Find all solutions to the equation b² = 13

A graph to model the proportional relationship between cost and number of songs is shown in the image attached below.

Mathematically, a proportional relationship and the constant of proportionality can be represented or modeled with the following equation or mathematical expression:

y = kx

Where:

Next, we would determine the constant of proportionality (k) for a song as follows:

Constant of proportionality (k) = y/x

Constant of proportionality (k) = 10/20

Constant of proportionality (k) = 0.2

Therefore, an equation for any number of song for this karaoke is given by:

y = 0.2x.

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Answer:

answer is c!

because it's domain is -7!!

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The measure of an inscribed angle is half the measure of the intercepted arc:

Angles a and b sum to a right angle since inscribed between the tangent and diameter.

Then we have:

Answer:

x = 3

and

y = 2

Step-by-step explanation:

The slope of the equation and y- intercept​ is 320 and 1500 respectively.

The slope is the ratio of the vertical changes to the horizontal changes between two points of the line.

Given that the total calories y burned by that person can be represented by the equation y=320x+1500, where x represents the number of hours spent walking.

To find the slope and y- intercept​.

y=320x+1500

Therefore, the slope of the line is;

m =320

Then the y- intercept is 1500

Hence, The slope of the equation and y- intercept​ is 320 and 1500 respectively.

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The percentage by which the radius of the artery reduces is 1.44% of original radius.

According to Poiseuille’s law, we got that  there is relation between radius, length, average pressure  for blood which is flowing in our body and that relation is  is given by

Q = ((P₂-P₁)πr⁴) /(8ηl)

where Q is flow rate

P is the pressure

r is the radius of the artery

η is the viscosity

Now,we have given that Flow rate is reduced by 12%,new flow rate is 88% of normal value.

Also, we have also given that pressure is increased by 22%,so new pressure is 122% of initial value,

therefore Q = ((P₂-P₁) × π × r⁴) /(8ηl)

=>(Q-12Q/100)=[((122 / 100) × P₁-P₁) × π × r₂⁴] / (8ηl)

=>(88 / 100)Q=(22 / 100)×(P₁ × π × r₂⁴)/(8ηl)

=>(88/22)Q=(P₁ × π × r₂⁴)/(8ηl)

=>[[4 × (8ηl)] × Q]/ (P₁ × π)=r₂⁴

=>4r₁ =r₂⁴

=>r₂=√2r₁

or r₂=1.44% of original radius.

Hence, by 1.44% radius of artery would reduce.

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5 radical 8 to the power of 3

Step-by-step explanation:

Check the picture below.

Answer:

11

Step-by-step explanation:

The relationship is not proportional because the number of used bottles increases more. Option B

A relationship is said to be proportional when the two variables that are in question are either increasing or decreasing at the same rate. It could also be that one one quantity is increasing and the other is  decreasing.

If we look at the proportionality in the proper sense of it, there appears to be no relationship between the two variables as the number of used bottles is increasing at a much higher rate than the number of bottles that is recycled.

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to get the slope of any straight line, we simply need two points off of it, let's use those in the picture below.

[tex](\stackrel{x_1}{-3}~,~\stackrel{y_1}{0})\qquad (\stackrel{x_2}{7}~,~\stackrel{y_2}{4}) \\\\\\ \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{4}-\stackrel{y1}{0}}}{\underset{run} {\underset{x_2}{7}-\underset{x_1}{(-3)}}} \implies \cfrac{4 }{7 +3} \implies \cfrac{ 4 }{ 10 } \implies \cfrac{2 }{ 5 }[/tex]

Answer:

a=90°

c=45°

b=45°

Step-by-step explanation:

this triangle is a right triangle. (shown by the box in angle a) this means a must equal 90°

and by extension means the other two angles have to equal 45° each because right angles always have two angles of the same degree and the angles of a triangle always Equal 180°

Answer:

Step-by-step explanation:

Planet A has a mass of 8× 10²5 kilograms. Planet B has a mass of 6×10 kilograms. Choose which planet has the larger mass. Then fill in th blank with a number written in standard notation. Planet A has the larger mass. The mass of Planet A is times as large as the mass of Planet B. O Planet B has the larger mass. $0 times as large as the mass of Planet A.

Answer:

10

Step-by-step explanation:

im him trust

When two pairs of corresponding sides and the corresponding angles between them are congruent, the triangles are congruent.

Side-Angle-Side (SAS) Rule

The proof by S A S congruence rule is given below.

Given from fig, JK || LM.

And JK = LM

Since JK is parallel to LM and JN is a transversal so the angle made on the same side of JN are corresponding angles which are equal to each other.

