represented in either degrees or radians, with 360 degrees corresponding to 2π radians. So, if you need the values of theta in radians, the range would be 0 < theta < 2π.

In general, the possible values for theta are dependent on the context in which they are used and the specific system of measurement being employed. For example, in some cases, the range of possible values for theta may be restricted to between 0 and 180 degrees, or between -180 and 180 degrees, depending on the application.

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It is true that the existence of two local maxima does not guarantee the presence of a local minimum. It is possible for a function to have multiple local maxima and no local minimum.

For example, consider the function f(x,y) = x^4 - 4x^2 + y^2. This function has two local maxima at (2,0) and (-2,0), but no local minimum. Therefore, the statement "if f(x,y) has two local maximal, then f must have a local minimum" is false. The presence or absence of local maxima and minima depends on the behavior of the function in the immediate vicinity of a point, and cannot be determined solely based on the number of local maxima. It is possible for a function to have an infinite number of local maxima and minima, or none at all. Therefore, it is important to carefully analyze the behavior of a function in order to determine the presence or absence of local extrema.

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Answer:

y=1

Step-by-step explanation:

there is no slope therefore dont place it. however there is a Y intercept.

The two stores at points A and C would serve the residents of Miniville, providing them access to essential goods and services, with residents in the middle mile having the flexibility to choose between the two stores.

If one store is located at point A and the other store is located at point C, it means that the stores are located at the extremes of the 3-mile stretch of Lake Shore Drive in Miniville. Point B would be the midpoint between points A and C.

Given that the 300 residents of Miniville are evenly distributed along the 3 miles of shoreline on the lake, it implies that there are approximately 100 residents per mile.

Therefore, the store located at point A would serve the residents living in the westernmost mile of Lake Shore Drive, while the store located at point C would serve the residents living in the easternmost mile of Lake Shore Drive.

The residents living in the middle mile, between points A and C, would have the option to shop at either store, depending on their preference or convenience.

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Answer:

(4,1)

Step-by-step explanation:

Answer:

The answer is (4,1)

Step-by-step explanation:

I can confirm cause I took the test :)

A statistical analysis is internally valid if option B is correct, meaning that the statistical inferences about causal effects are valid for the population studied. Internal validity refers to the accuracy of conclusions drawn from a study, specifically focusing on causal relationships within the population being analyzed.

Statistical analysis is a method of examining data to identify patterns and trends, which can help researchers make informed decisions. Regression is a technique used to determine the relationship between two or more variables, where one variable (the dependent variable) is affected by one or more other variables (independent variables).

The population refers to the entire group of individuals or objects being studied. In order to have internal validity, the statistical analysis must accurately represent the population's characteristics and the causal relationships between variables.

R² (option A) is a measure of how well the regression model fits the data but doesn't necessarily imply internal validity. Option C, t-statistics, is related to hypothesis testing and helps determine if a relationship between variables is statistically significant. However, having all t-statistics greater than |1.96| doesn't guarantee internal validity.

Lastly, option D states that the population is small (less than 2,000) and can be observed. While having a smaller population might make it easier to gather data, this does not guarantee internal validity.

In summary, internal validity is achieved when the statistical inferences about causal effects are valid for the population studied (option B). It ensures that the conclusions drawn from a study are accurate and represent the true relationships within the population.

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Answer:

6

Step-by-step explanation:

F = 4 x 6 / 2^2

= 6

Answer:

y = 8

x = 3

Step-by-step explanation:

5x+y=23

3x+y=17

cancel out the Xs

 15x + 3y = 69

-15x - 5y = -85

-2y = -16

y = 8

Plug in 8 for the Y in any of the equations it doesn't matter

3x + y = 17

3x + 8 = 17

3x = 9

x = 3

hope this helps

Answer:

dfgdfghjkh

Step-by-step explanation:

Answer:

b3(−6b6+b5+9b3+b2−3)

Step-by-step explanation:

−6b9+b8+9b6+b5−3b3

−6b9+b8+9b6+b5−3b3

=b3(−6b6+b5+9b3+b2−3)

Answer:

120 minutes

Step-by-step explanation:

20km/h=40mins

20×3=60

40×3=120

Answer: x=16

Step-by-step explanation: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    -9/8*x-7-(-25)=0

simplify 9/8

((0 -  (9/8 • x)) -  7) -  -25  = 0

 Subtracting a whole from a fraction

Rewrite the whole as a fraction using  8  as the denominator

7 = 7/1 = 7*8/8

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

  -9x - 56  =   -1 • (9x + 56)

   Adding up the two equivalent fractions

(-9x-56) - (-25 • 8)/8     144 - 9x/8

  144 - 9x  =   -9 • (x - 16)

When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, multiply both sides of the equation by the denominator.

Here's how:

 -9•(x-16)/8 • 8 = 0 • 8

Now, on the left hand side, the  8  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

  -9  •  (x-16)  = 0

   Solve  :    x-16 = 0  

Add  16  to both sides of the equation :  

                     x = 16

Answer: x=16

Step-by-step explanation: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                   -9/8*x-7-(-25)=0

simplify 9/8

((0 -  (9/8 • x)) -  7) -  -25  = 0

Subtracting a whole from a fraction

Rewrite the whole as a fraction using  8  as the denominator

7 = 7/1 = 7*8/8

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

 -9x - 56  =   -1 • (9x + 56)

  Adding up the two equivalent fractions

(-9x-56) - (-25 • 8)/8     144 - 9x/8

 144 - 9x  =   -9 • (x - 16)

When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, multiply both sides of the equation by the denominator.

