Translate the phrase into a variable expression. Use the letter b to name the variable. If necessary, use the asterisk ( * ) for multiplication and the slash ( / ) for division. ... The number of books in the library minus the 60 checked out

According to its Lewis structure, the sulfur dioxide (SO2) molecule forms 0 single bonds, 2 double bonds, has 0 triple bonds, and 1 lone pair of electrons on the central (sulfur) atom.

The Lewis structure of sulfur dioxide (SO2) can be represented as :

:O=S=O:

Here, sulfur is the central atom. It forms one double bond with each oxygen atom. There are no single or triple bonds present, and the sulfur atom has one lone pair of electrons.

Therefore, the correct count of single bonds, double bonds, triple bonds and unshared pairs of electrons on the central atom, in that order, is - 0, 2, 0, 1

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In the Lewis structure for SO2, or sulfur dioxide, there are zero single bonds, two double bonds, zero triple bonds, and one unshared pair of electrons on the central sulfur atom. The correct sequence for SO2 is therefore 0, 2, 0, 1.

SO2, or sulfur dioxide, consists of a central sulfur atom with oxygen atoms on both sides. The Lewis structure for SO2 includes one lone electron pair and double bonds with the two oxygen atoms. To calculate this, we first count the valence electrons from the atoms: sulfur has 6 valence electrons and each oxygen atom has 6 as well, for a total of 18 valence electrons.

To start the Lewis structure, we place the least electronegative atom - sulfur - in the center and the two oxygen atoms on each side. We then place a single bond between the sulfur and each oxygen. This accounts for four valence electrons (2 from each bond), leaving us with 14 more. Next, we distribute the remaining electrons to the oxygen atoms as lone pairs, as necessary, to satisfy the octet rule. If there are still electrons left over, we create double bonds until we have used all of the electrons. Here, it results in double bonds between sulfur and each oxygen atom with one lone pair on the sulfur.

Given these steps, for SO2, we have 0 single bonds, 2 double bonds, 0 triple bonds, and 1 unshared pair of electrons on the central atom, sulphur. So the correct option would be 0, 2, 0, 1.

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[tex]\frac{82}{450}\cdot100\%=\frac{164}{9}\%=18\frac{2}{9}\%[/tex]

Answer: No; they do not have congruent corresponding angles.

Answer:

y = -3

x = -2

Step-by-step explanation:

2x - y = 17

y = x - 10

Adding these 2 equations:-

2x + y - y = 17 + x - 10

2x = x + 7

x = 7  

Now substitute for x  in the first equation:-

2(7)  - y = 17

14 - 17 = y

y = -3   (answer)

Last equation:-

x + 3y = 16

4x - 5y = -38

Now multiply first equation by 5 and the second by 3:-

5x + 15y = 80

12x - 15y = -114   Adding:-

17x = -34

x = -2  (answer)

Answer:

Any ordered pairs which have a slope of 5/4.

Step-by-step explanation:

The line has a slope of -4/5 which means the y values have a difference of -4 and the x values have a difference of 5. If the line is perpendicular to this line then its slope must be the negative reciprocal which is 5/4. Any points which have a difference in y values of 5 and a difference of x values of 4 will be on some line perpendicular to the original.

Answer: 12 inches

Step-by-step explanation: First you add multiply then subctrtrac.t

The size of the squares cut from each corner of the cardboard is 3 inches to create an open box with a bottom area of 60 square inches.

We need to compute the size of the squares cut from each corner of the cardboard to create an open box with a bottom area of 60 square inches. We begin with a rectangular piece of cardboard measuring 12 inches by 16 inches.

Let x be the length of the sides of the squares that are removed. When the squares are cut out and the sides are folded up, the new dimensions of the bottom of the box will be (12 - 2x) inches by (16 - 2x) inches. Thus the area of the bottom will be:

Expanding the left side of the equation:

Combine like terms and set the equation equal to zero:

Divide all terms by 4 to simplify:

Factor the quadratic equation:

Setting each factor equal to zero gives us the possible values for x:

Since the cardboard's dimensions are only 12 inches by 16 inches, x cannot be 11, because it would not leave any base for the box. Therefore, x must be 3 inches.

Hence, the lengths of the sides of the squares removed from each corner are 3 inches.

