Mathematics High School

Give the values of a, b, and c from the standard form of the equation (2x + 1)(x - 2) = 0.
A. a = 3, b = 1, c = -1
B. a = 2, b = 5, c= -2
C. a = 2, b = -3,c = -2

Answers

Answer 1

Given:

The equation is:

[tex](2x+1)(x-2)=0[/tex]

To find:

The values of a, b and b from the standard form.

Solution:

The standard form of a quadratic equation is:

[tex]ax^2+bx+c=0[/tex]            ....(i)

We have,

[tex](2x+1)(x-2)=0[/tex]

In can be rewritten as

[tex]2x(x)+(2x)(-2)+(1)(x)+(1)(-2)=0[/tex]

[tex]2x^2-4x+x-2=0[/tex]

[tex]2x^2-3x-2=0[/tex]             ...(ii)

On comparing (i) and (ii), we get

[tex]a=2,b=-3,c=-2[/tex]

Therefore, the correct option is C.

Related Questions

find the unit price to the nearest tenth of one cent. 12-ounce can of cola for 60 cents

Answers

Answer:

1 ounce is 0.05

Step-by-step explanation:

Which is a number that can be written as a fraction in the form ?

Answers

Rational Numbers: Any number that can be written in fraction form is a rational number. This includes integers, terminating decimals, and repeating decimals as well as fractions. An integer can be written as a fraction simply by giving it a denominator of one, so any integer is a rational number.

Hope this helps!

Multiply. Write your answer as a fraction in simplest form.
−1(45)=
asap

Answers

Answer:

-9/20

put 45 over 100, then divide them both by 5.

What is the value of x?

Answers

Answer:

x = 64

Step-by-step explanation:

2x = 128

x = 64

Answer:

hi

Step-by-step explanation:

i think so

128⁰+2x⁰=180⁰

2x⁰=180⁰-128⁰

2x⁰=52⁰

x=52/2

x=26⁰

hope it helps

have a nice day


someone please help me

Answers

Answer:

A. 20ft

Step-by-step explanation:

Answer:

d. 98.5

Step-by-step explanation:

Triangles:

5 x 4 = 20/2 = 10

Circle:

5² x 3.14 = 78.5

Add both of them 98.5

Solve for x. round your answer to the nearest tenth
Trigonometry ​

Answers

Answer:

[tex]\displaystyle x \approx 16.5[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right  

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of Equality

Trigonometry

[Right Triangles Only] SOHCAHTOA[Right Triangles Only] tanθ = opposite over adjacent

Step-by-step explanation:

Step 1: Define

Angle θ = 70°

Opposite Leg = x

Adjacent Leg = 6

Step 2: Solve for x

Substitute in variables [tangent]:                                                                     [tex]\displaystyle tan70^\circ = \frac{x}{6}[/tex][Multiplication Property of Equality] Isolate x:                                                [tex]\displaystyle 6tan70^\circ = x[/tex]Rewrite:                                                                                                             [tex]\displaystyle x = 6tan70^\circ[/tex]Evaluate:                                                                                                           [tex]\displaystyle x = 16.4849[/tex]Round:                                                                                                               [tex]\displaystyle x \approx 16.5[/tex]

if a x b = a/b - 1, then 7 x 28

Answers

Answer:

Do you have answer choices. guess

Step-by-step explanation:

Divide.

389.5÷104
plz i need help

Answers

Answer:

The answer is 3.74519230769

HELLO!! I NEED HELP! Please show full Solutions. I will mark brainliest for the best answer. Thank you and god bless.

Answers

((x+2)(x+2))-((x-5)(1))=A

x^2+4x+4-x+5=A

x^2+3x+9=A

Jen collects stamps. The first month she added 25 stamps. Six months later, she doubled in number to a total of 98. How many stamps did she have to start her collection?

Answers

Answer:

49

Step-by-step explanation:

The cost of renting a car is represented by C=8.5h+25.5, where C is the cost in dollars and h is the number of hours rented.
If Peter rents a car and pays a cost of $85, how many hours did he rent it for?

Answers

he would have rented the car for 7 hours

............................

Answers

Answer:

Thaey are proportional

Step-by-step explanation:

PLZ HELP NEED BY TODAY!!

Answers

Step-by-step explanation:

Given 5x + 8 = 118 (vertically opposite angles)

[tex]5x + 8 = 118 \\ 5x = 118 - 8 \\ 5x = 110 \\ x = 110 \div 5 \\ = 22[/tex]

Please answer this and my recent questions if you can

Answers

Answer:

x is 15

Step-by-step explanation:

b is 75 hope this helps you

Which of these is an example of due process?

a search without good reason

a prejudiced jury

a cruel punishment

a fair trial

Answers

Answer:

A fair trial.

Answer:

Step-by-step explanation: a search without good reason

angle A and angle B are complementary angles. If m angle A = (6x – 8)° and m
angle B = (5x + 21)°, then find the measure of angle B.

