Help please!!

Celine observed that 80% of patrons at the local library liked reading sci-fi novels. If 35 patrons did not like reading sci-fi novels, how many patrons did enjoy sci-fi novels?

Part A: Write an equation in one variable that can be used to find the total number of patrons at the library? Define the variable used in the equation.

Part B: How many patrons enjoy reading sci-fi novels? Show your work.

Answers

Answer 1

Answer: Part A = (100% - 80%)P = 35, Part B = 140

Step-by-step explanation:

Percentage:  Like + Don't like = 100%

                     80%  + Don't like = 100%

                   -80%                         -80%

                                  Don't like = 20%

People: 20% of Patrons = Don't Like

             0.20  x Patrons = 35

          ÷ 0.20                   ÷ 0.20    

                           Patrons = 175

Now, let's write the equation we used to get that answer:

Let P represent the total number of patrons, then the equation is:

 (100% - 80%)P = 35

= (1.00 - 0.80)P = 35

=       0.20P     = 35

 =             P      = 175

Part B:  

80% of Patrons = Like

0.80  x    175      = Like

         140            = Like



Related Questions

plzzz help - i will mark brainest
1.-Write the recursive rule of the sequence 9, 3, 3, 9,... −− .
________________________________________
2.-A line has an x-intercept of (4, 0) and a y-intercept of (0, 12). Find the slope of the line.
________________________________________
3.-A horizontal line includes the points (0, -5 ) and ( 2, -5 ) Find the slope of the line.

Answers

Answer:

1. You divide by 3 then multiply by 1 and multiply by 3 again

2. Slope of -3

3. Slope of 0

Step-by-step explanation:


Complete the square to transform the quadratic equation into the equation form (x – p)2 = q. x2 + 14x + 34 = 5

Answers

(x + 7)² = 20

subtract 34 from both sides

x² + 14x = - 29

add (half the coefficient of the x- term )² to both sides

x² + 2(7)x + 49 = - 29 + 49

(x + 7)² = 20


Express the number in scientific notation.


0.00341 x 104

A) 3.41 x 10-3

B) 3.41 x 10-1

C) 3.41 x 101

D) 3.41 x 104

Answers

B) 3.41×10-1 is the right one

Answer:

It's 3.14x10^1

Step-by-step explanation:


please help asap 30 pts

Answers

[tex]14-4y\geq38\qquad|\text{subtract 14 from both sides}\\\\-4y\geq24\qquad|\text{change the signs}\\\\4y\leq-24\qquad|\text{divide both sides by 4}\\\\y\leq-6\\\\Answer:\ \boxed{d.\ y\leq-6}[/tex]

I got the answer is (d)

True or false? The circumcenter of a triangle is the center of the only circle that can be circumscribed about it

Answers

Answer:

The statement is true.

Step-by-step explanation:

Given the statement we have to tell the statement is true or false.

The statement is

"The circumcenter of a triangle is the center of the only circle that can be circumscribed about it"

The circumcenter of triangle is the point in the triangle where the perpendicular bisectors of sides intersect.

The center of the circumscribed circle is the the point where the perpendicular bisectors of the sides meet.

Hence,

The circumcenter is also center of the triangle's circumcircle - the circle that pass through all three of the triangle's vertices.

Therefore, the given statement is true.

Answer:

True

Step-by-step explanation:

Circumcircle: A circle drawn outside a circle is called circumcircle and its center is called circum-center.

Circum-center of triangle:It is the point where the perpendicular bisectors of a  triangle intersect.

The circumcenter of triangle is also the center of triangle's circumcircle.

The circumcenter is equidistant from each vertex of the triangle.

The circumcenter of right triangle falls on the side opposite the right triangle.

Hence, the circumcenter of a triangle is the center of the only circle that can be circumscribed about it.

Answer :True

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!

Solve the equation.

x^2 + 10x + 24 = 0


A) -12 and 2

B) 12 and -2

C) -4 and -6

D) 4 and 6

Answers

[tex]x^2 + 10x + 24 = 0\\\\x^2+2x+12x+24=0\\\\x(x+2)+12(x+2)=0\\\\(x+12)(x+2)=0\\\\x=-12 \vee x=-2\Rightarrow \text{A}[/tex]

A company sells lab equipment. The daily revenue and costs are modeled by the functions below where x is the number of units sold.

Pleeeeaaasssseeeee help! <3 I'm just trying to graduate.thanks.

Answers

Subtract the cost from the revenue:

(-0.32x^2+270x) - (70x+52)

270x - 70x = 200x


The answer would be -0.32x^2 + 200x + - 52

Answer:

P(x) = -0.32x² + 200x + (-52)

Step-by-step explanation:

A company sells lab equipment. Daily revenue and costs are modeled by the function as given in the question.

Revenue:             R(x) = -0.32x² + 270x

Cost :                   C(x) = 70x + 52

Here x = Number of units sold.

Now we have to determine the function P(x) for daily profit.

Since Profit = Revenue - Cost

            P(x) = R(x) - C(x)

            P(x) = (-0.32x² + 270x) - (70x + 52)

                   = -0.32x² + 270x - 70x - 52

            P(x) = -0.32x² + 200x - 52

Therefore, answer will be P(x) = -0.32x² + 200x + (-52)

A car travels 65km in 45minutes. What is the average speed of the car in km/h

Answers

65X60/45=260/3km/hr=86.66km/hr

Parabolas A and B both have a focus at (2, 2). Parabola A has a directrix at x = -1 and parabola B has a directrix at x = 5. What is the distance between the vertices of the two parabolas?
A. 1.5
B. 3
C. 4
D. 5
E. 6

Answers

Parabola A: directrix is at x = -1 and focus is at (2,2) so the vertex is the midpoint between those.  Vertex = (0.5, 2)

Parabola B: directrix is at x = 5 and focus is at (2,2) so the vertex is the midpoint between those.  Vertex = (3.5, 2)

Distance between Vertex A and Vertex B is the distance between (0.5, 2) and (3.5, 2) = 3

Answer: B

Joseph completed the two-way table on the left about the social networking habits of his classmates as follows:

Step 1: 85 – 30 = 55

Step 2: 80 – 55 = 25

Step 3: 140 – 80 = 60

Step 4: 60 – 30 = 30

Step 5: 25 + 30 = 55

Choose ONE OPTION from BELOW
The student made...

A) and error in step 1
B) and error in step 2
C) an error in step 3
D) an error in step 4
E) an error in step 5
F) no error

Answers

Joseph made no error.

The answer is F) no error

Answer:

Option: F is the correct answer.

F) No error.

Step-by-step explanation:

We are given the steps that Joseph used while solving as:

Step 1: 85 – 30 = 55

Step 2: 80 – 55 = 25

Step 3: 140 – 80 = 60

Step 4: 60 – 30 = 30

Step 5: 25 + 30 = 55

Clearly the steps involves simple addition as well as subtraction of the mathematical numbers.

Hence all his steps are correct as he has not committed any wrong operation.He evaluated the expressions in the right manner.

          Hence, the answer is:

                    Option: F

A rectangular field is three times as long as it is wide. If the perimeter of the field is 600 feet, what are the dimensions of the field?

Answers

Final answer:

To find the dimensions of the field with a perimeter of 600 feet where the length is three times the width, solve the equation derived from the perimeter formula. The width comes out to be 75 feet and the length 225 feet.

Explanation:

The question is about finding the dimensions of a rectangular field that is three times as long as it is wide, with a total perimeter of 600 feet. First, let's denote the width of the field as W and the length as 3W since the length is three times the width. The formula for the perimeter of a rectangle is 2(length + width), which in this case is 2(3W + W) = 8W. Given that the perimeter is 600 feet, we can set up the equation 8W = 600. Solving this for W gives us W = 75 feet. Therefore, the length, being three times the width, is 225 feet.

