help me guys???????????????

Answer:

37.5=d

Step-by-step explanation:

d+30 = 1.8d

add coefficient 1 to D so it's less confusing

1d +30 = 1.8d

isolate d

-1d

30= .8d

multiply by inverse to make d 1 whole

× 5/4 or 1.25

37.5 = d

The value of angle S is 53°

Exterior angle theorem states that the measure of an exterior angle of a triangle is equal to the sum of two remote interior angles.

With this theorem we can say that

7x+2 = 4x+13+19

collecting like terms

7x -4x = 13+19-2

3x = 30

divide both sides by 3

x = 30/3

x = 10

Since x = 10

angle S = 4x+13

angle S = 4(10) +13

= 40+13

= 53°

Therefore the measure of angle S is 53°

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Answer:

$31.90

Step-by-step explanation:

Hope it helps :)

Have a good day/night

Brainliest pls?

98% confidence Interval for the mean number of hours a student studies per week is (21.0208,18.9792)

mean x = 16

standard deviation σ = 2.4

sample size n = 65

z score for 98% = 2.576

Interval = x±z*s/

= 16±2.576*2.4/

= 16±2.576*0.39629

= 16±1.0208

Interval = (21.0208,18.9792)

Therefore 98% confidence Interval for the mean number of hours a student studies per week is (21.0208,18.9792).

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Answer:

0.315

Step-by-step explanation:

act like the fraction is a division problem divide 6 by 19.

this decimal is a repeating decimal so it will never end rounded to the thousandth place it is 0.315

Answer:

≈ 8.9

Step-by-step explanation:

Assuming you are requiring the length of the unknown side

let the side ( hypotenuse ) be x

Using Pythagoras' identity

The square on the hypotenuse ie equal to the sum of the squares on the other 2 sides, that is

x² = 4² + 8² = 16 + 64 = 80 ( take square root of both sides )

x = \(\sqrt{80}\) ≈ 8.9 ( to 1 dec. place )

Hello :D

If you are trying to work out area you have to do:

8cm x 4cm = 24cm

If you are trying to work out the perimeter then you have to work out the distance around the shape

The expression that represents the value of sin C - cos C is s-r

From the triangle ABC, since sin B = r and cos B = s.=, hence;

If m<C is the reference angle, then;

Opposite side= s

Adjacent side = r

Hypotenuse = 1

Sin C = s and cos C = r

Hence the expression that represents the value of sin C - cos C is s-r

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The given rational and irrational numbers can be ordered from least to greatest as follows; -2 3/5 < 10/3 < 3 7/8 < 3.9 < √20.

It follows from the task content that the numbers given are rational and irrational numbers.

To order the numbers, they should be converted to decimal numbers as follows;

-2 3/5 = -2.6

√20 = 4.47

3.9 = 3.9

10/3 = 3.33

3 7/8 = 3.875

Hence, the order from least to greatest is; -2 3/5 < 10/3 < 3 7/8 < 3.9 < √20.

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Answer:

900 ml of milk

Step-by-step explanation:

the scale is 1:1 so just multiply by 3

Answer:

0/04/18. through (5,2)), parallel to y=7/5x+4. slope intercept form.

Step-by-step explanation:

The negative sign indicates that the car is 80 km to the West of the starting point.

In mathematics, a coordinate is a numerical value that represents a particular point on a line, plane, or space. Coordinates are used to locate points and describe their position relative to a reference point or system. The number of coordinates required to specify a point depends on the dimensionality of the space. For example, a point in one-dimensional space (a line) requires one coordinate, a point in two-dimensional space (a plane) requires two coordinates, and a point in three-dimensional space (a space) requires three coordinates. The most common coordinate systems are Cartesian coordinates, which use a system of perpendicular lines to define a point's location, and polar coordinates, which use angles and distances from a fixed point to define a point's location.

Here,

To solve this problem, we need to use the concept of displacement. Displacement is the shortest distance between the starting point and the ending point of a journey. First, we need to find the total distance traveled by the car.

Distance traveled while heading East = 80 km/hour × 3 hours

= 240 km

Distance traveled while heading West = 80 km/hour × 4 hours

= 320 km

Total distance traveled = 240 km + 320 km

= 560 km

Now, we can find the displacement of the car. Since the car traveled in opposite directions, we need to subtract the distance traveled towards West from the distance traveled towards East.

Displacement = 240 km - 320 km

= -80 km

The negative sign indicates that the car is 80 km to the West of the starting point.