[tex]y=\dfrac{1}{2}x+2\\\\for\ x=0\to y=\dfrac{1}{2}(0)+2=0+2=2\to(0;\ 2)\\\\for\ x=2\to y=\dfrac{1}{2}(2)+2=1+2=3\to(2;\ 3)\\\\y=2x-1\\\\for\ x=0\to y=2(0)-1=0-1=-1\to(0;\ -1)\\\\for\ x=2\to y=2(2)-1=4-1=3\to(2;\ 3)\\\\Look\ at\ the\ picture.\\\\Answer:\ (2;\ 3)\to x=2;\ y=3.[/tex]

Answer:

C

Step-by-step explanation:

We can use the formula for chords ,and tangents

< ABC = 1/2 (ADYC - AC)

61 = 1/2(y - 119)

Answer:

Option C.  [tex]\frac{1}{2}[/tex] ( y-119 ) = 61

Step-by-step explanation:

In the given diagram AB and AC are tangents to circle O.

Length of arc AC = 119°

Inscribed angle between tangents AB and BC is 61°

We have to find the measure 'y' of arc ADC.

As we know the formula

m∠A = [tex]\frac{1}{2}[/tex] [m( arc ADC ) -m(arc AC)]

Now we put the values in this equation

61 = [tex]\frac{1}{2}[/tex] ( y-119 )

So Option C 61 = [tex]\frac{1}{2}[/tex] ( y-119 ) is the answer.

Answer: B. (3,9)

Step-by-step explanation:

7x -5y = -24(times by -1)

–9x + 5y = 18

-2x=-6

X= 3

(Substitute 3 in)

-9(3)+5y=18

-27+5y=18

5y=45

Y=9

Answer:

continuous.

Step-by-step explanation:

Given function is [tex]f(x)=5x^4-9x^3+x-7[/tex].

and value of a = 7.

Now we need to find if the given function [tex]f(x)=5x^4-9x^3+x-7[/tex] is continuous or not.

By definition of continuity, we know that a function is continuous at a given point if both left and right hand limits are equal.

Left Hand Limit = LHL

[tex]LHL=\lim_{x\rightarrow 7^-}f(x)=5(7)^4-9(7)^3+(7)-7=8918[/tex]

Right Hand Limit = RHL

[tex]RHL=\lim_{x\rightarrow 7^+}f(x)=5(7)^4-9(7)^3+(7)-7=8918[/tex]

Since both limits are equal at a=7 so we can say that given function is continuous at a=7

Answer:

Minimum 22 scarves Jenny has to sell in order to make a profit.

Step-by-step explanation:

Let the number of scarves knitted be  'x'.

Then cost price of the scarves = $ (160+4.5x)

Total selling price of the scarves = $ 12x

In order to attain a profit selling price > cost price

Therefore  12x > 160+4.5x

⇒12x - 4.5x > 160

⇒7.5x > 160

⇒ x >160÷7.5

⇒x > 21.33

SO minimum number of scarves should be 22 a whole number.

To find the minimum number of scarves Jenny must sell to make a profit, set up the inequality 12s > 160 + 4.50s, which represents her earnings from selling scarves being greater than her expenses. Solve for s to obtain s > 21.3. As scarves are sold in whole numbers, Jenny must sell at least 22 scarves to make a profit.

To determine the number of scarves that Jenny must sell in order to make a profit, we can set up and solve an inequality. The inequality will represent Jenny's total expenses compared to her total earnings.

Jenny's initial expenses are $160 and it costs $4.50 to make each scarf. This means her total expenses can be represented as 160 + 4.50s, where s is the number of scarves.

Jenny sells each scarf for $12, so her earnings from selling scarves can be represented as 12s.

To establish a profit, Jenny's earnings should be greater than her expenses, so:

12s > 160 + 4.50s

We can solve this inequality by first subtracting 4.50s from each side to isolate the variable:

7.5s > 160

Then, divide both sides by 7.5 to solve for s:

s > 21.3

Since scarves are sold in whole numbers, Jenny needs to sell at least 22 scarves to make a profit.

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Answer: 6.71

=======================================

Work Shown:

The longest horizontal portion of length 6 breaks up into two equal pieces of length 3 each. Focus on the smaller right triangle on the right hand side. This right triangle has legs of 3 and 6. The hypotenuse is x.

Use the pythagorean theorem with a = 3, b = 6, c = x to find the value of x

a^2 + b^2 = c^2

3^2 + 6^2 = x^2

9 + 36 = x^2

45 = x^2

x^2 = 45

x = sqrt(45)

x = 6.7082039

x = 6.71

Answer:

5.497787144 miles

Step-by-step explanation:

Remember that circumference of a circle can be calculated with:

[tex]2\pi r[/tex]

r=radius

We also know that the radius is just a half of the diameter.

So, the radius of the track is (1/2)/2=1/4 miles

Now, use the circumference of a circle formula to find how much she runs in 1 lap.

[tex]2\pi (\frac{1}{4} )[/tex]

Simplify

[tex]\frac{\pi }{2}[/tex]

This is how much she runs in 1 lap.

Multiply by 3.5 for 3 and a half laps.

[tex]\frac{\pi }{2}*3.5[/tex]

The answer is around 5.497787144 miles.

Answer:

18 hours

Step-by-step explanation:

We work in fractions of the job done per hour.

So in the case of Tran alone he does 1/9 of the job per hour.

We have the equation 1/9 + 1/x = 1/6  where x is the time taken for Luis to deliver the newspapers.

1/9 + 1/x = 1/6

Multiply through by the LCM 18x:-

2x + 18 =  3x

18 = x

the answer is:

18 hours !

[tex]\text{The explicit rule of geometric sequence}\\\\a_n=a_1 r^{n-1}\\------------------------------\\\text{We have the recursive form}\ a_1=4,\ a_n=\dfrac{1}{3}\cdot a_{n-1}.\\\\\text{Therefore}\ r=\dfrac{1}{3}.\ \text{Substitute:}\\\\\boxed{a_n=4\left(\dfrac{1}{3}\right)^{n-1}}[/tex]

Answer:

Anne found the 10th term of the following sequence. Her steps are shown below.

3, 7, 11, 15, …

1. common difference = 4, a1 = 3

2. an = 3 + (n - 1)4

3. an = 3 + 4n - 4

4. an = 4n - 1

5. a10 = 4(10) – 1

6. a10 = 39

Analyze Anne’s work. Is she correct? If not, what was her mistake?

Yes, she is correct.

No, she needed to find the common ratio because it is a geometric sequence.

No, she substituted the wrong values into the rule to find the equation that represented the sequence.

No, she solved for the 10th term incorrectly.

Step-by-step explanation:

First is "given", but we don't have to worry about that

Second is "subtraction property" because we subtract 2/3 from both sides

Third is "subtraction property" for similar reasons as before, but we subtract 3x from both sides

Fourth is "division property" because we divide both sides by -1. Note how the inequality sign flips. This is because we divide both sides by a negative number.

The last would be something along the lines of "simplify" or "reduce"

Answer:

Step-by-step explanation:

(5 - 3i)(6 + 2i)

30 + 10i - 18i - 6i²

i² = - 1

30 - 8i - 6 - (- 1)

30 - 8i + 6

- 8i + 36

36 - 8i

Alternative D

I hope I helped you.

Answer: D

Step-by-step explanation:

  (5 - 3i)(6 + 2i)

= 5(6 + 2i)  -3i(6 + 2i)

= 30 + 10i  -18i - 6i²

= 30 - 8i -6(-1)    because i² = -1

= 30 - 8i + 6

= 36 - 8i

Answer:

Mean is the sum of all the results included in the sample divided by the number of observations.

Explanation:

Suppose we have the score of 5 randomly selected students in a class.

The scores are:

[tex]45,48,52,65,78[/tex]

Now the mean of the 5 randomly selected students will be:

[tex]Mean = \frac{Sum-of-scores-of-five-students }{Number-of-students}[/tex]

          [tex]=\frac{45+48+52+65+78}{5}[/tex]

          [tex]=\frac{288}{5}[/tex]

          [tex]=57.6[/tex]

Therefore, the mean is 57.6

Answer:

A. As x→-∞ f(x) →-∞  and as x→∞ f(x) →-∞

Step-by-step explanation:

f(x) = -x^6 +2

As the numbers get very large, the 2 doesn't matter

Let x go to - ∞

f(-∞) = - (- ∞)^6

Anything to an even power is positive

f(-∞) = - ∞

As x →-∞   f(x) →-∞

Let x go to  ∞

f(∞) = - ( ∞)^6

Anything to an even power is positive

f(∞) = - ∞

As x →∞   f(x) →-∞

Answer:

 degree=2 leading coefficient=4

lowest degree = 3

maximum of 5 x-intercepts

[tex]y=-4x^7-5x+3[/tex] has y intecept 3

y approaches negative infinity

Step-by-step explanation:

(1) [tex]y=4x^2-3x+7[/tex]

Highest exponent is the degree of the function

Highest exponent =2  so degree =2

Coefficient of x^2 is 4, so leading coefficient is 4

(2) from the graph we can see that

As x approaches infinity, the graph goes down

As x approaches -infinity, the graph goes up

The value of y goes on the opposite direction. So it is a odd degree function. If degree =1  then the graph should be a line

Here the graph is like a curve. Also we have 2 x  intercepts . Hence lowest possible degree of the function is 3

(3) y=ax^5+cx^2+f

Here , the degree of the equation is 5

So we will get maximum of 5 x-intercepts

(4) To find the function that has y intercept of 3, we plug in 0 for x in each function

[tex]y=-4x^7-5x+3[/tex]

[tex]y=-4(0)^7-5(0)+3= 3[/tex]

[tex]y=-4x^7-5x+3[/tex] has y intecept 3

(5) [tex]y=-2x^{13}+25x^8-3[/tex]

Here degree is 13 that is odd  and leading coefficient is -2 ( negative)

Degree is odd and leading coefficient is negative so the graph of y goes down on the right side.

the graph of y approaches negative infinity when x approaches infinity

The degree and leading coefficient of the polynomial function y=4x2-3x+7 are 2 and 4 respectively. The maximum of x-intercepts for a polynomial graph y=ax5+cx2+f is 5. The polynomial function y=-4x7-5x+3 has a y-intercept of 3 and as x approaches infinity in the function y=-2x13+25x8-3, y approaches negative infinity.

1. The degree of the function y=4x2-3x+7 is 2 and the leading coefficient is 4. Therefore B. degree=2 leading coefficient=4 is correct.

2. As the image of the function graphed is not provided, it is impossible to definitively say what the lowest degree of the function is.

3. The maximum number of x-intercepts that can be found on a graph with the equation y=ax5+cx2+f is 5, matching the degree of the polynomial, so D. 5 is correct.

4. The polynomial function y=-4x7-5x+3 has a y-intercept of 3, therefore C. y=-4x7-5x+3 is correct.

5. Since the polynomial y=-2x13+25x8-3 has an odd degree and the leading coefficient is negative, as x approaches infinity, y approaches negative infinity. Therefore D. y approaches negative infinity is correct.

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Answer:

15.79% is the percent increase in price

Step-by-step explanation:

As per the given statement: In January the price of a kilogram of brand X rice was $7.60.

⇒ Price of  brand X in January =  $7.60

Also, it is given that in May the price of a kilogram of Brand X rice became $8.80.

⇒ Price of brand X in May = $8.80

Increase in price = $8.80 - $7.60 = $1.20

To find the percent increase in price;

[tex]Percent increase in price =\frac{Increase in price}{Price of X in January} \times 100[/tex]

                                         = [tex]\frac{1.20}{7.60} \times 100 = 15.79\%[/tex]

Therefore, the percent increase in price approx. is, 15.79%

The price of a kilogram of brand X rice increased by approximately 15.79% from January ($7.60) to May ($8.80).

To find the percent increase in price of the brand X rice from January to May, we first calculate the difference in price and then divide it by the original price.

After that, we multiply the result by 100 to get the percentage.

The original price in January was $7.60, and the new price in May was $8.80.

The difference in price is $8.80 - $7.60 = $1.20.

Now we divide the difference by the original price: $1.20 / $7.60 = 0.1579.

To find the percent increase, we multiply this number by 100: 0.1579 x 100 = 15.79%.

So, the price of a kilogram of brand X rice increased by approximately 15.79% from January to May.

Factor 6 from the first two terms.

By factoring out "a", you can better see what "h" needs to be.

Answer:

the linear function is y = x +3

A is correct option.

Step-by-step explanation:

The slope intercept form of a line is given by y = mx +b, where b is the y-intercept and m is the slope.

