PIZ HEIP its geometry
You are installing the same carpet in a bedroom and den. The floors of
the rooms are similar rectangles. The carpet for the bedroom costs $225. Carpet is sold by the square foot. It costs ___ dollars to carpet the den.

Answer: No, it is not a direct proportion equation

Explanation:

Direct proportions are always in the form \(y = kx\) where k is any nonzero real number. So for example, we could have the equation \(y = 9x\). The y intercept of any direct proportion is always zero. Visually, such equations will go through the origin.

Something like \(y = \frac{2}{3}x-7\) has a y intercept of -7 and it doesn't fit the form \(y = kx\), so it's not a direct proportion equation.

Yes, based on the sample data and the hypothesis test, there is evidence to suggest that the average life of StartUp's new mobile battery model is different from 600 minutes.

In order to test the claim made by StartUp's advertisement regarding the average life of their new mobile battery model, the R&D department of MoreLife conducted tests on 10 batteries under standard operating conditions. The recorded lifetimes (in minutes) were as follows: 630, 620, 650, 620, 600, 590, 640, 590, 580, and 630.

To test the claim, we need to perform a hypothesis test. The null hypothesis (H0) is that the average life of the new model is 600 minutes, while the alternative hypothesis (Ha) is that the average life is different from 600 minutes.

Using a significance level of 0.05, we will perform a t-test. First, we calculate the sample mean, which is the sum of the lifetimes divided by the sample size: (630 + 620 + 650 + 620 + 600 + 590 + 640 + 590 + 580 + 630) / 10 = 615.

Next, we calculate the sample variance: sum of [(lifetime - sample mean)^2] / (sample size - 1) = 561.11.

The test statistic is given by: t = (sample mean - hypothesized mean) / (sample standard deviation / sqrt(sample size)).

Using the formulas, we calculate the test statistic to be t = (615 - 600) / (sqrt(561.11) / sqrt(10)) = 2.632.

Finally, we compare the test statistic with the critical value from the t-distribution table. Since the test statistic (2.632) is greater than the critical value, we reject the null hypothesis.

Therefore, based on the sample data, there is evidence to suggest that the average life of StartUp's new mobile battery model is different from 600 minutes.

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Answer:

5x - 4

Step-by-step explanation:

4x - 2 + x - 2

simplify

5x - 4

hope this helps <3

The answer is D. (-160)÷8

The answer can t be a decimal therefore a and c are out. The answer has to be negative bc it was a lost. Therefore since -160 was a loss it has to be negative

Answer:

D

Step-by-step explanation:

Loss = -160

Shared between 8 owners.

So, (-160) ÷ 8

Answer: 225 cm^3

Step-by-step explanation:

Volume = Length * Width *Height

Volume= 5cm*5cm*9cm

Volume= 225 cm^3

Answer: 225 cm

Step-by-step explanation:

Length x width x height

5x5x9

5x5 = 25

25x9 = 225

Answer 225

The probability of guessing at least 11 out of 15 questions correctly is 0.059.

The probability of guessing any one question correctly is 1/2, and the probability of guessing any one question incorrectly is also 1/2.

Since each question is an independent trial with only two possible outcomes, this situation can be modeled using a binomial distribution with n = 15 (the number of trials) and p = 1/2 (the probability of success on each trial).

To find the probability of guessing at least 11 out of 15 correctly, we need to calculate the probability of guessing 11, 12, 13, 14, or 15 questions correctly, and then add these probabilities together.

Using the binomial probability formula, we can calculate the probability of guessing exactly k questions correctly as:

P(X = k) = (nCk) * p^k * (1-p)^(n-k)

where nCk is the binomial coefficient, which represents the number of ways to choose k items from a set of n items.

For k = 11, we get:

P(X = 11) = (15C 11) * (1/2)¹¹ * (1/2)¹⁵⁻¹¹ = 0.042

For k = 12, we get:

P(X = 12) = (15 C 12) * (1/2)¹² * (1/2)¹⁵⁻¹²= 0.014

For k = 13, we get:

P(X = 13) = (15 C 13) * (1/2)¹³ * (1/2)¹⁵⁻¹³ = 0.003

For k = 14, we get:

P(X = 14) = (15C14) * (1/2)¹⁴ * (1/2)¹⁵⁻¹⁴ = 0.000

For k = 15, we get:

P(X = 15) = (15C15) * (1/2)¹⁵ * (1/2)¹⁵⁻¹⁵= 0.000

To find the probability of guessing at least 11 out of 15 correctly, we add these probabilities together:

P(guessing at least 11 out of 15 correctly) = P(X >= 11) = P(X = 11) + P(X = 12) + P(X = 13) + P(X = 14) + P(X = 15) = 0.059

Therefore, the probability of guessing at least 11 out of 15 questions correctly is 0.059.