So, angle KJL = angle MLN........equation 1

Also given L is the midpoint of JN so, JL = NL.....equation 2

Now, in triangle JLK and triangle LNM

JK = LM (given)

angle KJL = angle MLN (from 1)

JL = NL (from 2)

So by S A S congruence rule, triangle JLK conguent triangle LNM proved.

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The probability that a randomly selected student has a typing speed of less than 38 words per minute is 15.87%.

What is normal distribution?

A probability distribution that is symmetric about the mean is the normal distribution, sometimes referred to as the Gaussian distribution. It demonstrates that data that are close to the mean occur more frequently than data that are far from the mean. The normal distribution appears as a "bell curve" on a graph.

The formula for z-score is z = (x -μ)/σ

Where,

Z is standard score.

x is observed value.

μ is mean of the sample.

σ is standard deviation of the sample.

According to the given question.

The mean of the distribution is μ = 44

The standard deviation of the distribution is σ = 6

The observed value is x = 38

Therefore, z-score = (38 -44)/6 = -1

So, the are P(z > -1) = 15.87%

Hence, the probability that a randomly selected student has a typing speed of less than 38 words per minute is 15.87%.

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The measure of each angle are mentioned below

What is angle ?

An angle is a figure in Euclidean geometry made up of two rays that share a common terminal and are referred to as the angle's sides and vertices, respectively. Angles created by two rays are in the plane where the rays are located. The meeting of two planes also creates angles. We refer to these as dihedral angles.

An angle is a figure in plane geometry that is created by two rays or lines that have a shared endpoint. The Latin word "angulus," which meaning "corner," is the source of the English term "angle." The shared terminus of two rays is known as the vertex, and the two rays are referred to as sides of an angle.

The measure of each angle is

∠a = 90°

∠b = 45°

∠c = 45°

∠d = 90°

∠e = 45°

∠f = 45° {coordinate judgment angle }

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p < 0.05, there is sufficient evidence to conclude that the machines' maker should perform a recalibration.

Given,

The test statistics formula for finding the z-score is,

z = (X - μ)/(σ/√n)

Where,

X = sample mean

μ = population mean

σ = population standard deviation

n = sample size

This z-score is used to determine the p-value. The null hypothesis is not rejected if p > α, and it is rejected if p < α.

Here,

The population mean μ = 4.00

The sample size n = 196

The sample mean X = 4.14

The standard deviation σ = 0.83

The significance level α = 0.05

So, the hypothesis is:

The null hypothesis: H0: μ = 4

The alternative hypothesis: Ha: μ ≠ 4

Thus, the test statistic value is,

z = (X - μ)/(σ/√n)

= (4.14 - 4)/(0.83/√196)

= 2.36

So, for z = 2.36, the p-value is 0.009137

Therefore,

The provided significance level of 0.05 is not met by the p-value of (0.009137). Therefore, there is enough evidence to support the claim that the machines' manufacturer needs to recalibrate them.

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The standard deviation of the sampling w would be 0.06.

What is a standard deviation?

The standard deviation in statistics is a measure of the amount of variation or dispersion in a set of values. A low standard deviation indicates that the values are close to the set's mean, whereas a high standard deviation indicates that the values are spread out over a larger range.

Population proportion

                         [tex]p=\frac{2756}{5500} \\\\\\p=0.501091\\\\p=0.501[/tex]

The mean of the sampling distribution for samples of size n=70 customers = 0.501

The standard deviation of the sampling distribution for samples of size n=70 customers is

                         [tex]=\sqrt{\frac{p* (1-P)}{n}} \\\\=\sqrt{\frac{ 501091(1-0.501091) }{2}}\\\\ = 0.059761 \\\\=0.06[/tex]

Hence, the standard deviation of the sampling w would be 0.06.

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Answer: 16

Step-by-step explanation:

u=5

v=3

u² - v²

5² - 3²
——————————

5² = 5 • 5 = 25

3² = 3 • 3 = 9

——————————

25 - 9 = 16

Answer:

Step-by-step explanation:

11.

Answer: 4in

Step-by-step explanation:

The inequality to represent the situation is 16c + 63r ≤ 640.

What is simple inequality?

Mathematical expressions with simple inequalities are those in which the two sides are not equal. Contrary to equations, we compare two values in inequality. Less than (or less than or equal to), greater than (or greater than or equal to), or not equal to signs are used in place of the equal sign.

Given, total saving = $640

Mya cooks lunch or dinner = $16

restaurant for lunch or dinner = $63

For c meals that Mya cooks = 16c

For r meals, the family eats at a restaurant = 63r

Total cost = 16c + 63r

Based on conditions, 16c + 63r ≤ 640

Hence, the inequality representing the situation is 16c + 63r ≤ 640.

