please help bless you !

Answer:

nice

Step-by-step explanation:

The Lewis dot structure for BF2 is:

 F     B     F

  \   /    

   B    

  /   \

 F     B     F

In this molecule, there are three atoms (one boron and two fluorine) and a total of 12 valence electrons. Boron is in group 3, so it has 3 valence electrons, while each fluorine atom has 7 valence electrons.

To form the Lewis dot structure, we first place the atoms in a linear arrangement. Each fluorine atom shares one electron with the boron atom, giving a total of two shared electrons (or one bond) between the boron and each fluorine atom. This gives us a total of four electrons (or two bonds) between the boron and the two fluorine atoms.

The remaining four electrons are placed as nonbonding electron pairs around each fluorine atom to satisfy the octet rule. Therefore, there are a total of two bonding domains and two nonbonding electron domains around the boron atom. The electron domain geometry is tetrahedral, and the molecular geometry is linear.

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Answer:

(7,5) and (10,8)

Step-by-step explanation:

x = y+2

4(y+2)^2 -(y+2) - 67y + 146 = 0

4(y^2+4+4y) -y - 2 - 67y + 146 = 0

4y^2+16y+16 - 68y + 144 = 0

4y^2 -52y + 160= 0

y^2 - 13y+40 = 0

(y-8)(y-5) = 0

y = 8

y = 5

x = 5+2 = 7

x = 8 + 2 = 10

Yes, a transformation can involve the addition, subtraction, multiplication, or division of or by a constant. In fact, these operations are commonly used in mathematical transformations.

For example, adding a constant to each value in a set of data is a common way to shift the entire set of values up or down. Multiplying each value in a set of data by a constant is a common way to stretch or shrink the data. Subtraction and division can also be used in transformations, depending on the context. However, it is important to note that not all transformations involve these operations.

Some transformations may involve more complex operations, such as exponentiation or logarithmic transformations. So, the short answer is yes, but the long answer is that it depends on the specific transformation being used.

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The total number of integral solutions of x + y + z = 12, where −3 ≤ x ≤ 4, 2 ≤ y ≤ 11, and z ≥ 3 is; 59 integer solutions

We are given the condition that;

−3 ≤ x ≤ 4

Thus, we will use x values of -3, -2, -1, 0, 1, 2, 3, 4

When;

x = -3 and y = 2, in x + y + z = 12, solving for z gives z = 13

x = -3 and y = 3,  in x + y + z = 12, solving for z gives z = 12

x = -3 and y = 4,  in x + y + z = 12, solving for z gives z =11

x = -3 and y = 5,  in x + y + z = 12, solving for z gives z = 10

x = -3 and y = 6,  in x + y + z = 12, solving for z gives z = 9

x = -3 and y = 7,  in x + y + z = 12, solving for z gives z = 8

x = -3 and y = 8,  in x + y + z = 12, solving for z gives z = 7

x = -3 and y = 9,  in x + y + z = 12, solving for z gives z = 6

x = -3 and y = 10,  in x + y + z = 12, solving for z gives z = 5

x = -3 and y = 11,  in x + y + z = 12, solving for z gives z = 4

Thus, there are 10 solutions with x =-3

Repeating the above with x = -2, we will have 10 solutions

Similarly, with x = -1, we will have 9 more solutions

Similarly, with x = 0, we will have 8 more solutions.

Similarly, with x = 1, we will have 7 more solutions.

Similarly with x = 2, we will have 6 more solutions.

Similarly with x = 3, we will have 5 more solutions.

Similarly with x = 4, we will have 4 more solutions.

Thus,

Total number of solutions = 4 + 5 + 6 + 7 + 8 + 9 + 10 + 10

= 59 integer solutions

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The purpose of the author with this excerpt is to show readers how serious is Audra's amnesia and the effects of this memory loss.

Audra Thomas is a Texan girl who lost her ability to see and remember new and old events, after she suffered a simple injury when she was in fifth grade.

In "About a Girl" the author describes the life story of Audra Thomas and his experience when interviewing Audra who is considered to have one of the most unique cases of amnesia.

As part of the interview, the interviewer asks Audra about an old picture and Audra declares she knows the picture shows a girl that was her best friend but she cannot remember her at all.

This declaration shows how serious is Audra's amnesia because it is likely Audra had spent a lot of time with the girl even before her accident and despite this, she cannot remember this girl. Also, this shows the long-lasting effects of her amnesia as it seems her memory loss increases over time.

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Answer:

27

Step-by-step explanation:

Let x be the vertical distance

sin4 = x/387

x ~= 26.995775534 = 27 (cor to nearest foot)

4 divided by 34 is equal to 0 remainder of 4/34, which can be simplified to 2/17 as a fraction.

