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
Goryan [66]
3 years ago
14

Use the quadratic formula to solve x² + 8x + 9 = 0. What are the solutions to the equ ation? Round irrational solutions to the n

earest tenth.
A. x = 1 and x=−9
B. X=-1and x=−8
C. x=−1.2 and X= -6.8
D. x=−6.6 and x=−1.4
ANSWER ASAP LIKE RIGHT NOW
Mathematics
2 answers:
Ugo [173]3 years ago
5 0
First off, this is the quadratic formula:
x= -b +/- √b²-4ac
           2a
(there's a division sign between the 2a)
Next, you would substitute each of the numbers in the equation for a, b, or c. For a, you would put it as 1. For b, you would say 8. For c you would say 9. Hopefully you get the pattern.
Then you plug in the numbers.
x=-8+/-√8²-4(1) (9)
           2(1)
Then you would simplify.
8²=64
 -4(1)(9)=-36.
64-36=28
√28≈5.3
So, you would end with 
x=-8+/-5.3
            2
Next, start with addition. Add -5.3 to the -8. That is -13.3. -13.3/2=-6.65. That is the first part of the answer.
Next, subtract. -8--5.3=-2.7. -2.7/2=-1.35.
The answers to problem is -6.65 and -1.35. Assuming your rounding your answers to the nearest tenth, your answer will be d. This is hard to explain in text, but I hope this makes sense.
IrinaVladis [17]3 years ago
3 0
It has to be d when you do the quadratic equation
You might be interested in
What rule would you use to translate a triangle 4 units to the right?
Novay_Z [31]

Answer:

here is what i found also you could of looked it up

Step-by-step explanation:

(x,y)→(x+4,y)

6 0
3 years ago
I am a 2 dimensional shape that has four sides. I have four 90 degree angles. I have two sets of parallel lines. I also have two
Ray Of Light [21]
You are a rhombus sometimes although not correctly referred to as a diamond 
7 0
3 years ago
+
My name is Ann [436]

Answer:

step 1

Step-by-step explanation:

7 0
3 years ago
I need help not good at graphs
Charra [1.4K]

Answer:

a, b

Step-by-step explanation:

a and b  cause  all  the data are  not in a form of a line

6 0
3 years ago
Read 2 more answers
Please Help I will mark as brainliest
zhannawk [14.2K]

Answer:

A. True

B. True

C. False

D. True

Step-by-step explanation:

A) To find the probability of the letters spelling CAT go to the letter C, then A, and finally T. there is only one sequence that does this, so the numerator will be 1. There are 6 outcomes overall, so the denominator will be 6. The probability of the letters spelling CAT would be 1/6. The answer is true.

B) To find the probability of T being the first letter go to the letter T. All sequences after the letter T will all be included in the answer. TAC and TCA are both possible solutions, this means there are 2 correct outcomes, so 2 is the numerator. Again, there are 6 outcomes overall, so the denominator will be 6. The probability of T being the first letter is 2/6, which is equal to 1/3. The answer is true.

C) To find the probability of A being the first letter go to the letter A. All sequences after the letter A will all be included in the answer. ACT and ATC are both possible solutions, this mean there are 2 correct outcomes, so 2 is the numerator. Again, there are 6 outcomes overall, so the denominator will be 6. The probability of A being the first letter is 2/6. The answer is false.

D) To find how many total outcomes are possible go to the tree diagram and look to the far right. Go down each of the rows to find all of the outcomes, there is T,C,T,A,C, and A. That means there are six possible outcomes. The answer is true.

7 0
3 years ago
Other questions:
  • Find the total cost of a spa treatment of $42 including 6% sales tax and 20% tip
    8·1 answer
  • Why is a rational number?
    13·2 answers
  • £2500 is invested at 3.6% compound interest per annum.
    5·1 answer
  • Trying to solve y + 4 = -5/3(x-5) Do I get y = -5/3x + 25/3 or do I multiply everything by 3 to get -15x + 21? Provide how.
    14·1 answer
  • Simpify the expression.<br>5+4z-2z<br><br>Simpilfied expression ​
    8·2 answers
  • What is the result of 36 divided by 9? Use the number line to find the answer.
    8·1 answer
  • What is another expression for 52+24?
    15·2 answers
  • Find the surface area of a triangular pyramid.
    11·1 answer
  • PLEASE HELPP Im doing delta math: A group of friends wants to go to the amusement park. They have $363 to spend on parking and a
    15·1 answer
  • Cal can make 6 bracelets in 2 hours. How many bracelets can he make in 3 hours?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!