Answers

Answer: B = 56 degrees

Step-by-step explanation: Complementary angles add up 90 degrees. So we will set both of the equations equal to 90 degrees and then solve from there.

6x+8+5x+21=90

1. Simplify 5x + 6x and 21 - 8

11x+13=90

 

2. Subtract 13 from both sides.

11x=90-13

 

3. Simplify 90-13 to 77.

11x=77  

4. Divide both sides by 11.

x = 77/11

​    

5. Simplify 77/11 to 7

 x=7

Now we have to take the value of x and substitute it back into B = (5x+21)

1. Substitute

B = (5(7)+21)

B = 35 +21

B = 56

HOPE THIS HELPS :)

Mio calculated the volume in this way : V = 12 • 5

Explain what the 12 and 5 represent in the figure.

Answers

5 represents the height and the 12 is from 4×3

find the missing side lenght of the triangle below

Answers

Answer:

12

Step-by-step explanation:

5^2 + x^2 = 13^2

x = 12

Answer:

12

Step-by-step explanation:

Use Pythagorean theorem

[tex]a^2 +b^2 =c^2[/tex]

c= always hypotenuse/ longest side/ side across from right angle = 13

a= 5

[tex]5^2+b^2=13^2[/tex]

[tex]25+b^2=169[/tex]

Subtract 25 from 169

[tex]b^2= 144[/tex]

Square root both sides

b= 12

--------

it's also a special triangle known as a 5, 12, 13 triangle

For a beverage, Lisa mixes cups of lemonade to cups of iced tea in a ratio of 2:5. Which of the following best describes the amount of lemonade to iced tea?

For every 2 cups of lemonade, there are 3 cups of iced tea.
For every 2 cups of lemonade, there are 5 cups of iced tea.
For every 3 cups of lemonade, there are 2 cups of iced tea.
For every 5 cups of lemonade, there are 2 cups of iced tea.

Answers

Answer:

Answer 2 would be true.

Step-by-step explanation:

Because our ratio is 2:5 (or 2 to 5 for easier understanding) we know that every 2 cups we use of lemonade, we pair with 5 cups of tea.

Answer:

The answer is B

Step-by-step explanation:

For every 2 cups of lemonade, there are 5 cups of iced tea.

Please help me do this

Answers

Answer:

∠ U = 60°

Step-by-step explanation:

The tangent- tangent angle U is half the difference of its intercepted arcs

minor arc VT = 120° , then

major arc VT = 360° - 120° = 240°

Then

∠ U = [tex]\frac{1}{2}[/tex] (240 - 120)° = [tex]\frac{1}{2}[/tex] × 120° = 60°

Ana spends 0.45 of her homework time reading. What is 0.45 as a percent? Explain.

Answers

Answer:

45%

Step-by-step explanation:

1.-28 -20 help me plsss

Answers

If you mea. 1 . -28 - 20 then the answer is going to be

[tex]1. - 48[/tex]

but if you mean -28 -20 the the answer is going to be

[tex] - 48[/tex]

The sophomore class needs a combined total of 216 medium and large t-shirts for field day. The number of medium t-shirts needed is three times the number of large t-shirts needed. Based on this information, would it be reasonable for the sophomore class to order 72 large t-shirts and 144 medium t-shirts? A. No, because the number of medium t-shirts is not 3 times the number of large t-shirts B. No, because the number of large t-shirts is not 3 times the number of medium t-shirts C. Yes, because the total number of t-shirts is 216 D. Yes, because the number of large t-shirts is of the total number of t-shirts​

Answers

It could be c as your answer

help help help help help
A=√18-√8+√50
Write A in the form m√2 where m is an integer​

Answers

Answer:

6√2

Step-by-step explanation:

A=3√2-2√2+5√2

A=6√2

Answer:

6√2

Step-by-step explanation:

A=√18-√8+√50 = √9√2 - √4√2 + √2√25, or A = (√2)(3 - 2 + 5) = 6√2


Reese is selling lemonade at the parade. He gets to keep 50% of the money he collects. A large lemonade is
$5.00 and a small lemonade is $2.00.

The expression represents 50%
of the money he collects

.0.50(5l + 2s)

Use the Distributive Property to expand the expression.

Answers

Answer:

.5(5I)+.5(2s)

Step-by-step explanation:

Find x. PQR = MNR ...............

Answers

Answer:

x = 55

Step-by-step explanation:

<QRP = <NRM because of vertical angles

To find <NRM:

x + 35 + 90 = 180

x + 125 = 180

x = 55

<NRM = 55

<QRP or x = 55

Can anyone help me on this question???

Answers

Answer:

Step-by-step explanation:

Answer is B , only you can decide how to spend your money.

please help me i don’t know te anser

Answers

A=b h................

