The function f(x) = 2x2 + 3x + 5, when evaluated, gives a value of 19. What is the function’s input value?

Answers

Answer 1

Answer:

-7/2 or 2 are inputs that give 19 as output.

Step-by-step explanation:

The problem gives us a quadratic function [tex]\displaystyle \large{f(x)=2x^2+3x+5}[/tex]. When its output is 19, we want to know the input value(s).

Since an output which is f(x) = 19. Therefore:

[tex]\displaystyle \large{19=2x^2+3x+5}[/tex]

Rearrange the expression in quadratic equation.

[tex]\displaystyle \large{0=2x^2+3x+5-19}\\\\\displaystyle \large{0=2x^2+3x-14}\\\\\displaystyle \large{2x^2+3x-14=0}[/tex]

Factor the expression.

[tex]\displaystyle \large{(2x+7)(x-2)=0}[/tex]

Solve like linear equation which we get:

[tex]\displaystyle \large{x=-\dfrac{7}{2}, 2}[/tex]

If you input these x-values in the function, you will get 19 as the output which satisfies the condition.

Hence, inputs are -7/2, 2

Answer 2

Answer:

[tex]x=2, \quad x=-\dfrac{7}{2}[/tex]

Step-by-step explanation:

Set the function to 19:

[tex]\implies 2x^2+3x+5=19[/tex]

Subtract 19 from both sides:

[tex]\implies 2x^2+3x-14=0[/tex]

To factor a quadratic in the form [tex]ax^2+bx+c[/tex]

Find two numbers that multiply to [tex]ac[/tex] and sum to [tex]b[/tex]:  7 and -4

Rewrite [tex]b[/tex] as the sum of these two numbers:

[tex]\implies 2x^2-4x+7x-14=0[/tex]

Factorize the first two terms and the last two terms separately:

[tex]\implies 2x(x-2)+7(x-2)=0[/tex]

Factor out the common term (x - 2):

[tex]\implies (2x+7)(x-2)=0[/tex]

Therefore the function's input values that when evaluated give a value of 19 are:

[tex](2x+7)=0 \implies x=-\dfrac{7}{2}[/tex]

[tex](x-2)=0 \implies x=2[/tex]


Related Questions

Ms. Lui earned an annual income of 775,000, what is the weekly salary?

Answers

Answer:

$14,903.85

Step-by-step explanation:

So, Ms. Lui earns $775,000 each year. To find the weekly salary, we have to divide the annual income by the amount of weeks in a year. There are about 52 weeks in one year. Let's find the weekly salary:

[tex]\frac{775000}{52} = 14,903.85[/tex]

Therefore, Ms. Lui earns $14,903.85 a week.

Hope this helps! If you have questions about my work, please leave them in the comments!

There are 5 new books and 6 used books on a shelf. (a) What is the ratio of used books to all books on the shelf?

Answers

6:11

If there are 6 used books and 11 total books, then there are 6 used books per 11 total books hence 6:11
6:11 you can easily look it up aswell if you don’t believe me

What is the future value of a 5-year annuity due with annual payments of $ 2,535 , evaluated at a 14.18 percent interest rate? Enter your answer to the nearest $.01. Do not use $ or , signs in your answer. Enter your answer as a positive number.

Answers

Answer:

  $19,201.09

Step-by-step explanation:

The future value of the annuity due can be found using any of a number of apps, calculators, or spreadsheets. It can also be found using the formula ...

  A = P(1 +r)((1 +r)^n -1)/r

where P is the annual payment, r is the annual interest rate, and compounding is yearly for n years.

  A = 2535(1.1418)(1.1418^5 -1)/0.1418 ≈ 19,201.09

The value will be $19,201.09.

the perpendicular distance of a point from the x-axis is 4 units and the perpendicular distance from the y axis is 5 units write the coordinates of such a point if it lies in the first quadrant second quadrant third quadrant and fourth quadrant​

Answers

Step-by-step explanation:

let p be the point which is at a distance of 4 units from the x-axis and at a distance of 5 units from the y axis

(i) When P lies in the first quadrant then the coordinates of P are (5,4).

(ii) When of P lies in the second quadrant then the coordinates of P are (-5,4).

