Please help!!!! The roots of x^2-2x-2=0 are A.1+square root of 3 B.1+square root of 12 or C.No real roots
Answers
Answer:
A
Step-by-step explanation:
We have the equation:
[tex]x^2-2x-2=0[/tex]
We can use the quadratic formula. In this case, a = 1, b = -2, and c = -2. Hence:
[tex]\displaystyle x=\frac{-(-2)\pm\sqrt{(-2)^2-4(1)(-2)}}{2(1)}[/tex]
Evaluate:
[tex]\displaystyle x=\frac{2\pm\sqrt{12}}{2}[/tex]
Simplify:
[tex]\sqrt{12}=\sqrt{4}\cdot\sqrt{3}=2\sqrt{3}[/tex]
Hence:
[tex]\displaystyle x=\frac{2\pm2\sqrt{3}}{2}[/tex]
Divide:
[tex]x=1\pm\sqrt3[/tex]
The correct answer is A.
Related Questions
Please help complete the statement
Answers
Answer:
sin2θ = - [tex]\frac{24}{25}[/tex]
Step-by-step explanation:
Given
cosθ = [tex]\frac{3}{5}[/tex] = [tex]\frac{adjacent}{hypotenuse}[/tex] and in fourth quadrant
Then this is a 3- 4- 5 triangle with opposite side = 4
sinθ < 0 in fourth quadrant, then
sinθ = - [tex]\frac{opposite}{hypotenuse}[/tex] = - [tex]\frac{4}{5}[/tex]
Using the double angle identity for sine
sin2θ = 2sinθcosθ
= 2 × - [tex]\frac{4}{5}[/tex] × [tex]\frac{3}{5}[/tex] = - [tex]\frac{24}{25}[/tex]
Translate this sentence into an equation.
The sum of 23 and Delia's score is 71.
Use the variable d to represent Delia's score.
Answers
need some help please
Answers
Answer:
Is undefined slope
have a nice day!
Answer:
Omg I am sooo sorry Chloe I never forgot you I just got in a lot of trouble and I didn’t want you to be put through that
You have no idea how much I miss you please respond when you see this
solve : 3x - 3 = 2x
if you can show workings that would be great thank you !
Answers
Answer:
3
Step-by-step explanation:
3x-3=2x
3x-2x=3
x=3
Answer:
x=3
Step-by-step explanation:
3x - 3 = 2x
-3x -3x
-3 = -x
The x cannot be a negative so you divide both sides by -1 and then the answer becomes x=3
The sum of the measures of 2 angles is 90o. Angle C is 34o. Angle G is (3x-4)o. What is the value of x?
Answer: x =
a
13 in2
b
25 in2
c
50 in2
d
200 in2
Answers
Answer:
d if "in2" means /2
Step-by-step explanation:
3x-4=90-34
Lilly bought 4 pairs of blue jeans for $40. How much money did she pay the clerk for each pair of jeans?
$ -10
$ 10
$ -160
$ 160
Answers
Answer:
$10
Step-by-step explanation:
Answer:
10 in the answer
Step-by-step explanation:
10 is the answer
Arkadaşlar yardım edin EN İYİ SEÇERİM
Answers
Answer:
seviye 2
a=3 b=3
c=5 d= -1
seviye 3
a x=5 b x=15
c x=15 d x=9
Write the equation that expresses the table below.
Answers
Answer:
10x=y
Step-by-step explanation:
Divide your outputs by your inputs. In other words, divide 20 by 2, 50 by 5, and 70 by 7. These all equal 10. Therefore, 10 times x will equal y.
What is the area of this square?
Answers
Answer:
4x4x4x4=256
Step-by-step explanation:
hope this helps
Answer:
20 = white square in the middle
Step-by-step explanation:
The whole square itself (including the blue parts) is 36 because 6 x 6 = 36
Please Help!! I will give Brianliest to the correct answer!!!!
Write an equivalent expression.
-3(5 + 7g)
Choose the correct answer below.
A. -3(5 +79) = 7g – 15
B. - 3(5+7g) = - 15 - 21g
C. -3(5 + 7g) = - 15 + 7g
D. -3(5 + 7g) = -3-219
thank you so much!
Answers
Answer:
It is Option B
Hope it helps
Which of the following statements is not true
Answers
Answer:
(AB) has the same slope as (AC) is the wrong statement...........
I hope this helps you
if you buy three stickers you get a 75% discount on third sticker if one sticker cost $.40 how much will three stickers cost you
Answers
Answer:
$1.10
Step-by-step explanation:
The first two stickers cost $0.8. The thrird one will cost 75% of the cost of one sticker. To find the answer, you multiply 0.75 (0.75 is 75% as a decimal) by 0.4 to get 0.3. $0.3 plus $0.8 equals $1.10.
x - 0.25x = 0.75x
what statement can match that equation ?
example: decrease a number by 75% is the same as multiplying by 45%
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como se convierte una fracción a decimal
Answers
Answer:
Para convertir una fracción en un decimal, dividimos el numerador entre el denominador. Si tenemos un número mixto, el número natural se mantiene a la izquierda del punto decimal.
Answer:
Aqui esta la respuesta
Step-by-step explanation:
The line in a fraction that separates the numerator and denominator can be rewritten using the division symbol. So, to convert a fraction to a decimal, divide the numerator by the denominator. If required, you can use a calculator to do this. This will give us our answer as a decimal.