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Complete question:

A car leaves a place and heads East for 3 hours. Then, it heads straight West for 4 hours. The car maintained a speed of 80 km per hour throughout the trip. What is the position of the car in relation to the starting point?

The smallest number of instances at which the acceleration of the plane could equal zero on the open interval 0 < c < 6 is t= 25 to t= 30.

By the mean value theorem, somewhere between t = 0 and t = 15 , v'(t) = 0, because v(15)-v(0)/15-0 = 0. Also somewhere between t=25 and t=30, v'(t) = 0, because v(30) - v(25) / 30 - 25 = 0. This means a(t) = 0 for at least two values of t.

f(t) = 6+cos(t/10)+3sin(7t/40)

a(t) = f'(t) = 1/10 sin (t/10) + 21/40 cos (7t/40)

f'(23) = -.408 miles/min²

Average Velocity = 5.916 miles per minute

Average Speed is characterized as the adjustment of position or displacement of the object (∆x) partitioned when the time interval (∆t) in which the displacement happens. The average speed can be a positive or negative sign on the indication of the displacement of the object.

The total distance that the plane flies in 40 min is 229 miles.

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No, a correlation coefficient of -1 does not imply that two variables are not related.

A correlation coefficient measures the strength and direction of the linear relationship between two variables. When the correlation coefficient is -1, it indicates a perfect negative linear relationship between the variables. In other words, as one variable increases, the other variable decreases in a consistent manner.

While the correlation coefficient of -1 suggests a strong linear relationship, it does not imply that the variables are not related at all. Other types of relationships, such as nonlinear or curvilinear, may exist between the variables.

Therefore, even with a correlation coefficient of -1, the variables can still be related, albeit through a different type of relationship.

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In summary, when repeated samples of size n are taken from a normal population with an unknown variance, the statistic t follows the t-distribution with n-1 degrees of freedom.

If repeated samples of size n are taken from a normal population with an unknown variance, then the statistic t follows the t distribution with n-1 degrees of freedom. When a sample of size n is taken from a normal population with a known variance and mean, the sample mean follows a normal distribution with a mean of μ and a variance of σ2/n. This distribution is known as the sampling distribution of the mean.

However, when the variance is unknown, the sampling distribution of the mean can no longer be calculated using the normal distribution. In this scenario, the sample mean is calculated using a t-distribution instead of a standard normal distribution.The t-distribution is similar to the standard normal distribution. However, it is more spread out and flatter than the standard normal distribution. As a result, the t-distribution has thicker tails than the standard normal distribution, which makes it more suitable for analyzing small samples of data.

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The correct option is the standard deviations of the variables.

What is correlation?

Any statistical relationship between two random variables or bivariate data, whether causal or not, is referred to in statistics as correlation or dependence.

Correlation is a term used to describe the linear relationship between two entities. When using a correlation tool, the variables must be present in quantities of two or more to test their relationship (degree of association).

In order to scale the measurement between two variables connected to a similar sample, the standard deviation measures dispersion.

The variables' standard deviations are the best choice as a result.

Option involving the standard errors of the variables is incorrect because standard error, which stands for standard deviation, determines the relationship between dependent and independent variables.

Option involving the coefficients of variation of two variables is incorrect because the coefficient expressing standard deviation and mean ratio determines how much variation there is.

Option The means of the variables are incorrect because they are not a scale for determining the correlation between two variables.

Hence, the correct option is the standard deviations of the variables.

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Complete question:

The correlation between two variables related to the same sample is a scaled quantitative measure. What is used to scale this measurement?

- the standard deviations of the variables

- the standard errors of the variables

- the coefficients of variation of the two variables

- the means of the variables

For a normal distribution of property crime rates (per 100,000 residents) for the 50 states, percentage of the states had property crime rates between 3362 and 4055 is equals to the 44.1%.

In 2005, We have property crime rates for the 50 states and the District of Columbia. The rate is per 100,000 residents. Mean = 3477

Standard deviations = 747

Consider the distribution of property crime rates is normal distribution. We have to determine the percentage of the states had property crime rates between 3362 and 4055, P( 3362 < X < 4055).

