Please help me :( no ones helping me :( pls show how you got it too :( thank you ill give you all my points 30 points

Answer:

Step-by-step explanation:

x - 3y = -16

x + 2y = 4

-x + 3y = 16

x + 2y = 4

5y = 20

y = 4

x + 2(4) = 4

x + 8 = 4

x = -4

(-4, 4)

Answer:

105.66

Step-by-step explanation:

87.5 times 1.05= 91.875

then you do 91.875 times 1.15 = 105.656

Answer:

I got $105.66

Step-by-step explanation:

I multiplied the subtotal by .05(to represent sales tax %) then added the solution to $87.50. then I multiplied .15(tip) to $87.50. Added that to the previous solution and got $105.66. Read below for clarification.

87.50(.05) = 4.375(or 4.38)

87.50 + 4.375 = 91.875

87.50(.15) = 13.125

91.875 + 13.125 = $105.66

The hypotheses for the test are H₀: σ₁² = σ₂² and H₁: σ₁² ≠ σ₂². This is a two-tailed test to assess if there is a difference in the standard deviations of sound levels between the areas designated as "casualty doors" and operating theaters. The claim being investigated is whether or not there is a difference in the standard deviations.

The hypotheses for the test are:

H₀: σ₁² = σ₂² (There is no difference in the standard deviations of the sound levels between the areas designated as "casualty doors" and operating theaters.)

H₁: σ₁² ≠ σ₂² (There is a difference in the standard deviations of the sound levels between the areas designated as "casualty doors" and operating theaters.)

This hypothesis test is a two-tailed test because the alternative hypothesis is not specifying a direction of difference.

To substantiate the claim that there is a difference in the standard deviations, we will conduct a two-sample F-test at a significance level of 0.10, comparing the variances of the two groups.

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Answer:

Hello! answer: 28

Step-by-step explanation:

This is a complementary angle! So it will add up to 90 degrees so all we have to do is 90 - 62 so 90 - 62 = 28 so 28 is our answer!

Answer:  y = (6/5)x-8

Slope = 6/5 = 1.2

Y intercept = -8

==================================================

Work Shown:

m = 6/5 = 1.2 is the given slope

(x,y) = (5,-2) is the point the line goes through

y = mx+b .... slope intercept form

y = 1.2x + b .... plug in the given slope

-2 = 1.2*5 + b ... plug in the coordinates of the given point

-2 = 6 + b

-2-6 = 6+b-6 .... subtracting 6 from both sides

-8 = b

b = -8

The equation y = mx+b turns into y = 1.2x-8

This is equivalent to y = (6/5)x-8

Answer:

Angles: adjacent

x = 18

Step-by-step explanation:

Adjacent Angles: angles that border each other to the left/right

Vertical Angles: opposite set of angles that are congruent

Given these definitions, these angles are not only adjacent, but also right angles. Right angles add to 90°.

Step 1: Combine like terms.

Step 2: Divide both sides by 5.

Therefore, the answer is adjacent and x = 18.

Answer:

5^2 < 2^5

Step-by-step explanation:

2^5 = 2x2x2x2x2 = 32

5^2 =  5x5 = 25,

since 25 is less than 32, the comparison 5^2 < 2^5 is correct, or 25 < 32

The value of 2^5 is greater than 5^2.

An expression in maths a sentence with a minimum of two numbers or variables and at least one math operation.

Given that the same digits are used for the expression 2^5 and 5^2

2^5 = 32

5^2 = 25

Therefore, 2^5 > 5^2

Hence, The value of 2^5 is greater than 5^2.

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y = 30x

Calculate  the number of gallos of water used to water trees i'd 30 times the number of trees.

Let's take,

Number of gallons = y

Number of trees = x

Then, according to the problem,

Number of gallons = 30*(Number of trees)

So….. y = 30*x

y = 30x

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The measure of central location that is not sensitive to extreme values is the median.

Option (b) The median represents the middle value of a dataset when it is arranged in ascending or descending order. It is not influenced by extreme values or outliers.

Option (a) The mean is sensitive to extreme values because it takes into account all the values in the dataset, including the extreme values. A single extreme value can significantly affect the mean.

Option (c) The mode represents the value that appears most frequently in a dataset. It is not typically affected by extreme values, but if the dataset has multiple modes, it may not be a reliable measure of central location.

Therefore, The measure of central location that is not sensitive to extreme values is the median. the correct answer is (b) The median.

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Answer:

174m²

Step-by-step explanation:

SA = 2(wl + hl + hw)

= 2(5m x 11m + 2m x 11m + 2m x 5m)

= 2(55m² + 22m² + 10m²)

= 2 x 87m²

=174m²//

If Station 1 (at 74, 41) is 44 km away and Station 2( at 0,43 ) is 38 km away. The required approximate location of the GPS receiver is (42, 10).

