1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
DochEvi [55]
3 years ago
5

Select the two values of x that are roots of this equation x^2+3x-3=0 Apex

Mathematics
2 answers:
andrew-mc [135]3 years ago
8 0

Answer:

C, and D are both roots of this equation

allochka39001 [22]3 years ago
5 0

Answer:

The two values of x that are roots are:

x_{1} = \frac{-3 + \sqrt{21} }{2}

x_{2} = \frac{-3 - \sqrt{21} }{2}

Step-by-step explanation:

A cuadratic function has the form ax^{2} + bx +c = 0

To calculate the roots of the cuadratic equation x^{2} + 3x -3 = 0 you have to solve the formula:

x = \frac{-b}{2a} ±\frac{\sqrt{b^{2} -4ac} }{2a}

In this case, a =1, b=3 and c= -3

Replacing the values of a,b and c in the formula:

x = \frac{-3}{(2)(1)} ± \frac{\sqrt{(3)^{2} - (4)(1)(-3) } }{(2)(1)}

Solving the mathematic operations:

x = \frac{-3}{2} ± \frac{\sqrt{9 + 12 } }{2}

The two roots are:

x_{1} = \frac{-3 + \sqrt{21} }{2}

x_{2} = \frac{-3 - \sqrt{21} }{2}

You might be interested in
The top of a rectangular table has an area of 11 square feet. It has a length that is 3.5 feet more than the width. Find the dim
pashok25 [27]

Step-by-step explanation:

If we let the width be w, then the length is w+3.5.

This means that w(w+3.5)=11

w^2 + 3.5w - 11 = 0

2w^2 + 7w - 22 = 0 (multiply both sides by 2)

(2w+11)(w-2)=0

w = -11/2 or w = 2 (disregard w = -11/2 as distance is positive)

This means that w=2, and thus the length is 2+3.5=5.5

3 0
2 years ago
PLEASE HELP ME!!!!<br><br><br> Please show work thank you!
Vaselesa [24]

Answer:

use khan academy

Step-by-step explanation:

khanacedemy.com

dont cheat dude

7 0
3 years ago
Li...
faltersainse [42]

The price of one vegetarian special lunch is $7 and price of one chicken special lunch is $8.

Step-by-step explanation:

Let,

Price of one vegetarian special lunch = x

Price of one chicken special lunch = y

According to given statement;

21x+40y=467      Eqn 1

28x+36y=484     Eqn 2

Multiplying Eqn 1 by 28

28(21x+40y=467)\\588x+1120y=13076\ \ \ Eqn\ 3

Multiplying Eqn 2 by 21

21(28x+36y=484)\\588x+756y=10164\ \ \ Eqn\ 4

Subtracting Eqn 4 from Eqn 3

(588x+1120y)-(588x+756y)=13076-10164\\588x+1120y-588x-756y=2912\\364y=2912

Dividing both sides by 364

\frac{364y}{364}=\frac{2912}{364}\\y=8

Putting y=8 in Eqn 1

21x+40(8)=467\\21x+320=467\\21x=467-320\\21x=147

Dividing both sides by 21

\frac{21x}{21}=\frac{147}{21}\\x=7

The price of one vegetarian special lunch is $7 and price of one chicken special lunch is $8.

Keywords: linear equation, elimination method

Learn more about elimination method at:

  • brainly.com/question/10081622
  • brainly.com/question/10341324

#LearnwithBrainly

5 0
3 years ago
Perform the indicated operation.<br> (5 - 2122
LUCKY_DIMON [66]

Answer:

5 - 2122 = -2,117

Step-by-step explanation:

When you're not sure how to add or subtract, you should probably just use a calculator.

-2,122 + 5 = -2,117

4 0
3 years ago
Will give brainliest!!!
Igoryamba

y = 80x - 60

Answer is B. y = 80x - 60

Double check:

When x = 1, y = 80(1) - 20 = 80 -60 = 20

When x = 2, y = 80(2) - 20 = 160 -60 = 100

When x = 3, y = 80(3) - 20 = 240 -60 = 180

When x = 4, y = 80(4) - 20 = 320 -60 = 260

When x = 5, y = 80(5) - 20 = 400 -60 = 340

6 0
3 years ago
Other questions:
  • PLEASE HELP <br> **ONLY MATH HELPERS**
    10·1 answer
  • A toxic radioactive substance with a density of 9 milligrams per square centimeter is detected in the ventilating ducts of a nuc
    15·2 answers
  • There are 180 cars in a parking lot. 45% are blue . How many blue cars are there?
    11·2 answers
  •  In the first week of​ July, a record 1040 people went to the local swimming pool. In the second​ week, 110 fewer people went to
    5·1 answer
  • Verify which of the following are identities.
    11·1 answer
  • Help me with ixl please
    14·1 answer
  • An equation has solutions of m = –5 and m = 9.
    15·1 answer
  • X - 10.2 &gt; 5.3 <br> PLSSSSSS HELP ME SOLVE THIS PROBLEM!!!!...
    7·1 answer
  • 4/5 + 1/3 simplified
    15·1 answer
  • Answer these 2 questions please
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!