3х + 5 - 13x = 25 need

Answer:

r =13

Step-by-step explanation:

on the picture

If it's helpful ❤❤

THANK YOU.

Answer:

option B: 15\(x^8 y^5 z^7\)

Step-by-step explanation:

we just calculate 5 x^4 y^2 z^2 multiplied by 3x^4 y^3 z^5

and that gives the answer

The regression equation is Y = 95.0 + 0.84X.The regression line is a mathematical model that is used to predict the value of a dependent variable (Y) based on the value of an independent variable (X).

In this case, the regression line is used to predict Y from X using the following data: X = 10, 20, 30, 40, 50, 60 and Y = 111, 109, 110, 94, 92, 93. By using a regression analysis tool such as StatKey, we can calculate the regression equation that best fits this data. The regression equation is Y = 95.0 + 0.84X, where 95.0 is the intercept and 0.84 is the slope. This equation can be used to make predictions about the value of Y for a given value of X. The rounded answer for the intercept is 95.0 and the rounded answer for the slope is 0.84.

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Answer:

Infinitely many solutions.

Step-by-step explanation:

4(4x+3)=19x+9-3x+3

16x + 12 = 16x + 12

0 = 0, so it doesn't matter what x is.

Answer:

Hello, there!!!

The answer is option D.

but you can also write 45 by rounding off, alright.

Hope it helps...

hello

now we know that this is a vertical triangle.

if C = 90° and B = 12°

90+12 = 102 180-102=78.

so A = 78°

now look at the A. A is looking to the CB.

so we can set up an equal.

A is 44

and

B is ?

if 78 is 44

12 is x 12×44÷78= 6.7692..

right now

AC = 6.7692

BC is = 44

this is a vertical triangle thats why the verticals angle's lookings (AB) square, should be the others lookings squares sum.

6.7692^2 = 45.2875..

44^2 = 1936

1936+45.2875= 1981.2875

now im taking 1981.2875 into the square root to find AB.

✓1981.2875 = 44.5

there were many numbers after the 1981 thats why it will probably 44.9

good luckk

The product of a, b and c is equal to 18.

In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.

Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.

Given is are the expression as -

\($\frac{\sqrt[4]{81x^{4} y^{2} } }{x^{-1} 2y^{-1} }\)

The given expression is -

\($\frac{\sqrt[4]{81x^{4} y^{2} } }{x^{-1} 2y^{-1} }\)

We can rewrite it as -

\($\frac{(81x^{4} y^{2}) ^{\frac{1}{4} } }{x^{-1} (2y)^{-1} } = \frac{(3^{4} x^{4} y^{2})^{\frac{1}{4} } }{x^{-1} (2y)^{-1} } = 6xy^{\frac{1}{2} } xy\)

Now, we can write -

\(6xy^{\frac{1}{2} } xy = 6x^{2} y^{(\frac{1}{2} + 1) } = 6x^{2} y^{(\frac{3}{2}) }\)

On comparing, we get -

a = 6

b = 2

c = 3/2

So -

a x b x c = 6 x 2 x 3/2 = 18

a x b x c = 18

Therefore, the product of a, b and c is equal to 18.

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Answer:

Sin A = 8/10 or 4/5

Cos A = 6/10 or 3/5

Tan A = 8/6 or 4/3

Answer:

79 boxes

Step-by-step explanation:

1500-155= 1345

1345/17=79.11

Answer:

14

Step-by-step explanation:

you clean 2 a hour so 7*2=14

Answer:

14 houses

Step-by-step explanation:

Answer: (6, 3)

Step-by-step explanation:

Let A be the event that a family chose at random indicated an intention to buy a new car and let B be the event that a family chose at random bought a new car within 3 months.

We are asked to find P(A'), which is the probability that a family chosen at random had not previously indicated an intention to buy a car.

We can use the given information to write the following conditional probabilities:

P(B | A) = 60%

P(B | A') = 10%

P(A) = 26%

We can use these probabilities to apply Bayes' theorem to find P(A' | B), which is:

P(A' | B) = P(B | A') * P(A') / P(B)

Substituting the values from the problem, we have:

P(A' | B) = (10%) * (100% - 26%) / (60% * 26% + 10% * (100% - 26%))

= (10%) * (74%) / (60% * 26% + 10% * 74%)

= (10%) * (74%) / (15.4% + 7.4%)

= (10%) * (74%) / (22.8%)

= 43.86%

Therefore, the probability that a family chosen at random had not previously indicated an intention to buy a car is 43.86%.

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Based on the information, we can infer that the range is an adequate indicator to affirm that the price difference of the Big Mac in different countries is minimal.

To find the range of the given data we must perform the following procedure:

We must find the highest and lowest data, in this case the highest and lowest data are 6.8 and 1.98 respectively. So, to find the range we must find the difference between these two data:

6.8 - 1.89 = 4.91

To find the variance we must apply the following formula:

S² = 1 / 11 - 1 ( 205.59 - (44.67)²/11)

S² = 2.42

To find the standard deviation we must apply the following formula:

S = \(\sqrt[n]{variance}\)

S = \(\sqrt{2.42}\)

S = 1.56

Based on the above data, we can infer that the range is an indicator that the difference in the Big Mac price in different countries is minimal.