Answer:

A = 20

Step-by-step explanation:

A = bh

b = 4

h = 5

4 × 5 = 20

What is the height of the cylinder in the diagram? Round your answer to the nearest whole number.

Answers

Answer:

8 is the height

Step-by-step explanation:

please mark this answer as brainlest

-
Finding slope given two points on the line
Find the slope of the line passing through the points (-4, 6) and (3, -8).

Answers

slope(m) = -2 hope this helps

Answer:

The slope is -2

Step-by-step explanation:

Hi there!

We are given the points (-4, 6) and (3, -8)

We want to find the slope (m) of the line that passes through these points

We can use the formula [tex]\frac{y_2-y_1}{x_2-x_1}[/tex] to calculate the slope, where [tex](x_1, y_1)[/tex] and [tex](x_2, y_2)[/tex] are points

We have everything we need to find the slope, but let's label the values of the points to avoid confusion and mistakes.

[tex]x_1=-4\\y_1=6\\x_2=3\\y_2=-8[/tex]

Now substitute into the formula

m=[tex]\frac{y_2-y_1}{x_2-x_1}[/tex]

m=[tex]\frac{-8-6}{3--4}[/tex]

Simplify:

m=[tex]\frac{-8-6}{3+4}[/tex]

m=[tex]\frac{-14}{7}[/tex]

Divide

m = -2

The slope of the line is -2

Hope this helps!


See more on calculating slope from 2 points here:  https://brainly.com/question/26738734

Other Questions
Estimados estudiantes,Soy la seora Diaz y soy la maestra. Necesitan una mochila, cinco cuadernos, plumas,lpices y una calculadora.Las clases son difciles pero interesantes. Tienen que estudiar mucho. Todos los dastenemos las clases de ingls, espaol, historia y ciencias. Tambin vamos a la bibliotecalos lunes y los viernes y vamos al gimnasio los martes y los jueves. Vamos a la cafeteratodos los das a las doce y media.Estoy muy emocionada. Hasta luego,Seora DazTor FLos estudiantes van al gimnasio los viernes.TrueO False If y varies directly with n and inversely with m, and y = 3 when n = 6 and m = 10, then what is y when n = 12 and m = 3?A.45B.4/5C.5D.20 someone plzz help meeeee thank youuu A circle has a radius of 11 meters. What is the area of the circle? Read the following statements and decide which part of the statement is reasoning and which part of the statement is evidence.Available Options (4 are evidence & 4 are reasoning. Put the pairs together.) :The basketball player had to run extra laps at practice today.The bridge has been flooded all week.Toy sales drop after the holidays.We know that fewer people are shopping during that time.After, they realized that the player was out of bounds.She is probably very tired tonight.It hasnt rained this much in the city since 2011.They rewatched the tape of the touchdown. If Amy bought 2 CDs for $14.00 each, a DVD for $24.99, and a videogame for $37.50, how much change would she get back from a $100 bill? Bella Donna Company has 100,000 shares of $2 par common stock issued and outstanding as of January 1, 2018. The shares were originally issued for $8 per share. On February 3, 2018, Bella Donna repurchased 3,590 shares at $6 per share for the purposes of retiring them. What will be the balance in Paid in capital in excess of par after February 3rd transaction? Anna can buy 3 sweatshirts for a total of $45. How much would it cost if she were to buy 5 sweatshirts at the same price? Without solving, identify whether each of the following equations has a unique solution, no solution, or infinitely many solutions.2(x3)=10x68x1 solutionNo SolutionInfinite Solutions Alex is an avid ornithologist and bird-watcher. He received a tweet from a colleague that the "pink-tufted warbler," a rare and exotic bird, was sighted only ten miles away from his workplace in a remote area. Disregarding the signs indicating "Private Road" and "Private Property", Alex drives to the site. A polynomal of degree of 2 that has zeros -4 and 2 is Choose the best translation to the following sentence.Its around here.-Est por all-Est por aqu-Est por todos lados-Est por supuesto What is the difference between phenol and dettol? Assume that BC is tangent to circle A. Find the value of x. Round your answer to the nearest tenth The graph of a quadratic function with vertex (1,-3) is shown In the figure below . Find the domain and the range What does the metaphor in the sentence below emphasize about the plane?*The plane slipped through the night, a silvery arrow bursting through the moonlit clouds.*a. Everyone on the plane is asleep. b. The plane is painted silver.c. Moonlight is shining on the plane. d. The plane is moving quietly at a highspeed. Which of these is the most likely reason that a population might crash? What is the area of the base? Can someone help me? Becks? At December 31, 2021 and 2020, P Co. had 58,000 shares of common stock and 5,800 shares of 5%, $100 par value cumulative preferred stock outstanding. No dividends were declared on either the preferred or common stock in 2021 or 2020. Net income for 2021 was $620,000. For 2021, basic earnings per common share amounted to: (Round your answer to 2 decimal places.)