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The total number of tickets they bought was 3.

What is a math riddle?

To solve a math riddle, children must translate a few sentences from a real-life scenario into the correct combination of mathematical equations. Children can decipher any code, including math riddles, using logic, creative problem-solving, and common sense.

Total 3 tickets-

Grandfather-Also Father of His son

Father-Also son of his father.

Son.

So Two fathers and two sons.

Hence, a total of 3 tickets were bought.

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Groups not counted as unemployed in the official unemployment statistics are the underemployed and discouraged workers.

A discouraged worker is someone who can work and is qualified for employment but is not already working and has not looked for work in the past four weeks. Discouraged workers typically have given up looking for work because they have discovered no relevant employment possibilities or have not been successful in getting a job after applying.

Discouragement among employees has a wide range and complex root causes. Because they lack the skills to deal with technological change at work, workers occasionally leave the workforce. During the Great Recession, the manufacturing industry let go of senior workers who were unable to operate the modern computer numeric control (CNC) equipment, which was used to cut wood and other hard materials.

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Answer:

Step-by-step explanation:

B.

An inequality that can be used to find t the amount of money in dollars is

c)t ≤ 350, t is less than or equal to 350. So, correct option is c.

In science, a disparity or an inequality is a connection which makes a non-equivalent examination between two numbers or other numerical expressions. It is utilized generally normal to look at two numbers on the number line by their size. There are a few unique documentations used to address various types of disparities:

The documentation a < b implies that an is not as much as b.

The documentation a > b implies that an is more noteworthy than b.

Regardless, an isn't equivalent to b. These relations are known as severe inequalities, implying that an is completely not exactly or rigorously more prominent than b. Identicalness is barred.

We have Alex total amount =$600 and amount which he want on his account after spending is $250.

So,t+250 ≤600

=>t≤ 600-250

=>t≤ 350.

Hence, option c is correct.

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(Complete question) is:

Alexandra has $600 in her checking account. She wants to spend part of this money on a computer. She wants to have at least $250 left in her checking account after buying the computer. The inequality shown can be used to find t, the amount of money in dollars that Alexandra can spend on the computer.

Which inequality represents all possible values of t?

a)t ≥ 350,

t is greater than or equal to 350

b)t ≤ 850,

t is less than or equal to 850

c)t ≤ 350,

t is less than or equal to 350

d)t ≥850,

t is greater than or equal to 850

Yes, it is worth the extra drive, going to the further store is cheaper.

The cheaper option saves you $0.09.

Given:

Price or sale = $3.19 a pound

1.) Neighborhood store

Distance = 2.1 miles away

As, the car averages about 19 miles per gallon,

=2.1 miles / (19 miles/gallon)

= 0.1105 gallons of gas < 17 gallons

The gas is about $3.83/gallon, then the cost be

=0.1105 gallons x ($3.83/gallon)

= $0.42

The chicken is sold for $3.59 a pound, and you need 3 pounds, then you would pay:

= 3 pounds x ($3.59/pound)

= $10.77

So, the total is

= $0.42 (gas) + $10.77 (chiken)

= $11.19

2.) Store across town

Distance = 8.5 miles away

The car averages about 19 miles per gallon, then you would need:

=8.5 miles / (19 miles/gallon)

= 0.447 gallons of gas < 17 gallons

The gas is about $3.83/gallon, then the gas would cost:

=0.447 gallons x ($3.83/gallon)

= $1.71

The chicken is sold for $3.19 a pound, and you need 3 pounds, then you would pay:

= 3 pounds x ($3.19/pound)

= $9.57

The total cost

= $1.71 (gas) + $9.57

= $11.28

Thus, $11.19 < $11.28, then it is worth the extra drive.

Hence, cheaper option saves you= $11.28 - $11.19 = $0.09

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The margin of error does not take into account the bias caused by nonresponse.

What is nonresponse bias?

The phenomenon known as participation bias, also known as non-response bias, occurs when a disproportionate number of participants have certain characteristics that have an impact on the results of surveys, polls, and other types of research.

Nonresponse bias happens when a portion of the sample's respondents fail to respond. The main distinction in this instance is that the error arises from a lack of respondents rather than the collection of false data.

Usually, the number of responses is used to calculate the margin of error. You can treat a sample from a finite population as infinite if the sampling fraction is small, but if the sampling fraction is high (say, more than 10% of the population size), you must make a finite population correction.

So, the non-response bias is not taken into account by the margin of error.

Longer commuters might take less time to complete a survey.

This would result in our estimate from the sample being lower than the actual mean travel time to work.

Hence, the margin of error does not take into account the bias caused by nonresponse.

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