Using the Z-Score formula for normal distribution, \(z = \frac{X- \mu}{\sigma} \)

where X --> observed value

mu --> mean

sigma --> standard deviations

For observed value, X = 3362

\(z = \frac{ 3362 - 3477}{747}\)

= −0.154

For observed value, X = 4055

\(z = \frac{ 4055 - 3477}{747}\)

= 0.774

Now, the required probability, P( 3362 < X < 4055) can be written as

\(= P( \frac{ 3362 - 3477}{747} < \frac{ X - \mu}{\sigma} <\frac{4055 - 3477}{747} )\)

= P( -0.15 < z <0.77 )

= P(z< 0.77) - P( z < - 0.15)

Using the normal distribution table,

= 0.441 - 0.881

= P( 3362 < X < 4055) = 0.441

Hence required percentage value is equals to 44.1%.

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Answer:

7 feet long

Step-by-step explanation:

This set up will give a right angle triangle where;

Length of the ladder is the hypotenuse = x

The distance of the ladder to the house is the adjacent = 3 feet

Angle of elevation theta = 72 degrees

Using the CAH in trigonometry identity;

cos theta = adjacent/hypotenuse

cos 72 = 3/hyp

hyp = 3/cos72

hyp = 3/0.4258

hyp = 7.05 feet

Hence the ladder is approximately 7 feet long

a) Rocky Mountain should order 200 tires each time it places an order.

b) The total cost of this policy is $17,160.

a) To determine how many tires Rocky Mountain should order each time, we need to consider the different price levels and find the point where it is most cost-effective to order. Let's analyze the three price levels:

If fewer than 200 tires are ordered: The purchase price is $25 per tire.

If 200 or more, but fewer than 8,000 tires are ordered: The purchase price is $17 per tire.

If 8,000 or more tires are ordered: The purchase price is $13 per tire.

Since the ordering cost is $35 per order, it is most cost-effective to order the maximum quantity that falls within the second price level, which is 200 tires.

b) To calculate the total cost of this policy, we need to consider the ordering cost and the holding cost. The holding cost is 40% of the purchase price per tire per year. Let's calculate the total cost:

Total holding cost = (Purchase price per tire * Quantity ordered * Holding cost rate) / 2 = (($17 * 10,000 * 0.4) / 2) + (($13 * 2,000 * 0.4) / 2) = $34,000 + $5,200 = $39,200

Total cost = Total ordering cost + Total holding cost = (Ordering cost per order * Number of orders) + Total holding cost = ($35 * (10,000 / 200)) + $39,200 = $1,750 + $39,200 = $40,950

Therefore, the total cost of this policy is $40,950.

Rocky Mountain Tire Center should order 200 tires each time it places an order, resulting in a total cost of $40,950 for this policy. This ordering quantity and cost analysis allows Rocky Mountain to make efficient and cost-effective decisions in managing their inventory.

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The performance score associated with the c grade is 157, and the performance score associated with the a grade is 355.

The z-score is a numerical measurement used in statistics to indicate how many standard deviations a particular value is from the mean of a dataset. It is calculated by subtracting the mean from the data point and dividing the result by the standard deviation. The resulting number is the z-score. The z-score is a useful tool for identifying outliers in a dataset, as values with z-scores that are too high or too low can be easily identified. Z-scores can also be used for comparing data points from different datasets, as z-scores are independent of the mean and standard deviation of the dataset. Z-scores can also be used for comparing data points from different datasets, as z-scores are independent of the mean and standard deviation of the dataset. This makes them ideal for normalizing data from different sources or for comparing data from different time periods or from different locations.

The z-score associated with the 9th percentile from the standard normal distribution is -1.28, and the z-score associated with the 91st percentile is 1.28.

b. (2 points) what are the performance scores associated with the c grade and the a grade?

The performance score associated with the c grade is 157, and the performance score associated with the a grade is 355.


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Answer:

Step-by-step explanation:

Nets of rectangular prisms are made up of rectangles and squares. Finding the areas of each of the rectangles and squares of the net of a rectangular prism and adding up those areas gives the surface area or total surface area of the prism

Answer:

Step-by-step explanation:

Given

\(2r + 4 = y + 2\)

\(2-r = y\)

\(y=-22 + 16 +34\)

\(r- y = 13\)

Required

Determine which is not a function

A [linear] function is always in the form:

\(y = mx + b\)

Checking each of the given options:

A.

\(2r + 4 = y + 2\)

Subtract 2 from both sides

\(2r + 4 - 2= y + 2 - 2\)

\(2r + 2= y\)

Reorder

\(y = 2r + 2\)

B.

\(2 - r = y\)

Reorder

\(y = 2 - r\)

C.

\(y=-22 + 16 +34\)

\(y=28\)

D.