So,

4 ÷ 34 = 0 remainder 4/34 = 2/17

What is the fraction?

A fraction is a mathematical representation of a part of a whole, where the whole is divided into equal parts. A fraction consists of two numbers, one written above the other and separated by a horizontal line, which is called the fraction bar or the vinculum.

To divide 4 by 34, we write it as a fraction with a numerator of 4 and a denominator of 1, i.e., 4/1.

To perform the division, we start by dividing the first digit of the dividend (4) by the divisor (34). Since 4 is less than 34, the quotient is 0, and the remainder is 4. We then bring down the next digit (0) to form the new dividend, which is now 40.

Next, we divide 34 into 40. The quotient is 1, and the remainder is 6. We bring down the next digit (0) and divide 34 into 60. The quotient is 1, and the remainder is 26.

Finally, we bring down the last digit (0) and divide 34 into 260. The quotient is 7, and the remainder is 2.

Therefore, 4 divided by 34 is equal to 0 remainder of 4/34, which can be simplified to 2/17 as a fraction.

So,

4 ÷ 34 = 0 remainder 4/34 = 2/17

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Answer:

2/7 is larger

Step-by-step explanation:

2/7 = 8/28

1/4 = 7/28

Answer:

2) 4/5

3) 3

Step-by-step explanation:

2) 4/8-3=4/5

3)5x-4=3x+2

2x=6

x=3

Answer:

2) 4/5

3)x=3

Step-by-step explanation:

1) 4/8-3= 4/5

2) 5x-4=3x+2

bring 3x to left side and bring -4 to right side (remember signs will be reversed that is 3x becomes -3x and -4 will be 4

5x-3x=4+2

2x=6

x=6/2

x=3

put 3 in place of x

5*3-4=3*3+2

15-4=9+2

11=11

Answer: number 2 is b,

Numiner 3 it doesn’t matter what number,the importance is that both numbers are the same,Number 4 is

Step-by-step explanation:

The predicted value of y when x = 3, based on the least-squares regression line equation y = 50 - 15x, is y = 50 - 15(3) = 5.

The given least-squares regression line equation y = 50 - 15x represents a linear relationship between the variables x and y. In this equation, the coefficient of x (-15) represents the slope of the line, and the constant term (50) represents the y-intercept.

To find the predicted value of y when x = 3, we substitute x = 3 into the equation and solve for y. Plugging in x = 3, we have y = 50 - 15(3). Simplifying this expression, we get y = 50 - 45 = 5.

Therefore, when x = 3, the predicted value of y based on the least-squares regression line is 5. This means that according to the regression line, when x is 3, the expected or estimated value of y is 5.

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To calculate the future value of an investment with compound interest, we can use the formula:

\(FV=PV(1+r)^n\)

Where:

FV is the future value

PV is the present value (initial investment)

r is the interest rate (expressed as a decimal)

n is the number of periods (in this case, five years)

Step-by-step explanation:

Substituting the given values:

PV = $13,500

r = 10% = 0.10

n = 5

FV = $13,500 * (1 + 0.10)^5

Calculating the result:

FV = $13,500 * (1.10)^5

FV= $21,741

Answer: After 5 years the CD will be worth approximately $21,741.

The statement correctly describes the relationship between △DEF and △D'E'F' is option (D) △DEF is congruent to △D′E′F′ because you can map △DEF to △D′E′F′ using a reflection across the x-axis, which is a rigid motion.

In the given figure

Consider the ΔDEF

The coordinates of the each point is

D = (0,-1)

E = (-3,-4)

F = (6, -4)

The coordinates of the △D′E′F′

D' = (0,1)

E' = (-3,4)

F' = (6,4)

Here we can see that there is a reflection across the x axis which is a rigid motion

Hence, the statement correctly describes the relationship between △DEF and △D'E'F' is option (D) △DEF is congruent to △D′E′F′ because you can map △DEF to △D′E′F′ using a reflection across the x-axis, which is a rigid motion.

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Answer:

Step-by-step explanation:

y = (1/3)x - 1

m = 1/3

Parallel lines have same slope. m = 1/3

(-6 , 4)

In y = mx + b equation, plugin the values x = -6 , y = 4 and m = 1/3

\(4 = \dfrac{1}{3}*(-6) + b\\\\\\4 = -2 + b \\\\\4 + 2 = b\\\\b = 6\)

Equation:   y = mx + b

\(y = \dfrac{1}{3}x + 6\)

The statement "If y is the solution of the initial-value problem dy dt = 2y 1 − y 5 , y(0) = 1 then lim t→[infinity] y = 5" is false.