For y-intercept, x =0

From the given table, at x = 0, f(x)=3

Therefore, y-intercept, b= 3

Hence, the equation is in the form y = mx+3

Now, use the point (1,4) to find m

4 = m(1)+3

4 = m +3

m = 1

Therefore, the linear function is y = x +3

A is correct option.

Answers: (B) (2, -1) and (D) (5, 2)

Step-by-step explanation:

Inverse is when the x's and y's are swapped

Given: (-2, 5), (-1, 2), (0, 1), (2, 5)

Inverse: (5, -2), (2, -1) (1, 0), (5, 2)

The correct answer would be options (B) (2, -1) and (D) (5, 2)

The inverse function is defined as a function obtained by reversing the given function.

To determine the inverse of a function, all you have to do is switch where x and y are and resolve for y.

Given that the set of points is on the graph of a function.

{(−2, 5), (−1, 2), (0, 1), (2, 5)}

We have to find the inverse of the function below :

{(−2, 5), (−1, 2), (0, 1), (2, 5)}

When the values of x and y are switched, the inverse is true.

(-2, 5) ⇒ (5, -2),

(-1, 2) ⇒ (2, -1),

(0, 1) ⇒ (1, 0),

(2, 5) ⇒ (5, 2)

Hence, the points {(5, -2), (2, -1) (1, 0), (5, 2)} are on the graph of the inverse.

The correct answer would be options (B) (2, -1) and (D) (5, 2)

Learn more about the inverse function here:

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Mario can talk for 384 minutes on his prepaid phone plan, calculated by dividing his plan's cost, $50, by the per-minute rate of $0.13.

To determine how many minutes Mario can talk on his prepaid phone plan, you would divide the total amount of the plan by the cost per minute. Mario has $50 and the cost per minute is $0.13. To calculate the total minutes, use the formula:

Total Minutes = Total Plan Cost / Cost Per Minute

Let's do the math:

Total Minutes = $50 / $0.13

Total Minutes = 384.6154

Since we cannot have a fraction of a minute in this context, we round down to the nearest whole minute.

Therefore, Mario can talk for 384 minutes on his prepaid plan.

Answer:

The data is skewed, and the lowest number of crackers in a package was 7

Step-by-step explanation:

Hi,

First of all, since the question was incomplete due to the missing capture of the range shown on the box plot. I attached it for you so I could answer your question as well.

Taking into consideration the attached image's information, symmetric would be right down the middle, but it is not.

The image shows that it is positively skewed with the lowest number being 7.

Answer:

c

Step-by-step explanation:

did it on edge

Answer:

87 people in the restaurant, 45 people eat in the car and 57 people eat at home.

Step-by-step explanation:

Let x be 'restaurant-purchased meals eaten in a restaurant', y be the 'restaurant-purchased meals eaten in a car' and z be the 'restaurant-purchased meals eaten at home'.

We can use the given information "the total number of​ restaurant-purchased meals that the average person will eat in a​ restaurant, in a​ car, or at home in a year is 189" to write an equation [tex]x+y+z=189[/tex].

We can use the information "the total number of these meals eaten in a car or at home exceeds the number eaten in a restaurant by 15" to write another equation [tex]y+z=x+15[/tex].

We can use the information "thirty more​ restaurant-purchased meals will be eaten in a restaurant than at home" to write the third equation as x=z+30

Now we need to solve this system of three equations to get the values of x, y and z.

We can solve for x directly from the first two equations.

[tex]x+x+15=189\\2x=174\\x=87[/tex]

Substituting this value of x in the third equation we can get the value of z.

[tex]87=z+30\\z=57[/tex]

Finally, we can substitute the values of x and z in the first (or second) equation to get the value of y.

[tex]87+y+57=189\\y+144=189\\y=45[/tex]

Therefore, 87 people in the restaurant, 45 people eat in the car and 57 people eat at home.

The function factors as ...

... f(x) = -(x+3)(x+4)/((x-1)(x+4)) = -(x+3)/(x-1) . . . . x ≠ -4

and the quotient is ...

... f(x) = -(1 +4/(x-1))

... f(x) = -1 -4/(x-1) . . . . . x ≠ -4

This has a hole at x = -4 (where the denominator factor cancels the numerator factor), a vertical asymptote at x=1 (where the denominator is zero), and a horizontal asymptote at y = -1 (the value of the function for large values of x).