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
denpristay [2]
3 years ago
9

Use the quadratic formula to determine the exact solutions to the equation.

Mathematics
1 answer:
zmey [24]3 years ago
4 0
For this case we have the following equation:
 x ^ 2-2x-4 = 0
 We use the quadratic formula:
 x = (- b +/- root (b ^ 2 - 4 * a * c)) / (2 * a)
 Substituting values we have:
 x = (- (- 2) +/- root ((- 2) ^ 2 - 4 * (1) * (- 4))) / (2 * (1))
 Rewriting we have:
 x = (2 +/- root (4 + 16)) / 2
 x = (2 +/- root (20)) / 2
 x = (2 +/- root (4 * 5)) / 2
 x = (2 +/- 2raiz (5)) / 2
 x = (1 +/- root (5))
 The roots are:
 x1 = (1 + root (5))
 x2 = (1 - root (5))
 Answer:
 
x1 = (1 + root (5))
 
x2 = (1 - root (5))
You might be interested in
Factoring Polynomials: 6-13a+6a^2
Firlakuza [10]
(Factor by grouping 2-3a)(3-2a)
6 0
3 years ago
Solve for X. Type in your numerical answer only, do not type the degree symbol.
Alja [10]

Answer:

x = 4

Step-by-step explanation:

Due to the Consecutive Interior Angles rule, c + e = 180. So, 20x + 5 + 24x - 1 = 180.

If you solve, you will get x = 4

Work:

20x + 5 + 24x - 1 = 180 [Add like terms]

44x + 4 = 180 [Isolate the variable]

44x = 176 [Solve]

x = 4

5 0
4 years ago
The correlation between height and weight among men age 18-74 in the U.S. is about 0.40. Say whether each conclusion below follo
zzz [600]

Answer:

Options a, b, c are correct.

Step-by-step explanation:

First let's see the equation that governs the statement, which is the following:

r = \frac{cov (x, y)}{\sqrt{var(x) var (y)} }

Therefore, reading options a, b, c are correct.

Since from the formula we have the correlation coefficient of two variables x and y and here it shows us the correlation between x, y and y, x is the same.

 This means that the 0.4 correlation implies a moderate but positive relationship between the two variables.

 that is, the highest or lowest value of one variable implies a highest or lowest value of the other variable, respectively.

5 0
3 years ago
The label on a 1​-gallon jug of fruit juice states that the serving size is 8 oz. How many servings are in the​ jug?
Elodia [21]

Answer: 16 fl. oz.

Step-by-step explanation:

There are 128 fl. oz. in one gallon. Divide that by the serving size, 8 fl. oz., and you get 16.

4 0
3 years ago
How much are you paid weekly if your annual salary is $172,046? (gross)
Fiesta28 [93]

Answer:

$129,034.50

Step-by-step explanation:

i think this is right according to my calculations but i might be wrong

5 0
3 years ago
Other questions:
  • 35 people out of the 250 to whom the offer was made refused it. What percent refused it ?
    8·2 answers
  • A triangle is graphed on a coordinate grid and then translated 8 units
    12·2 answers
  • In a 30°-60°-90° triangle, the length of the hypotenuse is 30. Find the length of the shorter leg.
    13·2 answers
  • Which expression is equivalent to x ^2 – 8x + 16?
    9·1 answer
  • Which is lower?
    5·1 answer
  • +)) What is the surface area of this
    10·2 answers
  • (x^6x^2) i know this easy but plz help me​
    13·2 answers
  • First and Last Name 1. A waste oil tank is five feet wide by twenty feet long. The empty tank on your truck holds 5,000 gallons.
    12·1 answer
  • Ummmmm i need to get 5 brainliest
    14·1 answer
  • Can I have some help please​
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!