\(r- y = 13\)

Subtract r from both sides

\(r - r - y = 13 - r\)

\(- y = 13 - r\)

Multiply both sides by -1

\(y = -13 + r\)

\(y = r - 13\)

Only option C does not conform with the general form \(y = mx + b\)

Hence;

Option C answers the question

The solution will be that the home-decorating company will require 42 yards of fabric for the customer's window treatments.

As per the information we have received from the question,

A single window requires 13 yards and a double window requires 16 yards of fabric. We are asked to find out the length of fabric that will be required by the home-decorating company, in case there were 2 single windows and 1 double window. The total amount of fabric that will be required by the home-decorating company is hence equal to

13×(no of single windows)+ 16×(no of double windows)

Here, no of single windows= 2

And, no of double window= 1

Hence, total fabric length=13×2 + 16×1=26 + 16=42 yards

Hence the solution is 42 yards of fabric.

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A critical value, z Subscript alphas is (c) z-score with an area of ?? to its left.

A critical value, denoted as z (Subscript α/2), is a point on the standard normal distribution curve, which is used in hypothesis testing. It helps to determine whether to accept or reject the null hypothesis. In this context, the critical value denotes the z-score with an area of ?? to its left, which represents the probability of observing a value more extreme than the critical value in the left tail of the distribution.

The critical value z Subscript α/2 signifies the z-score with an area of ?? to its left on the standard normal distribution curve, which is crucial for hypothesis testing.

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The volume of the solid is 16π/3 cubic units.

What is the volume of the solid?

The volume of a solid in mathematics is the measure of the space occupied by the solid. It can be calculated using methods such as the disk method or the shell method, depending on the shape of the region being rotated.

To find the volume of the solid obtained by rotating the region bounded by the curves y^2 = x and x = 2y about the x-axis, we would use the disk method. The disk method involves slicing the solid into infinitesimally thin disks, and adding up the volumes of these disks.

First, we need to find the equations for the curves y^2 = x and x = 2y. The first curve is already in the correct form, but the second curve can be rearranged to get y = x/2. Then, we can find the bounds of integration by finding the intersection of the two curves. These bounds are x = 0 and x = 4.

Next, we can set up the integral for the volume:

V = π ∫_0^4 (x/2)^2 dx

Evaluating this integral gives:

V = π/3 (x^3/2) evaluated from 0 to 4

V = π/3 [8/2 - 0/2]

V = π/3 (8) = 16π/3 cubic units

Hence, the volume of the solid is 16π/3 cubic units.

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Answer:

292,201,338 possible combinations powerball numbers

Step-by-step  explanation:

if your talking about altogether then 292,201,338 but if its specific you need to upload a screenshot of the options

Answer: Well there's no generic number, since the Powerball has so much numbers to choose from the ticket the variety of combinations could be infinte, but no one has time to count them all lol.

Step-by-step explanation:

I know this won't help so give the credit to the person that actually helps :)

Answer:

\(y=-\frac{3}{4}x+2\)

Step-by-step explanation:

The slope-intercept form is given by y=mx+c, where m is the slope and c is the y-intercept.

Slope of given line= \(-\frac{3}{4}\)

Parallel lines have the same slope. Thus, the slope of the line would also be \(-\frac{3}{4}\).

\(y=-\frac{3}{4}x +c\)

The value of c can be found by substituting a pair of coordinates.

When x= 4, y= -1,

\(-1=-\frac{3}{4} (4)+c\)

-1= -3 +c

Add 3 to both sides:

c= -1 +3

c= 2

Thus, the equation of the line is \(\bf{y=-\frac{3}{4}x+2\).

Additional:

Do check out the following for a similar question on slope-intercept form!

Answer:

4x=>-74

Step-by-step explanation:

x+23=>18

4(x+23)=>18

4x+92=>18

collect like terms

4x=>18-92

4x=>-74

Answer is 4 (x + 23 ) ≥ 18

Step by step

4 times the sum of a number and 23

4(x + 23)

Is at least 18

≥ 18

Your inequality

4 (x + 23 ) ≥ 18

to solve, distribute

4x + 92 ≥ 18

subtract 92 from both sides

4x + 92 - 92 ≥ 18 - 92

simplify

4x ≥ -74

divide both sides by 4 to solve for x

4/4 x ≥ -74/4

x ≥ 18.5

18.5 is equal to or greater than 18 so problem solved

** We used ≥ in this inequality which means at least (equal to) this number or greater