Note: This question is incomplete. Here is the complete information:

Attached image

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Answer: 30%

Step-by-step explanation:
12/40 = 3/10 = 0.30

0.30*100 = 30%

\(\cfrac{2y}{3}-\cfrac{3}{4}=\cfrac{1}{12}\implies \stackrel{\textit{multiplying both sides by }\stackrel{LCD}{12}}{12\left( \cfrac{2y}{3}-\cfrac{3}{4} \right)=12\left( \cfrac{1}{12} \right)}\implies 8y-9=1 \\\\\\ 8y=10\implies y=\cfrac{10}{8}\implies y=\cfrac{5}{4}\)

Answer:

y=-4x+36

Step-by-step explanation:

y=mx+b

m is slope or rate; so m = -4

y=-4x + b

10=(-4×4) + b

36 = b

y=-4x+36

Answer:

cvvvvvvvvvvvvvvgfjgf

Step-by-step explanation:

cxvvvvvvvvvvvvvv

The 500 sample size and 95% confidence level will both tend to increase the width of the confidence interval.

In this question, we have been given  the combinations of sample size and confidence level.

We need to select a combinations of sample size and confidence level that will give the widest interval.

We know that the confidence level is typically set in the range of 99% to 80%. The 95% confidence interval will be wider than the 90% interval and which will be wider than the 80% interval.

As we know increasing the confidence will increase the margin of error which results in a wider interval.

But increasing the sample size decreases the width of confidence intervals, as it decreases the standard error.

This means, for the widest interval we need to select a high confidence interval and small sample size.

Therefore, the sample size = 500 and the confidence interval = 95% will give the widest interval.

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This question is incomplete, the complete question is;

Calculate the correlation coefficient, r, for the data below.

X = -10  -8  -1  -4  -6  -7  -5  -3  -2  -9

Y = -15  -13  4  -4  -7  -11  -6  -2  1  -13

Answer: the correlation coefficient, r, for the data is 0.9896

Step-by-step explanation:

Given the data in the question;

correlation coefficient r = ?

we know that, C_Coeff is;

r = [ (Zn(∑xy) - (∑x)(∑y) ] / [ √[( n∑x² - (∑x)²) ( n∑y² - (∑y)²)] ]

so ;

       X        Y        X²        Y²        XY

     -10     -15       100      225      150

     -8      -13        64       169       104

     -1         4          1        16           -4

     -4       -4         16       16           16

     -6       -7         36      49          42

     -7       -11         49      121         77

     -5       -6         25      36         30

     -3       -2          9         4            6

     -2       1            4         1            -2

     -9      -13         81       169         117

∑   -55     -66      385     806        536

now we substitute our values into the formula

r = [ (10×536 - (-55)(-66) ] / [ √[( 10×385 - (-55)²) ( 10×806 - (-66)²)] ]

r = 1730 / √( 825 × 3704 )

r = 1730 / √3055800

r = 1730 / 1748.0846

r = 0.9896

Therefore the correlation coefficient, r, for the data is 0.9896

Answer:

She needs to invest $13,636.36 right now

Step-by-step explanation:

This is a simple interest problem.

The simple interest formula is given by:

\(E = P*I*t\)

In which E is the amount of interest earned, P is the principal(the initial amount of money), I is the interest rate(yearly, as a decimal) and t is the time.

After t years, the total amount of money is:

\(T = E + P\)

In this question:

In 15 years, so \(t = 15\)

She wants to have $30,000, so \(T = 30000\)

8% interest, so \(I = 0.08\)

We have to find P.

\(T = E + P\)

\(30000 = E + P\)

\(E = 30000 - P\)

Replacing:

\(E = P*I*t\)

\(30000 - P = P*0.08*15\)

\(30000 - P = 1.2P\)

\(2.2P = 30000\)

\(P = \frac{30000}{2.2}\)

\(P = 13636.36\)

She needs to invest $13,636.36 right now

The area of the square with a side length of 3.1 meters is 9.61 square meters.

To find the area of a square, we need to multiply the length of one side by itself. In this case, the square has a side length of 3.1 m.

Area of a square = side length × side length

Substituting the given side length into the formula:

Area = 3.1 m × 3.1 m

To perform the calculation:

Area = 9.61 m²

It's worth noting that when calculating the area, we are working with squared units. In this case, the side length is in meters, so the area is expressed in square meters (m²). The area represents the amount of space enclosed within the square.

Remember, to find the area of any square, you simply need to multiply the length of one side by itself.

The area of the square with a side length of 3.1 meters is 9.61 square meters.

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The r-value that represents the no or low correlation is 0.0

For a r value to show no correlation, then the r value must be 0 or close to 0

Since the r values are not given, then we can assume that the r value is 0

Hence, the r-value that represents the no or low correlation is 0.0

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x = 301/56

Algebra is the branch of mathematics that deals with numbers and values which are represented with letters and symbols.

Sometimes, we do not want to mention a particular number, we can represent the number by a letter or a suitable symbol. This approach is algebraic.

For example, d + d = 2d

This is an example of an algebraic expression

Given the algebraic expression,

\(3\frac{1}{8} \div (x - 4 \frac{7}{28} ) = \frac{17}{18} + 1 \frac{5}{6} \)

Step 1:

Simplify the expression by converting the mixed numbers into improper fractions:

25/8 ÷ ( x - 119/28) = 17/18 + 11/6

Step 2: Simplify the right side of the equation

25/8 ÷( x - 119/28) = 17/18 + 33/18

25/8 ÷( x - 119/28) = 50/18

Step 3: Multiply both sides of the equation by (x - 119/28)

25/8 = 50/18 × (x - 119/28)

Step 4: Multiply both sides of the equation by (18/50)

25/8 × (18/50) = (x - 119/28)

Step 5: Simplify the left side of the equation

9/8 = (x - 119/28)

Step 6: Add 119/28 to both sides of the equation

9/8 + 119/28 = x

Step 7: Calculate the value of x:

x = 9/8 + 119/28

= 63/56 + 238/56

= 301/56

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Answer:

Step 1

Step-by-step explanation:

Yessenia should have distributed 3 to (x+4) as her first step.

her steps should have been as follows:

x+6+3(x+4)

x+6+3x+12

re write: x+3x+6+12

4x+18

The true statement is "To square a number, multiply the number by itself" which is the third option.

Remember that we define a square number as a number that is equal to the product of an integer by itself.

So, A*A = B

if A is an integer number, then B is a square number, such that:

√B = √(A*A) = A

Then the true statement is:

"To square a number, multiply the number by itself"

This means that to square A, you will write:

A*A

As we did above.

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Answer:

Step-by-step explanation:

a) The formula for the regression function is:

Maintenance Cost = 54.7757 + 120.689 x Age of Car

b) The slope of the regression equation is 120.689. This means that on average, for every one year increase in the age of a car, the maintenance cost is expected to increase by $120.689.

c) To construct a 95% interval to predict the maintenance cost for a car that is 7 years old, we can use the formula:

Y = a + bX ± tα/2 * SE

where Y is the predicted maintenance cost, a is the intercept, b is the slope, X is the age of the car, tα/2 is the t-value for the 95% confidence level with n-2 degrees of freedom (11 in this case), and SE is the standard error of the estimate.

Plugging in the values, we get:

Y = 54.7757 + 120.689 * 7 ± 2.201 * 11.8442

Y = 923.167 ± 26.010

Therefore, we can be 95% confident that the maintenance cost for a car that is 7 years old will be between $897.16 and $949.17.

d) The null hypothesis is that there is no significant linear relationship between the average maintenance cost and the age of a car in years. The alternative hypothesis is that there is a significant linear relationship between the average maintenance cost and the age of a car in years.

To test the hypothesis, we can perform a t-test on the slope coefficient using the t-statistic and the p-value provided in the output. The t-statistic is 10.1898, which is much greater than the critical t-value at the 0.05 level of significance for a two-tailed test with 11 degrees of freedom (2.201). The p-value is 0.0000, which is less than the significance level of 0.05. Therefore, we can reject the null hypothesis and conclude that there is a significant linear relationship between the maintenance cost and the age of the car in years.

Answer:

\({:}\longrightarrow\)\(\sf 5x-2=x+8 \)

\({:}\longrightarrow\)\(\sf 5x-x=8+2 \)

\({:}\longrightarrow\)\(\sf 4x=10 \)

\({:}\longrightarrow\)\(\sf x={\dfrac {10}{4}}\)

\({:}\longrightarrow\)\(\sf x={\dfrac {5}{2}}\)

\({:}\longrightarrow\)\(\sf x=2.5 \)

The absolute error and the relative error is (B) Absolute, 11; Relative 3.8%

From the information, Ella Fitzgerald had predicted that 300 people would indicate that they would be likely to buy the product between the present time and next year.

True value = 127 + 162 = 289

Absolute error = 300 - 289 = 11

Relative error = (300 - 289) / 289 × 100

= 3.8%

Therefore, the correct option is B

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The Expanded form of 3×1=3 is 3

The Expanded form of 250 is 200+50+0

Expanded form is nothing more than a method for rewriting a number such that the digit values are included. A place value exists for each number. It calculates that digit's value based on where it is in the number. As we move from left to right in a number, a digit's value rises. In comparison to the digits on the right, the ones on the left have a lower place value. The position of the number is used to calculate each number's value. We can comprehend the place value notations if we read them from right to left.

250=200(hundreds place)+50(tens place)+0(ones place)

Therefore, the Expanded form of 250 is 200+50+0.

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Answer:

ANSWER 5.3 miles

See IMAGE FOR SOLUTION

\(\textit{surface area of a cylinder}\\\\ SA=2\pi r(h+r)~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ h=6\\ r=8 \end{cases}\implies SA=2\pi (8)(6+8) \\\\\\ SA=16\pi (14)\implies SA=224\pi \implies SA\approx 703.72~units^2\)