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The equation in its standard form is 4x - 5y = -6

From the question, we have the equation to be

y+2=4/5 (x+4)

Start by multiplying both sides of the equation by 5

So, we have

5(y + 2) =4/5 (x+4) * 5

Evaluate the products

This gives

5y + 10 =4 (x+4)

Next, we open the brackets

So, we have the following representation

5y + 10 =4x + 16

Collect the like terms

4x - 5y = 10 - 16

Evaluate the like terms

This gives

4x - 5y = -6

Hence, the standard form of the equation is 4x - 5y = -6

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Answer:

8640

Step-by-step explanation:

Take 2.4 hours, And 1 hour is 60 minutes, and 1 minute has 60 seconds, so 1 hour has 3600 seconds, Do one more hour and you have 7200 seconds, Now you need to add another .4 hours, .4 hours is equal to 40 minutes, so how many seconds are in 40 minutes? 1440 seconds are in 40 minutes, so add 7200 and 1440 and you get 8640.

Answer:

The person above is correct. the answer is D. I, III, II

Step-by-step explanation:

I just did the test and it was right

The corresponding angles formed by two parallel lines having the same  transversal are congruent.

The correct order of the statements are:

III m∠VQT + m∠ZRS = 180°

II m∠SQV + m∠VQT = m∠VQT + m∠ZRS

I m∠SQV + m∠VQT - m∠VQT = m∠VQT  m∠ZRS - m∠VQT

The two column proof is presented as follows;

Statements                                                           Reason

Segments UV is parallel to segment WZ            Given

Points S, Q, R, and T all lie on the same line       Given

m∠SQT = 180°                                                        Definition of a straight                                      

                                                                                angle

m∠SQV + m∠VQT = m∠SQT                                 Angle Addition Postulate

m∠SQV + m∠VQT = 180°                             Substitution Property of                       Equality

III m∠VQT + m∠ZRS = 180°                          Same-side interior angle theorem

II m∠SQV + m∠VQT = m∠VQT + m∠ZRS    Substitution Property of Equality

I m∠SQV + m∠VQT - m∠VQT = m∠VQT

+ m∠ZRS - m∠VQT                                       Subtraction Property of Equality

m∠SQV = m∠ZRS                                      

m∠SQV ≅ m∠ZRS                                        Definition of Congruency

Therefore, the correct order;

First

III m∠VQT + m∠ZRS = 180°,

Given that m∠VQT and  m∠ZRS are same side interior angles

Second; II m∠SQV + m∠VQT = m∠VQT + m∠ZRS,  

By Substitution Property of Equality given that both (m∠SQV + m∠VQT), (m∠VQT + m∠ZRS) are equal to 180°

Third; I m∠SQV + m∠VQT - m∠VQT = m∠VQT  m∠ZRS - m∠VQT,

The same value - m∠VQT is subtracted from both sides of the equation in Step II, therefore, both sides of the equation remains equal.

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Answer:

-34°F

Step-by-step explanation:

-27 - 7 = -34

or

27 + 7 = 34 = -34

I hope this helps! have a wonderful rest of ur day :)

Answer:

5

Step-by-step explanation:

slope= rise/run

=y2-y1/x2-x1

Take any two points

80-40/8-0

40/8

=5

Hi

\(\sqrt{(x+7)\)   -1 = X

Let's square the whole thing  

so we have :    x+7 +1 = x²

                         x² +x+7 +1 = 0

                         x²+x+8 = 0

no easy way to see a common factor so, let 's resolve by using discriminate.  

Δ = 1-4*1*8

Δ = 1 -32

Δ = -31

as Δ  ≤ 0 , there is no Real answer to your equation  

however , if you need we can find imaginary solutions. Just ask in commentaries

Answer:

its 2

Step-by-step explanation:

Answer:

9+42

Step-by-step explanation:

Simplfy it

− (−9) + 7 (6)

Multiply the numbers − (-9)+7g(6)

Answer:

3 or 4

Step-by-step explanation:

Answer: its 3 exactly

Step-by-step explanation:

Answer:

0.42, 0.24, 0.204, 0.04, 0.024

Step-by-step explanation:

Answer:

$15,360

Step-by-step explanation:

To find the retail price, multiply 12,800 by 1.2

12,800(1.2)

= 15,360

So, the retail price is $15,360

Answer:

$15360

Step-by-step explanation:

10% of 12,800 = 1280

20% = 1280 x 2 = 2560

Add this on to the original price to give $15,360

x - 12 = 18 is the the equation that represents ."Twelve less than a number, ×, is 18."

given the number is x

the equation of the given statement

x - 12 = 18

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The steps show how to use the distributive property to evaluate 7 88 is B. 7(88) = 7(90 - 2) = 7.90 -7.2 = 630 - 14 = 616

The correct steps to use the distributive property to evaluate 7 * 88 are:

A. 7(88) = 7(90 - 2) = 7 * 90 - 7 * 2 = 630 - 14 = 616

Therefore, option B is the correct set of steps:

7(88) = 7(90 - 2) = 7 * 90 - 7 * 2 = 630 - 14 = 616

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Answer:

0.01086956521

Step-by-step explanation:

1.4 / 128.8 = 0.01086956521

Answer:

27,150

Step-by-step explanation:

PLEASE GIVE BRAINLIEST AND THANKS

Answer: 27, 150

Step-by-step explanation:

just round it...?