To explain why the statement is false, we can analyze the behavior of the solution y as t approaches infinity.

Given the initial-value problem dy/dt = (2y)/(1 - y^5), y(0) = 1, we want to determine the limit of y as t approaches infinity, i.e., lim t→∞ y.

We can rewrite the differential equation as:

dy/(2y) = dt/(1 - y^5)

Integrating both sides of the equation gives:

(1/2) ln|y| = t + C

Where C is the constant of integration.

Solving for y, we have:

ln|y| = 2t + 2C

Taking the exponential of both sides:

|y| = e^(2t+2C)

Since we are interested in the limit of y as t approaches infinity, we can ignore the absolute value sign and focus on the behavior of the exponential term.

As t approaches infinity, the term e^(2t+2C) grows without bound if 2t + 2C is positive. On the other hand, if 2t + 2C is negative, the exponential term approaches zero.

Since y(0) = 1, we can substitute this value into the equation to find the value of the constant C:

ln|1| = 2(0) + 2C

0 = 2C

C = 0

So the equation becomes:

|y| = e^(2t)

Since the exponential term e^(2t) is always positive and approaches infinity as t approaches infinity, we can conclude that the limit of y as t approaches infinity is also positive infinity, i.e., lim t→∞ y = ∞.

Therefore, the statement lim t→∞ y = 5 is false. The correct statement is lim t→∞ y = ∞.

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a) The linear equation represents the charge for transporting x tons.

b) c(x) = 1.07*x

c) c(d(x)) is the tax applied to what we get with d(x).

e) The cost is $1,277.35

a) First we are given the linear function:

d(x) = 85*x + 95

This represents the fixed charge of $95 plus the $85 per ton, so that linear equation represents the charge for transporting x tons.

b) Remember that if we have a quantity A, and it increases by 7%, then just multiply it by 1.07

Then if the cost is x dollars, the cost + tax equation is:

c(x)=  1.07*x

c) Equations like:

C(d(x) ) will give us the tax + cost applied to d(x), which is what the company charges for x tons.

d) If there is no tax to the delivery fee, then the total charge equation is:

f(x) = 1.07*85*x + 95

(the 1.07 not applied to the delivery fee).

If you transport 13 tons of salt, then x = 13

f(13) =  1.07*85*13 + 95 = 1,277.35

The total cost for 13 tons of salt is $1,277.35

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A simple random sample involves taking a proportion from a population to represent the complete data set.

The books in the sample are: (b) 06 35 58 10 47

The numbers are given as:

85063 55810 10470 08029 30025

Rewrite the numbers as 2-digits as follows:

85 06 3 5 58 10 10 47 0 0 80 29 30 02 5

So, we have:

85 06 35 58 10 10 47 00 80 29 30 02 5

Remove numbers outside the range 01 - 70, the single digits and the repeated numbers

06 35 58 10 47 29 30 02

Take the first five samples

06 35 58 10 47

Hence, the books in the sample are: 06 35 58 10 47

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Answer: did you make that up ??

Step-by-step explanation:

Answer:

A. Alternate interior

B. Transitive property

C. Converse alternate interior angles theorem.

(a)i. Evaluating the constant:

\($$\int_{-1}^{1} c(1+x)(1-2x) dx = 1$$$$\implies c = \frac{3}{4}$$\)

Therefore, the probability density function is:

\($$f(x) = \frac{3}{4} (1+x)(1-2x), -1< x < 1$$\) ii. Plotting the probability density function:

From the graph, it is observed that the density function is skewed to the left.

(b)i. The mean:

\($$E(X) = \int_{-1}^{1} x f(x) dx$$$$E(X) = \int_{-1}^{1} x \frac{3}{4} (1+x)(1-2x) dx$$$$E(X) = 0$$\)

ii. The second moment about the origin:

\($$E(X^2) = \int_{-1}^{1} x^2 f(x) dx$$$$E(X^2) = \int_{-1}^{1} x^2 \frac{3}{4} (1+x)(1-2x) dx$$$$E(X^2) = \frac{1}{5}$$\)

Therefore, the variance is:

\($$\sigma^2 = E(X^2) - E(X)^2$$$$\implies \sigma^2 = \frac{1}{5}$$\)

iii. The standard deviation:

$$\sigma = \sqrt{\sigma^2} = \sqrt{\frac{1}{5}} = \frac{\sqrt{5}}{5}$$(c)

i. The cumulative distribution function:

\($$F(x) = \int_{-1}^{x} f(t) dt$$$$F(x) = \int_{-1}^{x} \frac{3}{4} (1+t)(1-2t) dt$$\)

ii. The probability density function can be obtained by differentiating the cumulative distribution function:

\($$f(x) = F'(x) = \frac{3}{4} (1+x)(1-2x)$$\)

iii. Evaluating\(P(-0.2 < X <0.2):$$P(-0.2 < X <0.2) = F(0.2) - F(-0.2)$$$$P(-0.2 < X <0.2) = \int_{-0.2}^{0.2} f(x) dx$$$$P(-0.2 < X <0.2) = \int_{-0.2}^{0.2} \frac{3}{4} (1+x)(1-2x) dx$$$$P(-0.2 < X <0.2) = 0.0576$$\)

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Therefore, In the figure, a∥b  angle m∠7 = 34° .