The location of the GPS receiver can be determined with the help of trilateration. Trilateration is a process of determining absolute or relative locations of points by measurement of distances, using the geometry of circles, spheres, or triangles. If three stations (or more) are in known locations, with a known distance from the point of interest, we can determine the position of the GPS receiver with the help of trilateration.

It can be determined by the following method:

1: Plot the given stations on a coordinate plane. Stations are:

Station 1: (74, 41)

Station 2: (0, 43)

2: Calculate the distance of the GPS receiver from each station using the distance formula.

Distance Formula: The distance formula is used to find the distance between two points in the coordinate plane. The distance between points (x1,y1) and (x2,y2) is given by

d = √[(x2 - x1)² + (y2 - y1)²]

Station 1: Distance from station 1 = 44 kmSo, d1 = 44 km

Station 2: Distance from station 2 = 38 kmSo, d2 = 38 km

3: Plot the given distances as the circle on the coordinate plane.

Circle 1: Centred at (74, 41) with a radius of 44 km.

Circle 2: Centred at (0, 43) with a radius of 38 km.

4: The intersection of two circles. Circle 1 and Circle 2 intersect at point P (approx) (42, 10). So, the approximate location of the GPS receiver is (42, 10).

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A quadratic equation with the given solutions of 2√11 and -√/11 can be expressed as x^2 - 4√11x + 1 = 0, but there are multiple correct equations.

To find an equation with the given solutions, we start by using the fact that for a quadratic equation in the form ax^2 + bx + c = 0, the solutions can be determined using the quadratic formula: x = (-b ± √(b^2 - 4ac))/(2a).

Given the solutions 2√11 and -√/11, we can see that the square root of 11 is common in both solutions. We can therefore rewrite the solutions as 2√11 and -√11/11.

By comparing this with the quadratic formula, we can see that b = -4√11 and ac = 1. Plugging these values into the quadratic formula, we get x = (-(-4√11) ± √((-4√11)^2 - 411))/(21), which simplifies to x = (4√11 ± √(176 - 4))/(2).

To make the equation easier to work with, we can further simplify the expression as x = (4√11 ± √172)/(2). Finally, by rationalizing the denominator, we get x = (2√11 ± √43)/(1), which can be expressed as x^2 - 4√11x + 1 = 0.

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Answer:

a = 7

Step-by-step explanation:

Using the Cosine rule in the triangle

a² = b² + c² - (2bc cosA )

   = 2² + (5\(\sqrt{3}\) )² - (2 × 2 × 5\(\sqrt{3}\) × cos30° )

  = 4 + 75 - (20\(\sqrt{3}\) × \(\frac{\sqrt{3} }{2}\) ) ← exact value of cos30°

 = 79 - ( 10 × 3)

 = 79 - 30

 = 49 ( take square root of both sides )

a = \(\sqrt{49}\) = 7

Answer:

a = 7

Step-by-step explanation:

a² = b² + c² - 2bc × cos α

a² = 2² + ( 5√3 )² - 2 × 2 × 5√3 × \(\frac{\sqrt{3} }{2}\)

a² = 49

a = 7

From the problem, we have :

The common factor will be 6x, this will be :

The answer is :

A line chart is a special type of scatter plot in which the data points in the scatter plot are connected with a line. A line chart is a graphical representation of data that is used to display information that changes over time. The line chart is also known as a line graph or a time-series graph. The data points are plotted on a grid where the x-axis represents time and the y-axis represents the value of the data.

The data points in the scatter plot are connected with a line to show the trend or pattern in the data. Line charts are commonly used to visualize data in business, economics, science, and engineering.Line charts are useful for displaying information that changes over time. They are particularly useful for tracking trends and changes in data. Line charts are often used to visualize stock prices,

sales figures, weather patterns, and other types of data that change over time. Line charts are also used to compare two or more sets of data. By plotting multiple lines on the same graph, you can easily compare the trends and patterns in the data.Overall, line charts are a useful tool for visualizing data and communicating information to others. They are easy to read, understand, and interpret, and can be used to display a wide range of data sets.

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Answer:

f(-1) = -1

Step-by-step explanation:

f(x) = -x^2

Let x = -1

f(-1) = - ( -1) ^2

       = -1

Answer:

8, 26 and 19

Step-by-step explanation:

Perimeter is the length of all sides of a polygon. It is simply the length of the boundary around a closed shape. Perimeter of a triangle = Sum of all three sides.

Hence,

\(\Rightarrow\) n + 3n + 2 + 4n - 13 = 69 (acc. to Q)

\(\Rightarrow\) n + 3n + 4n + 2 - 13 = 69

\(\Rightarrow\) 8n - 11 = 69

\(\Rightarrow\) 8n = 80

\(\Rightarrow\) n = 80/10

\(\Rightarrow\) n = 8

Length of all three sides:

Stephen's average speed for the round trip was 48 mph.