So, the dimensions of the field are 75 feet in width and 225 feet in length.

The graph models the function f(x) = 2(1/2)x. What is the domain and range of the function?

A-Domain: x < 0; Range: y > 0

B-Domain: x > 0; Range: all real numbers

C-Domain: all real numbers; Range: y > 0

D-Domain: all real numbers; Range: y ≥ 0

Please explain with the answer !!

Answers

Hello!

Given the function, [tex]f(x) = 2(\frac{1}{2})^{x}[/tex], notice that the function f(x) is an exponential function.

All exponential functions have a horizontal asymptote at y = 0, and this means that the graph never goes over the line y = 0. Therefore, the range is less than zero, but never equal to zero.

Also, this means that the domain of the function f(x) is all real numbers because as we substitute positive x-values into the function, the graph goes closer to zero, but never across zero. But, if we substitute negative x-values into the equation, it goes to infinity.

Therefore, the answer is choice C. The domain of f(x) is all real numbers, and the range is y > 0.

We want to find the domain and range of the given equation.

We will see that the correct option is C:

Domain: all real numbers;

Range: y > 0

First, we need to define what these are.

For a given function y = f(x), the domain is the set of all the possible x-values we can input on the function, and the range is the set of the possible outcomes.

We have the exponential equation:

f(x) = 2*(1/2)^x

To get the domain we start by assuming that the domain is the set of all real numbers, and then we see if the equation has a problem for a given value of x, then we remove that from the domain.

But here we have x on the exponent, so there are no value of x that causes problems, thus the domain is the set of all real numbers.

To get the range we can look at the graph, we can see that the range goes from near 0 to infinity, so we can say that:

range = y > 0.

(note that the function tends asymptotically to zero, meaning that it never becomes equal to zero).

Then the correct option is C:

Domain: all real numbers;

Range: y > 0

If you want to learn more, you can read:

https://brainly.com/question/21853810

The cost of a tyre has increased by 20% to £78. Work out the original price. Please reply ASAP, thank you.

Answers

10% of £78 is £7.80 (78 / 10)
20% of £78 is £15.60

£78 - £15.60 = £62.40 was the original price

The skeeters baseball team charges $7. Per ticket plus $3. Processing fee for each order. Is the cost of an order proportional to the number of tickets ordered? Explain how you know.

Answers

It's proportional

10-3=7 7/1 = 7

17-3=14 14/2=7

31-3=28 28/4=7

38-3=35 35/5=7

73-3=70 70/10=7

Question 4 Unsaved
Henry places x marbles into an empty bucket. Each marble has the same weight. The weight, in ounces, of the bucket and marbles can be calculated using the expression shown.

3x + 8

What does the term 8 represent in this expression?

Question 4 options:

the weight of each marble


the weight of the empty bucket


the number of marbles


the total weight of the bucket and marbles

Answers

Here in the given equation, 3x + 8 the term 8 represents the weight of the empty bucket.

Its given that the number of marbles is x, and the weight of each marble is same which is 3. So, total weight of marbles is 3x.

Now, if 3x + 8 is the weight of the bucket and marbles, then 8 represents the weight of the empty bucket.


If 45 Cookies will serve 15 student do you live students,how many cookies are needed for 30 students?

Answers

90

divide 45 cookies by 15 to obtain cookies per student then multiply this amount by 30 to obtain cookies for 30 students

15 students → 45 cookies

30 students → 45 × [tex]\frac{30}{15}[/tex] = 90 cookies


if 1-f=9/10 what is f

Answers

Hello there!

[tex]1-f=\frac{9}{10}[/tex]

Explanation:

↓↓↓↓↓↓↓↓↓↓↓↓↓

First you had to subtract by 1 from both sides of the equation.

[tex]1-f-1=\frac{9}{10}-1[/tex]

Simplify

[tex]-f=-\frac{1}{10}[/tex]

Then you divide by -1 from both sides of the equation.