An angle is a figure in Euclidean geometry made up of two rays that share a vertex, or common terminus, and are referred to as the sides of the angle. Angles of two rays lie in the plane containing the rays. Angles can also result from the intersection of two planes. Dihedral angles are the name given to them.

Here,

Given that a and b are parallel lines,

∠3 and ∠7  are corresponding angles and congruent

m∠3 = 34°

thus ,m∠7 =m∠3 = 34°

so, m∠7 = 34°

Therefore, In the figure, a∥b  m∠7 = 34° .

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Answer:

100 × 100 × 20 = 200,000

Step-by-step explanation:

here pls brainliest

The correct option is Simple Linear Regression. Simple Linear Regression is NOT considered to be a Time-Series method of forecasting. The other methods are Time-Series method.

Time-Series analysis is a technique for forecasting future values based on previous observations. It includes various methods such as Moving Average, Exponential Smoothing, Seasonality Analysis, and Multiplicative/Additive Decomposition. Simple Linear Regression, on the other hand, is a method of predicting the relationship between two variables through a straight-line equation. Therefore, it is not considered to be a Time-Series method of forecasting.

A moving average is a common Time-Series method that calculates the average of a specific number of past observations to forecast future values. Exponential smoothing, another popular Time-Series method, assigns more weight to recent observations than to older ones. Seasonality analysis and multiplicative/additive decomposition are also Time-Series methods that are used to analyze trends and patterns in data over time.

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Given:

To combine these logarithms into a single logarithm, the first thing we need to do is to re-write the expression as a single logarithm with coeffient.

Next, we will use the Product Rule to simplify the numerator.

Product Rule states that:

Applying it to the numerator:

We will now have a new expression:

Next, we will factor out the logarithm.

Therefore, the final answer would be:

According to the statement the area of the second triangle is 99 square feet.

To find the area of the second triangle, we can use the fact that the ratio of the areas of similar figures is equal to the square of the ratio of their corresponding sides.
In this case, the corresponding sides of the second triangle are 3 times the length of the first triangle.

Since the area of the first triangle is given as 11 square feet, we need to find the square of the ratio 3:1.
The ratio of the corresponding sides is 3:1, so the ratio of their lengths is 3:1 as well.

Squaring this ratio, we get

(3²) : (1²)  = 9 : 1.
Now, we can use this ratio to find the area of the second triangle.

Since the area of the first triangle is 11 sq ft, we can set up the equation:
11 sq ft x (9:1) = x sq ft
Simplifying this, we get:
99 sq ft = x sq ft
Therefore, the area of the second triangle is 99 sq ft.

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The area of the second similar triangle, with corresponding sides 3 times the length of the first triangle, is 891 square feet. The area of a triangle is determined by multiplying the base by the height and dividing the result by 2.

In this case, the first triangle has an area of 11 square feet. To find the area of the second similar triangle, we need to consider that the corresponding sides are 3 times the length of the first triangle.

Let's assume the base and height of the first triangle are "b" and "h" respectively. So, the area of the first triangle can be calculated as \(\frac{bh}{2} = 11\).

Now, the corresponding sides of the second triangle are 3 times longer. This means the base and height of the second triangle will be 3b and 3h respectively. Therefore, the area of the second triangle can be calculated as \(\frac{3b\times 3h}{2}\)

Substituting the values, we get \(\frac{9b\times 9h}{2}\). Simplifying further, the area of the second triangle is 81 times the area of the first triangle, which is 891 square feet.

In conclusion, the area of the second similar triangle, with corresponding sides 3 times the length of the first triangle, is 891 square feet.

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Considering the slope of the lines, it is found that the lines going through the points are neither parallel nor perpendicular.

The slope, given by change in y divided by change in x, determines if the lines are parallel, perpendicular, or neither, as follows:

In this problem, the slopes are given as follows:

The multiplication is of 1, not -1, hence they are neither parallel nor perpendicular.

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bAnswer: the answers is most likely a because of the nomination

Step-by-step explanation: