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
Best answer gets brainliest<br> y=0<br> 1. y=(x³+12x²+47x+60)<br><br> 2. y=(12x²- 25x + 12)
kotegsom [21]

Answer:

1. x =−3, -4, -5  

2. x= 3/4, 1 1/3

6 0
2 years ago
For the pair of similar solids, find the value of the variable.
serg [7]

Answer:

2cm..................

4 0
2 years ago
Read 2 more answers
Samuel's car usually takes about 12.5 gallons of gas to fill it up when it's empty while driving through Canada Samuel notice th
nika2105 [10]

Answer: 47.4 liters

Step-by-step explanation:

From the question, we are informed that Samuel's car usually takes about 12.5 gallons of gas to fill it up when it's empty and while in Canada, he noticed that one liter is equivalent to 0.264 gallons.

The number of liters it'll take to fill Samuels car will be:

= 12.5/0.264

= 47.4 litres

7 0
3 years ago
Which expression represents the following calculation?
mrs_skeptik [129]

Answer:

7.4 x (87-24)

Step-by-step explanation:

The translation is that you multiply the difference of two numbers. So you must get the difference first, that's why you put parenthesis around 87-24. Your answers are sideways and are hard to read, so I'll just give you the correct answer without the answer choice.

5 0
2 years ago
Read 2 more answers
Determine the intercepts of the line <br> x-intercept _,_<br> y- intercept _,_<br> HELP ASAP
frutty [35]
X-intercept: (7,0)
y-intercept: (0,2)
3 0
3 years ago
Other questions:
  • How do you interpret algebraic expressions in terms of their context
    8·2 answers
  • The area of a circle with a diameter of 240 mm is?
    7·2 answers
  • A researcher claims that the mean cost of raising a child from birth to age 2 by husband­wife families in the U.S. is $13,960. A
    5·1 answer
  • In the function y = 10.00x + 35, y represents the cost of cabin lodging per occupant and x represents the number of occupants. H
    9·1 answer
  • Find the regular price. Round to the nearest cent . Sales price is 56.78 percent discount is 40%
    11·1 answer
  • The Gonzalez are buying a house that costs $375,000 and need to 15% of the price for a down payment. How much money do they need
    6·1 answer
  • Which of the following equations is an example of the Associative Property of Addition?
    10·2 answers
  • A company’s stock was selling at $28 a share.A month later , it was selling at $21 a share.What is the percent loss
    9·1 answer
  • Can some help me for number 25 where it says Evaluate this simplified polynomial for a=4 and b =-1. I don't understand it correc
    15·2 answers
  • Which of the following describes the domain of y= tan x, where n is any
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!