(iii) When P lies in the third quadrant then the coordinates of P are (-5,-4).

(iv) When P lies in the fourth quadrant then the coordinates of P are (5,-4).

Hope it helps you!!

Known as periodic reports, interim reports or interim statements, these updates provide important company information between annual reporting periods. To help protect investors and keep the public informed, regulations typically require public companies to submit company performance reports more than once a year.Known as periodic reports, interim reports or interim statements, these updates provide important company information between annual reporting periods. To help protect investors and keep the public informed, regulations typically require public companies to submit company performance reports more than once a year.

9 cm
6 cm
8 cm
12. Some high school students made a rectangular prism-shaped box, shown in the figure, to
will be available. Find the volume of the rectangular prism.
OA. 432 cm³
O B. 348 cm³
O C. 729 cm³
O D. 512 cm³
O Mark for review (Will be highlighted on the review page)

Answers

Answer:

A

Step-by-step explanation:

the answer is A because I said its C :)

Design an instructional activity that could help learners recognise that decimal
fractions can be applied across environmental situations (relating to activities
in real life).

Answers

Fraction refers to a part of a whole; e.g when cup is not completely filled, it covers only a part of the cup

What is fraction?

The term fraction refers to a part of a whole. To design an instructional activity that  could help learners recognize that decimal fractions can be applied across environmental situations, we could look at certain things in the house.

For instance, when cup is not completely filled, it contains water that covers only an fraction of the cup. Also, we could boil a part and not a whole cup of rice. These are all examples of fractions.

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Jasmine played in a basketball tournament. The ratio of the number of baskets she missed during the tournament to the number of baskets she made is 3:8. If Jasmine missed 9 baskets during the tournament, how many baskets did she make? Draw a diagram to demonstrate how you found your answer.

Answers

By using the given ratio, we will conclude that she made 24 baskets.

how many baskets did she make?

We know that the ratio of the number of baskets she missed to the number of baskets she made is 3:8.

This means, for each 3 missed baskets, she made 8.

Here we know that she missed 9. If we divide that by 3, we get:

9/3 = 3.

This means that she missed 3 baskets 3 times. And for each one of these 3 times she makes 8 baskets (for the given ratio).

Then we conclude that she makes 8*3 = 24 baskets.

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Just a little help :,(

Find the volume of the cone. Round your answer to the nearest tenth. Use 3.14 for T.
9 in.
in³.
3 in.
The volume is about


Answers

Answer = 84.8 cu in.

V= 1/3 x pi x r^2 x height
V= 1/3 x 3.14 x 9 x 9
V = 84.8 cu in.

Please help me with my math

Answers

the answer to this is A ! trust

The product of two numbers is 5, if their sum is 9/2. What are the numbers? with detail explaniation

Answers

Answer: The numbers are 2 and 2.5

Explanation:

Let one number be "x" and another "y", Note: 9/2 = 4.5 [in decimal form]

[tex]\rule{185}{2}[/tex]

Their product :

[tex]\hookrightarrow \sf x \ \cdot \ y = 5[/tex]    

[tex]\hookrightarrow \sf x = \dfrac{5}{y} \quad \ \ \leftarrow \quad equation _1[/tex]

Their sum :

[tex]\hookrightarrow \sf x + y = 4.5[/tex]

[tex]\hookrightarrow \sf x = 4.5-y \quad \ \ \leftarrow \ equation_2[/tex]

Solve them simultaneously:

[tex]\rightarrow \sf 4.5 - y = \dfrac{5}{y}[/tex]

cross multiply

[tex]\rightarrow \sf y(4.5 - y) = 5[/tex]

distribute inside parenthesis

[tex]\rightarrow \sf -y^2 +4.5y - 5 = 0[/tex]

multiply by -1

[tex]\rightarrow \sf y^2 -4.5y + 5 = 0[/tex]

factor them out

[tex]\rightarrow \sf ( y - 2.5)(y - 2)= 0[/tex]

set to 0

[tex]\rightarrow \sf y = 2.5, \ 2[/tex]

Another number:

When one number is 2.5, then another: 4.5 - 2.5 = 2

When one number is 2, then another: 4.5 - 2 = 2.5

Hence, the numbers are 2.5 and 2

Check:

Product: 2 × 2.5 = 5Sum: 2 + 2.5 = 4.5 or 9/2

The numbers obtained by the given condition that the product of two numbers is 5 if their sum is 9/2 will be x =( 2 or 5/2) and y = ( 2 or 5/2).