[tex]\frac{-f}{-1}=-\frac{1}{10}/-1[/tex]

Simplify it should the correct answer.

[tex]f=\frac{1}{10}[/tex]

Answer⇒⇒⇒f=1/10

Hope this helps!

Thank you for posting your question at here on Brainly.

Have a great day!

-Charlie

What is the area of the shaded region in the diagram? Use the value `pi` = 3.14, and round your answer to two decimal places.

Answers

Answer:

Can you attach a picture of the diagram?

Step-by-step explanation:


Answer:

9.42 Square Units

How:

You need to use the sector area formula.

Sector Area = Measure of Arc / 360° × π r²

So then you just plug in the numbers:

Sector Area = 45° / 360° × π 5²

Sector Area = 1/8 × 25π

Sector Area = 9.817477


Sector Area = 45° / 360° × π 7²

Sector Area = 1/8 × 49π

Sector Area = 19.242255

Then all you have to do is subtract them both to find the area.

19.242255 - 9.817477 = 9.42 Square Units

I Hope this helped!

What is the answer to 99.55 divided by 1.1 worked out???

Answers

Answer:

90.5

Step-by-step explanation:

 0 9 0. 5 0 0

1 1 9 9 5. 5 0 0

 − 0          

   9 9        

 − 9 9        

     0 5      

   −   0      

       5 5    

     − 5 5    

         0 0  

       −   0  

           0 0

         −   0

             0

find the value of x for which l is parrell to m

Answers

if l and m are parallel, then 2x and 5x + 40 sum to 180

[tex]2x + 5x + 40 = 180 \\ 7x = 140 \\ x = 20[/tex]

4x + 8 = 2x + 7 + 2x - 20.

PLEASE SHOW WORK!!!

Answers

How to get answer:

[tex]\mathrm{Group\:like\:terms}\\4x+8=2x+2x+7-20\\\mathrm{Add\:similar\:elements:}\:2x+2x=4x\\4x+8=4x+7-20\\\mathrm{Add/Subtract\:the\:numbers:}\:7-20=-13\\4x+8=4x-13\\\mathrm{Subtract\:}8\mathrm{\:from\:both\:sides}\\4x+8-8=4x-13-8\\\mathrm{Simplify}\\4x=4x-21\\\mathrm{Subtract\:}4x\mathrm{\:from\:both\:sides}\\4x-4x=4x-21-4x\\Simplify\\0=-21\\The\:sides\:are\:not\:equal\\[/tex]

Steps:

4x + 8 = 2x + 7 + 2x - 20

Group like terms:

4x + 8 = 2x + 2x + 7 - 20

Add similar elements: 2x + 2x = 4x

4x + 8 =4x + 7 - 20

Add/Subtract the numbers: 7 - 20 = -13

4x + 8 = 4x - 13

Subtract 8 from both sides

4x + 8 - 8 = 4x - 13 - 8

Simplify:

4x = 4x - 21

Subtract 4x from both sides:

4x - 4x = 4x - 21 - 4x

Simplify

0 = -21

Hope this helps! :) and Happy Halloween! ~Zane


Can someone help me with this math question pls?

Answers

Solution is attached below

What is bigger 400 pints or 100 gallons


Answers

Easy,

100 gallons=800 pints

There are 8 pints to a gallon. Since 100 gallons is the same as 800 pints, that is larger than 400 pints, Witch is also 50 gallons.

So ill say 100 gallons are bigger. :)

A triangle has side lengths of 8 inches,12 inches,and 16 inches. Determine whether this is a right triangle and why.