(a)The class width = 3

(b) The class midpoint of the first class = 51

(c) The class boundaries of the first class =  (49.5, 52.5)

Consider the frequency distribution in the following image.

We know that in  frequency distribution the class width is nothing but the distance between the lower limits of consecutive classes.

Whereas the range is the difference between the maximum and minimum data entries.

The smallest number is 50, and the largest is 62.

So the range is 62 - 50 = 12

We know that the formula for the class width:

Class width= upper limit – lower limit +1

So, the class width = 52 - 50 + 1

                               = 3

The formula for the midpoint of each class:

midpoint = (lower limit of class + upper limit of class)/2

Let us assume that m be the midpoint of the first class.

Using above formula of midpoint:

m = (50 + 52)/2

m = 51

We know that the class boundaries are nothing but the end points of an open interval which contains the class interval.

So, the class boundaries of the first class = (49.5, 52.5)

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The expression equivalent to the given expression is \(\frac{4}{x-9}\)

This are expressions written as a ratio of two expressions. Given the rational expression

\(f(x) = \frac{4(x-2)}{(x-2)(x-9)}\)

Since (x-2) is common in both numerator and denominator, they wil cancel out to have the function below;

\(f(x) = \frac{4(x-2)}{(x-2)(x-9)}=\frac{4}{x-9}\)

Hence the expression equivalent to the given expression is \(\frac{4}{x-9}\)

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Your answer: B) Statistically significant and quite small MPG prediction errors
This statement best describes the regression, as it indicates that the relationship between the variables is statistically significant.

Without specific data or statistical analysis, it is impossible to accurately determine which statement best describes the regression for y = highway miles per gallon in 91 cars. However, in general, a statistically significant regression means that there is a relationship between the variables being analyzed. The error in predictions refers to the difference between the predicted value and the actual value.

Therefore, A) statistically significant but large error in the MPG predictions and B) statistically significant and quite small MPG prediction errors could both be possible outcomes depending on the specific data and analysis. C) Not quite significant, but predictions should be very good is unlikely to be a valid statement if the regression is not statistically significant.
Additionally, the small MPG prediction errors suggest that the regression model is reliable and accurate in making predictions for highway miles per gallon in the 91 cars.

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Answer:

(3,-5)

Step-by-step explanation:

4+1=5 put it on negative side makes it -5.

Polynomials are  closed under the operations of addition, subtraction, and multiplication, polynomials constitute a system similar to that of integers.

Polynomial exponents are whole numbers.

The fact that addition is closed for the whole numbers ensures that the resultant exponents will also be whole numbers. Polynomials are hence closed under addition.

Polynomials will be closed under an operation if the operation produces another polynomial.

If we subtract 2 polynomials, the result is a polynomial. Therefore, they are also closed under subtraction.

Polynomials are an algebraic equation that has more than two terms, particularly the accumulation of numerous phrases that each include a different power of the same variable (s).

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Answer:

Where is the image?

Step-by-step explanation:

If it's 180 it should be halfway rotated

If it's 360 it should be completely rotated which means its back to where it started

If its 270 then it's close to being fully rotated

If its 90 then you just rotated it once which means that it was barely rotated.

Hope this helped a little, just lemme know when you put the image so I can help!

Have a supercalifragilisitcexpialidocious day!

The  best describes the transformation of the given statement is the transformation was a 90° rotation about the origin.

A transformation is a function f, usually with some geometrical underpinning, that maps a set X to itself, i.e. f: X → X. The curve representing the graph either "moves to left/right/up/down" or "it expands or compresses" or "it reflects"

Given:

The given statement about the transformation.

According to given question we have

A transformation is a general term for four specific ways to manipulate the shape and/or position of a point, a line, or geometric figure. The original shape of the object is called the Pre-Image and the final shape and position of the object is the Image under the transformation.

The rule for a rotation by 90° about the origin is (x,y)→(−y,x) .

Ex- Let A(2,3) ⇒A(2,-3)

Therefore, the  best describes the transformation of the given statement is the transformation was a 90° rotation about the origin.

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Answer:

c

Step-by-step explanation:

Answer:     0.26666667 (0.3)

Answer:

ether:

y= 1/3 = 0.333

OR

y= 3/2 = 1.500