How to form an equation?

Determine the known quantities and designate the unknown quantity as a variable while trying to set up or construct a linear equation to fit a real-world application.

In other words, an equation is a set of variables that are constrained through a situation or case.

Let's say the first number is x and the second is y then

Product xy =  5

Sum x + y = 9/2

substitute y = 9/2 - x into first

x( 9/2 - x) = 5

2x² - 9x + 10 = 0

2x² -5x -4x + 10 = 0

x( 2x - 5 ) -2( 2x -5 ) = 0

(x -2)(2x -5) = 0

x =2 and x = 5/2

Corresponding to x y will be y = 2 and y = 5/2.

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please I need the answer

Answers

2nd one is the answer

Answer:

The answer is c

Step-by-step explanation:

one add the numbers 108 & 96=204

then add the numbers from c which is 30+30=60 43+43=86 29+29=58

then add 60+86+58 which will be 204 so c is the answer your welcome

come

200 people are asked about three brands of beverages Coffee, Tea and Chocolate. 36 like
Coffee only, 46 like Coffee but not Tea, 52 like Coffee, 16 like Tea and Chocolate, 96 like
Chocolate, 16 like Coffee and Chocolate while a total of 108 like one and only one of the
beverages.
Required
i) Calculate the number of people like black coffee?
ii) How many people don’t like any of the drinks?

Answers

Answer:

32

Step-by-step explanation:

Answer:

  i) 52

  ii) 66

Step-by-step explanation:

This sort of problem is usually solved using some sort of table or Venn diagram. We have used a table in the attachment such that each of the cells in the grid represents one of the 8 possible combinations of coffee, tea, or chocolate.

The numbers in black are given directly by the problem statement. The numbers in blue are calculated from the numbers in black and one of the other given numbers in the problem statement. The numbers in red are calculated so the totals work out correctly.

The cells shaded blue-gray are "one and only one" of the drinks. The cell shaded purple-gray is "don't like any".

__

i) black coffee

We assume that any form of "coffee" is "black coffee." The problem statement tells us 52 people like coffee.

__

ii) none

The last number we calculated is the number who like none of the drinks: 66. This brings the total of non-coffee drinkers to 148.

_____

Additional comment

As noted above, the colors more or less indicate the order of the calculations. We started with 36 who like coffee only, and 46 who like coffee and not tea. That means 46-36=10 like coffee and chocolate, but not tea.

Since 16 like coffee and chocolate, that leaves 16-10=6 who like coffee and tea and chocolate (all three).

96 like chocolate, but 16 of those like chocolate and tea. The other 80 like chocolate, but not tea.

46+16=52, so there must be 0 who like coffee and tea, but not chocolate.

The number who like only one is 108. We already have 36 that are coffee only, 80-10 = 70 that are chocolate only, so there must be 108 -70 -36 = 2 who like tea only.

Now, we can finish filling the top row of the table and the totals in the bottom row.

A candidate for office plans to visit 6 cities before the state primary.

How many different ways can the campaign staff arrange her travel route?

Enter your answer as a whole number, like this: 42

Question 2
A candidate for office plans to visit 6 cities before the state primary.

How many different ways can the campaign staff arrange her travel route?

Enter your answer as a whole number, like this: 42

Answers

There are 720 different ways the campaign staff can arrange her travel route

How to determine the number of route?

The given parameter is:

Cities = 6

The candidate cannot be at all 6 cities at the same time.

This means that we make use of factorial.

So, we  have:

Ways = 6!

Evaluate the factorial expression

Ways = 720

Hence, there are 720 different ways the campaign staff can arrange her travel route

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Will give 50 points for answer to this question

Answers

im pretty sure its the third option

A company boss is planning on ordering a gift for each of his employees. He takes a sample of 30 employees in the company and asks them what gift they would like. The table shows the information about his results. Gift Number of employees iPad 12 phone 5 watch 9 voucher 4 There are 110 employees in the company. Work out how many watches should be ordered.​

Answers

Answer:

I think the answer is 33

Step-by-step explanation:

Extremely sorry if it's wrong

Determine the value of y.

135°


27°


24°



45°

Answers

The answer is 27, hope this helps

What is the surface area of the rectangular prism
represented by the net shown?
6 in.
1.5 in.
1.5.in.

Answers

#2

The shape can be cut into four rectangles and two squares.

Total surface area:

⇒ four rectangles + two squares

⇒ 4(Length × Width) + 2(side × side)

⇒ 4(6 × 1.5) + 2(1.5 × 1.5)

⇒ 36 + 4.5

⇒ 40.5 inch²

Therefore, the surface area of the rectangular prism is 40.5 inch²

#3

The polygons that would be used in this net surface area are:

rectangle

✔ square

Answer:

40.5 in²

Step-by-step explanation:

Formula applied :

Surface Area (rectangular prism)

⇒ 2(Length × Width + Width × Height + Length × Height)

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

Given :

⇒ Length = 6 inches

⇒ Width = 1.5 inches

⇒ Height = 1.5 inches

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

Solving :

⇒ Surface Area = 2(6 × 1.5 + 1.5 × 1.5 + 6 × 1.5)

⇒ Surface Area = 2(9 + 2.25 + 9)

⇒ Surface Area = 2 × 20.25

⇒ Surface Area = 40.5 in²

If a multiple-choice test consists of 5 questions, each with 4 possible answers of which only 1 is correct, (a) in how many different ways can a student check off one answer to each question?
(b) in how many ways can a student check off one answer to each question and get all the answers wrong?

Answers

Answer:

  (a)  1024 ways

  (b)  243 ways

Step-by-step explanation:

When answers are independent, the total number of ways all questions can be answered is the product of the number of ways each question can be answered.

__

(a)

The first question can have one answer 4 ways. The second question can be answered 4 ways for each of the ways the first question was answered. That is, the two questions can be answered 4×4 = 16 ways. Similarly, each additional question multiplies the number of ways the questions can be answered by 4.

The 5 questions can be answered 4×4×4×4×4 = 4^5 = 1024 ways.

__

(b)

There are 3 ways to answer the first question incorrectly. Each additional question can be answered incorrectly 3 ways for each of the ways previous questions were answered. The total number of ways all questions can be answered incorrectly is ...

  3^5 = 243

A student can answer all questions wrong in 243 different ways.

Help please with me math!!

Answers

Answer:

17.3

Step-by-step explanation:

d = √((x2 - x1)^2 + (y2 - y1)^2)

Find the difference between coordinates:

(x2 - x1) = (-9 - 8) = -17

(y2 - y1) = (-6 - -3) = -3

Square the results and sum them up:

(-17)^2 + (-3)^2 = 289 + 9 = 298

Now Find the square root and that's your result:

Exact solution: √298 = √298

Approximate solution: 17.2627

Which represents the inverse of the
function f(x) = 4x?
• h(x) = X + 4
O h(x) = x - 4
O h(x) = 3/4x
O h(x) = 1/4X

Answers

Answer:

Step-by-step explanation:

What is the length of a diagonal of a square with a side length of 8?
A. 4
B. 42
C. 4√3
D. 8√√2

Answers

The answer is B because it’s multiplying 4 x 2 which is equal to 8.

He was, without a doubt, the most prolific writer of mathematics of all time. Euler is credited as being the first mathematician to define function in the way we currently think of functions. In his book, Introductio in analysin infinitoriumin, he stated, “A function of a variable quantity is an analytic expression composed in any way whatsoever of the variable quantity and numbers or constant quantities.”

Based on what we know a function to be today, what did Euler mean by an analytic expression?

an expression formed with many variables and no numbers
an expression formed with many numbers and no variables
an expression formed from operations such as addition, multiplication, powers, and roots
an expression formed using only multiplication of a variable and a number

Answers

Based on what we know a function to be today, Euler mean an analytic expression "an expression formed from operations such as addition, multiplication, powers, and roots"

Euler's definition of a function

According to Euler, a function of a variable quantity is an analytic expression composed in any way whatsoever of the variable quantity and numbers or constant quantities.”

The function is. combination of expression which includes variables and constants using various operations such as roots, power and multiplication.

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Two lines are intersecting. What is the value of x?

Answers

Answer:

The correct answer is x = 51.

Step-by-step explanation:

We have been given an image of two intersecting lines. We are asked to find the value of x.

We can see that both angles are supplementary (adding up to 180 degrees), so we can set an equation as:

x + 23 + 2x + 4 = 180

x + 2x + 4 + 23 = 180

3x + 27 = 180

3x + 27 - 27 + 180 - 27

3x = 153

3x/3 = 153/3

x = 51

Therefore, the value of x is 51.

Hope this helps:) Goodluck!

Answer:

Step-by-step explanation:

2x + 4 + x + 23 = 180

3x + 27 = 180

3x = 153

x = 51

Which of the following equations is equivalent to S=pi r^2 h

Answers

The equation that is equivalent to S=pi r^2 h is h = S/pir^2

Subject of formula

This is a way of representing a variable with another. Given the equation

S=pi r^2 h

We are to make 'h" the subject of the formula.

Divide both sides by pir^2

S/pir^2 =pi r^2 h/pir^2

h = S/pir^2

Hence the equation that is equivalent to S=pi r^2 h is h = S/pir^2

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Find the area of a regular polygon with 7 sides that has a perimeter of 63 inches and an apothem of 8 inches.

Area = [?]in2

Answers

Answer:

see the attachment photo!

Find the value of x.
33°
107°
x

Answers

Answer:

140

Step-by-step explanation:

Angles in a triangle add up 180 :

180 = 107 + 33 + y

y = 180 - (107+33)

y = 180 - 140

y = 40

Angles on a straight line add up to 180 so :

180 = x + y

180 = x + 40

x= 180 - 40

x = 140

Hope this helped and have a good day

Answer:

x = 140°

Step-by-step explanation:

Concepts

The Exterior Angle Theorem states that the two remote angles in a triangle is equal to the exterior angle.

Application

In this case, the two remotes angles are 107 and 33°, and the exterior angle is x. Now, all we have to do is just add 107 and 33 to get our answer.

Solution

107 + 33140°

Please please help please please help me please please help please please help me please please help please please help me please please help please please help me please please help please please help me please

Answers

Answer: 2+2= DA ROCK

Step-by-step explanation:

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YEHHHHHHHH

11 12 13
18
A local charity holds a carnival to raise money. In one
activity, participants make a $3 donation for a chance
to spin a wheel that has 10 spaces with the values, 0,
1, 2, 5, and 10. Whatever space it lands on, the
participant wins that value. Let X represent the value of
a random spin. The distribution is given in the table.
Value of a Spin
0
1
2
5
10
Probability
0.4 0.2
0.2
0.1
0.1
20
Which of the following is the correct interpretation of
P(X<5)?

Answers

The correct interpretation of the probability P(X < 5) is; 0.8

How to Solve Probability?

We are given the probability of the spin values are;

Probability of Spin Value of 0 = 0.4

Probability of Spin Value of 1 = 0.2

Probability of Spin Value of 2 = 0.2

Probability of Spin Value of 5 = 0.1

Probability of Spin Value of 10 = 0.1

P(X < 5) simply means the probability of getting a spin value less than 5. Thus;

P(X < 5) = P(0) + P(1) + P(2)

P(X < 5) = 0.4 + 0.2 + 0.2

P(X < 5) = 0.8

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Given that the line y=ax+b passes through the points A(0; 3) and B(-2;7), how do I find the values of a and b?

Answers

First you have find the slope (a) in order to find the value of the y intercept (b).

To compute the slope, you simply have to find the difference of y coordinates and divide them by the difference of x coordinates:

a = (y2-y1)/(x2-x1)
a = (7-3)/(-2–0)
a = 4/-2
a = -2

To compute the y intercept denoted by b, we substitute the value of a with -2 in the formula and choose any point (x,y) and substitute their values in the formula as well. Like so:

I choose point A:

3 = (-2)(0) + b
3 = b

A recipe for trail mix calls for 234
2
3
4
cups of peanuts, 123
1
2
3
cups of cashews, and 116
1
1
6
cups of almonds.
How many cups of nuts are used in all?

Answers

It would be three nuts
Other Questions
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