Answers

8²+12²≠16²
the answer is no

Answer:

the answer is no

Step-by-step explanation:

8²+12²≠16²


What is the volume of a cube with edge 5cm

Answers


[tex]125cm {}^{3} [/tex]

Given the following perfect square trinomial, fill in the missing term.

x2 − 16x + ____

Answers

Answer:

[tex]x^{2}-16x+64[/tex]

Step-by-step explanation:

To solve this problem you must apply the proccedure shown below:

1. You have the following perfect square trinomial given in the problem:

[tex]x^{2}-16+[/tex]

2. To fill the missing term, you must divide the coefficient -16 by 2 and then you must square it, as following:

[tex](\frac{-16}{2})^{2}=(-8)^{2}=64[/tex]

Math, Not sure how to do this one help me out please?

Answers

You need to know the 30-60-90 triangles rules for lengths. (b, b√3, 2b)

the given side length of corresponds to the 30° angle.  So, b = 8

side y corresponds to the 60° angle so it is b√3. Since we determined that b = 8, then b√3 is 8√3.

side x corresponds to the 90° angle so it is 2b.  Since we determined that b = 8, then 2b = 2(8) = 16

Answer: x = 16, y = 8√3

Which of the following is the equation of a line in slope intercept form for a line with slope = 2/3 and y-intercept at (0,-2)

Answers

*(The Answer)*= [tex]y = \frac{2}{3} x-2[/tex]

*(Equation)*= The equation for slope-intercept form is [tex]y=mx+b[/tex]

*(Additional Information)*=                                                                                                   m = slope, and b = y-intercept

Hope this helps

Person who answered: BangtanBoyScouts

Answer:  The correct option is

(C) [tex]y=\dfrac{2}{3}x-2.[/tex]

Step-by-step explanation:  We are given to select the equation of a line in slope-intercept form with slope [tex]\dfrac{2}{3}[/tex] and y-intercept at (0, -2).

We know that

the slope-intercept form of the equation of a line with slope m and y -intercept at the point (0, c) is given by

[tex]y=mx+c.[/tex]

For the given line, we have

[tex]\textup{slope, }m=\dfrac{2}{3},\\\\\\\textup{y-intercept},~(0,c)=(0,-2)\\\\\Rightarrow c=-2.[/tex]

Therefore, the equation of the line in slope-intercept form is

[tex]y=mx+c\\\\\Rightarrow y=\dfrac{2}{3}x+(-2)\\\\\\\Rightarrow y=\dfrac{2}{3}x-2.[/tex]

Thus, the required equation of the line in slope-intercept form is [tex]y=\dfrac{2}{3}x-2.[/tex]

Option (C) is CORRECT.


Which of the following are ordered pairs for the equation y = -4x + 5?


(0,5) (1,1) (-1,9)


(0,5) (-1,-1) (-1,-9)


(0,5) (1,-1) (-1,9)


(0,5) (-1,1) (-1,-9)

Answers

(0, 5), (1, 1 ), ( - 1, 9 )

to test the points substitute the x-coordinate into the equation and if the value is equal to the y- coordinate then it is an ordered pair

(0, 5 ) → y = 0 + 5 = 5 ← ordered pair

(1, 1 ) → y = - 4 + 5 = 1 ← ordered pair

(- 1, 9 ) → y = 4 + 5 = 9 ← ordered pair

( - 1, - 1 ) → y = 4 + 5 = 9 ← not an ordered pair

( - 1, - 9 ) → y = 4 + 5 = 9 ← not an ordered pair

(1, - 1 ) → y = - 4 + 5 = 1 ← not an ordered pair

(- 1, 1 ) → y = 4 + 5 = 9 ← not an ordered pair


A parts distributor's customers always order spark plugs in groups of 4, 6, or 8. Which is the smallest quantity the supplier has that could accommodate every order?

Answers

Answer:

24 spark plugs

Step-by-step explanation:

To find smallest quantity that could accommodate every order we will find LCM of 4,6 and 8.

Multiples of 4 are: 4,8,12,16,20, 24,28,..

Multiples of 6 are: 6,12,18,24,30,36,42,..

Multiples of 8 are: 8,16,24,32,40,..    

We can see that LCM of 4, 6 and 8 is 24. Therefore, order of 24 spark plugs will accommodate every order.

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