To find Stephen's average speed, we can use the formula:

Average Speed = Total Distance / Total Time

Let's assume the distance from Stephen's house to his aunt's house is 'd' miles.

On the way to his aunt's house, Stephen traveled at a speed of 60 mph. So the time taken for this leg of the trip is given by:

Time = Distance / Speed = d / 60

On the return trip, Stephen traveled at a speed of 40 mph. So the time taken for this leg of the trip is:

Time = Distance / Speed = d / 40

The total time for the round trip is the sum of the times for the outward and return trips:

Total Time = d / 60 + d / 40

To find the average speed, we divide the total distance by the total time:

Average Speed = Total Distance / Total Time

The total distance for the round trip is 2d (since it's the same roadway for both trips).

Average Speed = 2d / (d / 60 + d / 40)

Simplifying this expression, we get:

Average Speed = 2d / ((3d + 2d) / 120) = 2d / (5d / 120) = 2d * 120 / 5d = 240 / 5 = 48 mph

Therefore, Stephen's average speed for the round trip was 48 mph.

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Answer:

understand

Step-by-step explanation:

The fixed amount Geet earns for each television is $60.

Length of sides:

Surface Area:

(perimeter of base)(length) + (base)(height)

(8+10+6)(4)+(8)(6)

(24)(4)+48

96+48

144 ft²

Answer:4.62x10^13

Step-by-step explanation:

When Kimai is making blankets for charity, the proper form of the unit rate is 4 hats per hour.

From the information given, it was stated that Kimai is making blankets for charity. In order to determine how many hats she can make per hour, she created 3/5 of the hats in 1/8 of an hour.

Therefore, the proper form of the unit rate will be:

= Amount of hats / Time

= 3/5 ÷ 1/8

= 3/5 × 8/1

= 4.8

Therefore, the proper rate will be 4 hats per hour.

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Answer: 4 hats per hour

Step-by-step explanation:

Answer:

X = 2

Step-by-step explanation:

y = 3x +2

y = x + 6

x + 6 = 3x + 2

6 = 2x + 2

4 = 2x

x = 2

Answer:

The y-intercepts of the quadratic are (0, 25)

Step-by-step explanation:

Hope I helped, have a good day

Answer:

-300

Step-by-step explanation:

Step 1:  Find the amount Elmer's funds decreased after purchasing the rabbits:

Let x represent Elmer's funds.

Since Elmer bought five rabbits for $10 each, he lost $10 5 times.

x - (10 * 5)

x - 50

Thus, Elmer lost (spent) $50 for the 5 rabbits.

Step 2:  Find the amount Elmer's funds decreased after purchasing the  cupboards:

Since Elmer bought four cupboards for $70 each, he lost $70 4 times:

x - (50 + (70 * 4))

x - (50 + 280)

x - 330

Thus, after purchasing the rabbits and cupboards, Elmer lost $330.

Step 3:  Find the amount Elmer's funds increased after finding the twenty-dollar bill:

Since Elmer found a twenty-dollar bill, he gained $20

x - (330 + 20)

x - 310

Step 4:  Find the amount Elmer's funds increased after returning one rabbit:

Since Elmer returned one rabbit, he gained $10:

x - (310 + 10)

x - 300

Thus, Elmer's funds changed totally by -$300.

Putting all the information together, we have:

x - 10 - 10 - 10 - 10 - 10 - 70 - 70 - 70 - 70 + 20 + 10

x - 50 - 280 + 30

x - 330 + 30

x - $300

Answer:

A = 88 units²

Step-by-step explanation:

the area (A) of a trapezoid is calculated as

A = \(\frac{1}{2}\) h (b₁ + b₂ )

h is the height between the bases and b₁, b₂ are the bases

here h = 4 , b₁ = 17 + 5 + 5 = 27 , b₂ = 17 , then

A = \(\frac{1}{2}\) × 4 × (27 + 17) = 2 × 44 = 88 units²

Out of the given options, the one that is not an advantage of using a sample versus a census is population size. The reason for this is that whether you use a sample or a census, the population size remains the same. However, there are several advantages to using a sample over a census.

Firstly, a sample generates a smaller dataset to analyze, which can save time and resources. Secondly, using a sample can be less expensive than conducting a census, which involves surveying every member of the population. Lastly, using a sample provides ready access to respondents, as it is often easier to reach a smaller group of people than an entire population. However, it is important to note that using a sample also has its limitations, such as the potential for sampling bias and the need to ensure that the sample is representative of the population being studied. Overall, the choice between using a sample or a census depends on the research question, available resources, and the level of accuracy and precision required.

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