Here's how:

-9•(x-16)/8 • 8 = 0 • 8

Now, on the left hand side, the  8  cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

 -9  •  (x-16)  = 0

  Solve  :    x-16 = 0  

Add  16  to both sides of the equation :  

                    x = 16

The number of pages that were sent or received beyond the 40 page limit under the plan was 70 pages.

Given that an online fax company, EFaxlt.com, has a customer plan where a subscriber pays a monthly subscription fee of $12.75 dollars and can send/receive 40 fax pages at no additional cost. For each page sent or received past the 40 page limit, the customer must pay an overage fee of $0.06 per page.

Let p be the number of pages that were sent or received beyond the 40 page limit under the plan. Thus, the total number of pages sent or received within the plan is (40 + p).Since the monthly bill under this plan comes out to be $16.47, the total cost, in dollars, to send p pages beyond the plan's monthly limit is given byC = 0.06p + 12.75= $16.47Therefore,0.06p + 12.75 = 16.47Solve for p,0.06p = 16.47 - 12.750.06p = 3.72p = 3.72/0.06p = 62

Therefore, the number of pages that were sent or received beyond the 40 page limit under the plan was 70 pages (p + 40)

The total number of pages that were sent or received beyond the plan's monthly limit was 70 pages.

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Answer:

40degrees

Step-by-step explanation:

Complete question

four pieces of pie were eaten from a pie cut into equal parts. The 5 pieces that remained created an angle that measured 200°. What was the angle measure of one piece of pie

The total angle in the pie is 360degrees (since it is circular in nature)

Remaining angle = 360 - angle created by the last piece

Remaining angle = 360 - 200

Remaining angle = 160

Since the remaining angle is divide into 4 parts

angle measure of one piece of pie = 160/4

angle measure of one piece of pie = 40degrees

To determine the Mean Absolute Deviation (MAD), we need the actual sales data and the forecasted values. Since the actual sales data is not provided, it is not possible to calculate the MAD accurately.

MAD is calculated by taking the average of the absolute differences between the forecasted values and the actual values. Without the actual sales data, we cannot compute the absolute differences and find the MAD.

To calculate the MAD, you will need the actual sales data and the corresponding forecasted values for each day. Then, you can calculate the absolute differences between the actual and forecasted values, take their average, and round the result to two decimal places to obtain the MAD.

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Answer:

y = 85

Step-by-step explanation:

120% times y = 102

That's how you write the equation.

In this case, we'll have to carry out several steps to find the solution.

Step 01:

Data:

P(x) = 40x - 0.9x² - 420

Step 02:

marginal profit:

P(x) = 40x - 0.9x² - 420

P'(x) = 40 - (0.9)(2)x

P'(x) = 40 - 1.8x

if x = 150:

P'(150) = 40 - 1.8(150) = - 230

if x = 300:

P'(300) = 40 - 1.8(300) = - 500

The answer is:

P'(150) = - 230

P'(300) = - 500

Answer:

k=2

Step-by-step explanation:

2x+y=1 (1)

(1)×2: 4x+2y= 2

The y-intercept of both lines must be the same as if the y-intercept is different, it will have no solutions instead of infinite solutions. In order to achieve infinite solutions, both lines must be on the same points and have same gradient and same y-intercept.

Hence, k= 2

Answer: k=2

Step-by-step explanation:

If the two equations 2x+y=1, 4x+2y=k have infinite number of solutions, it means that the two equations are dependent and represent the same line. To check this, we can find the ratio of the coefficients of x and y in the two equations:2/4 = 1/2

1/2 = k/1

From the first ratio, we can see that the coefficient of x in the second equation is twice that of the first equation.

Similarly, the coefficient of y in the second equation is twice that of the first equation. Therefore, the second equation is just a multiple of the first equation.Solving the first equation for y, we get y = 1-2x. Substituting this into the second equation, we get:4x + 2(1-2x) = k

4x + 2 - 4x = k

2 = k

Therefore, the value of k is 2.

The account balance (future value) of the employee's investment in a 401k plan, rounded to the nearest dollar, after two years is B. $3,796.

The future value refers to the compounded present value.

Compounding involves charging interest on accumulated interest and principal over the periods.

The future value can be determined using an online finance calculator.

N (# of periods) = 24 months (2 years x 12)

I/Y (Interest per year) = 5.5%

PV (Present Value) = $0

PMT (Periodic Payment) = $150

Results:

Future Value (FV) = $3,796.28

Sum of all periodic payments = $3,600 ($150 x 24)

Total Interest = $196.28

Thus, the employee's balance (future value) in the 401k plan after two years is Option B.

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Answer:

\(y = -2x+4\)

Step-by-step explanation:

Linear equations can be written in the form \(y=mx+b\) where \(m\) is the gradient/slope and \(b\) is the y-intercept of the line.

With the given slope and y-intercept, the linear equation of the line can be written as \(y=-2x+4\).