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
kompoz [17]
3 years ago
15

Anderson uses the discriminant to correctly find the number of real solutions of the quadratic equation x2 + 4x + 8 = 0. Which e

xplanation could Anderson provide?
Mathematics
1 answer:
astra-53 [7]3 years ago
8 0

Answer:

As the result of our discriminant is negative, this quadratic equation will have two complex solutions.

Step-by-step explanation:

Recall that the formula for a discriminant is b^2-4ac

From the given quadratic equation x^2+4x+8=0, we can gather the values of a, b, and c

a=1\\b=4\\c=8

Now, we can put these numbers into our discriminant formula

b^2-4ac\\\\(4)^2-4(1)(8)\\\\16-32\\\\-16

As the result of our discriminant is negative, this quadratic equation will have two complex solutions.

You might be interested in
The heights in inches of orangutans Are normally distributed with a population standard deviation of 3" and an unknown populatio
CaHeK987 [17]

Answer: The 95% confidence interval is approximately (55.57, 58.43)

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

Explanation:

At 95% confidence, the z critical value is about z = 1.960 which you find using a table or a calculator.

The sample size is n = 17

The sample mean is xbar = 57

The population standard deviation is sigma = 3

The lower bound of the confidence interval is

L = xbar - z*sigma/sqrt(n)

L = 57 - 1.960*3/sqrt(17)

L = 55.5738905247863

L = 55.57

The upper bound is

U = xbar + z*sigma/sqrt(n)

U = 57 + 1.960*3/sqrt(17)

U = 58.4261094752137

U = 58.43

Therefore the confidence interval (L, U) turns into (55.57, 58.43) which is approximate.

7 0
3 years ago
on monday, roger drove to work in 20 minutes. on tuesday, he averaged 15 miles per hour more, and it took him 6 minutes less to
ch4aika [34]
Let the distance to his office be x, then
On monday, speed = x/20 miles per minutes = 3x miles per hour
On tuesday, speed = (3x + 15) miles per hour
Time = distance / speed
(20 - 6)/60 hours = x/(3x + 15) hours
7/30 = x/(3x + 15)
7(3x + 15) = 30x
21x + 105 = 30x
30x - 21x = 105
9x = 105
x = 105/9 = 11.7 miles

Therfore he travels an average of 11.7 miles to work.
7 0
3 years ago
Find dy/dx for y - xy + 1 = x-1
zimovet [89]

Answer:

dx/dy = 1 -x / y + 1

5 0
3 years ago
How many questions can i ask brainly without position for community if i have 4000 points.
Masteriza [31]

Answer:

Depends on how much you offer for an answer. Offer 10 points and you'll be able to ask 400 questions. Offer 20 points, I think around 200 questions.

4 0
2 years ago
PLEASE HELP ASAP!<br> log base4(x^2+x+4)=2 solve for x
Ratling [72]

Step-by-step explanation:

multiply all the numbers by 4 I think except for the exponent

7 0
2 years ago
Read 2 more answers
Other questions:
  • What is a common multiple of 3,4,5 and 6?
    7·2 answers
  • What is 5 3/8 - 3 2/5 ( like fractions w a whole number )
    8·2 answers
  • the height, h cm, of a table is measured s 72cm correct to the nearest centimeters. conplete the following statement to show the
    11·1 answer
  • Find the value of x. A.180 B. 88 C. 92 D. 2 <br><br> Please help
    6·2 answers
  • How much pure water must be mixed with 10 liters of a 25% acid solution to reduce it to a 10% acid solution?
    10·1 answer
  • I don't know exactly what it mean by " Make a table for each equation, and find the values "y" by substituting 1,2,3,4, and 5 fo
    13·1 answer
  • For what value of x is the figure a rectangle?
    13·1 answer
  • PLEASE HELP!!! 30 POINTS AND I NEED IT URGENTLY! FAKE ANSWERS REPORTED
    15·1 answer
  • More Questions! Enjoy Answering!
    15·2 answers
  • There are 12 pounds of dirt to be shared equally among 8 flowerpots.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!