A fraction is made up of two parts: a numerator and a denominator. It is used to represent how many parts we have out of the total number of parts.We can use bar models to represent the conversion from fractions to decimals.La línea de una fracción que separa el numerador y el denominador se puede reescribir usando el símbolo de división. Entonces, para convertir una fracción en decimal, divide el numerador por el denominador. Si es necesario, puede usar una calculadora para hacer esto. Esto nos dará nuestra respuesta como decimal.
Una fracción se compone de dos partes: un numerador y un denominador. Se usa para representar cuántas partes tenemos del número total de partes.Podemos usar modelos de barras para representar la conversión de fracciones a decimales.Hope this helps
Espero que esto ayude
if you don't mind me putting it in both languages
Graph the points:
(-1, -2); (0 -1), (1, 0)
• What is the fourth point?
HELP PLZZ I'm abouta fail this grade and I cant
Answers
Answer:
(2,1)
Step-by-step explanation:
bro if im wrong blame me-- but yeah
For what values of x is the expression below defined? x + 3 / 1 - x
Answers
Answer:
3
Step-by-step explanation:
Answer:
Hello! The answer is -3 ≤ x < 1
Hope this helps :)
Determine the value of X
Answers
Answer:75
Step-by-step explanation: 50+55 =105,
180-105=75
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Answer:
x = 105°
Step-by-step explanation:
First to get to know the last angle of the triangle:
[tex]55 + 50 + x = 180 \\ x = 75[/tex]
The last angle of the triangle is 75°
To get the opposite angle we take 180° (the full angle) minus 75° which results in 105°
Solve.
show all work
-2x+10=20
Answers
Answer:
x= -5
Step-by-step explanation:
-2x+10=20
-2x+10-10=20-10
-2x=10
-2x/-2=10/-2
x = -5
The answer is -5
This is how you do it:
what is f(x)=2(3)^x?
Answers
Answer:
This is an exponential function
Step-by-step explanation:
f(x)=2(3)^x is one example of the exponential function. Since f(0) = 2(1) = 2, the y-intercept is (0, 2). The x-axis is the horizontal asymptote. The graph begins in Quadrant II, passes through (0, 2) and continues to increase, faster and faster, in Quadrant I. Next time, please be more specific about what you'd like to know.
What is the length of Ac? Round to the nearest tenth.
Answers
Given:
The figure of a right angle triangle.
To find:
The length of the line segment AC.
Solution:
In a right angle triangle,
[tex]\tan \theta=\dfrac{Opposite}{Adjacent}[/tex]
In the given right triangle ABC,
[tex]\tan (A)=\dfrac{BC}{AC}[/tex]
[tex]\tan (55^\circ)=\dfrac{BC}{AC}[/tex]
[tex]\tan (55^\circ)=\dfrac{15}{AC}[/tex]
[tex]AC=\dfrac{15}{\tan (55^\circ)}[/tex]
On further simplification, we get
[tex]AC=\dfrac{15}{1.428148}[/tex]
[tex]AC=10.503113[/tex]
[tex]AC\approx 10.5[/tex]
The length of side AC is equal to 10.5 m .
Therefore, the correct option is A.
A large hose can fill 7/8 of a water tank in one hour. A small hose
can fill 3/4 of a water tank in one hour. How much more of a water
tank can the large hose fill in one hour than the small hose?
Answers
Answer: 1/8
Step-by-step explanation:
From the question, we are informed that a large hose can fill 7/8 of a water tank in one hour while a small hose
can fill 3/4 of a water tank in one hour.
To get the solution to the question above, we have to find the difference between the amount if water filled by the large and the smaller hose. This will be:
= 7/8 - 3/4
= 7/8 - 6/8
= 1/8
what is 7 over 5 - 1
Answers
Answer:
2/5
Step-by-step explanation:
I assume you mean 7/5 - 1
In that case you would need to make 1 a fraction that has a common denominator with 7/5.
7/5 - 5/5 = 2/5
What is 9876 times 567
Answers
Answer:
5599692
Step-by-step explanation:
Simply do the multiplication out, then you should get the answer:
5599692
Answer:5599692
Step-by-step explanation:
just multy and you will get it
PLEASE HELP WILL GIVE OUT BRAINLEYST
MATHH PEOPLE HELP
Answers
Answer its 82 i added the cm
Q'R'
is a translation of
QR
. Write the translation rule.
Answers
Two people push against a 113 kg refrigerator in opposite directions with forces of 140 N
and 190 N, respectively.
What would be the resulting acceleration of the refrigerator
Answers
Answer:
Results in 27 N in the direction of the person pushing with 140 N
Step-by-step explanation:
140-113=27 N
Sorry, if I did wrong, I'm in middle school so its a bit ahrd.
write the equation of each line in slope-intercept form
Answers
Answer:
the 2nd one is -2/2 so the equation would be y=-2/2x+4 the 1st it's kinda blurry it fades away.... but for the 1st one the y- int. is 2 so it would be
y= slope x +2
PLEASE HELPPPPPPPPPPPPPPPPPPPPPPPpp
Answers
Answer:
12-2=10
Step-by-step explanation:
Your welcome! :D
PLS HURRY!!!!!!!!! YOU WILL BE THE BRAINLIEST.
Which data collections show bias? Check all that apply.
An English teacher polls the top-ten most avid readers to find their favorite books.
An insurance company polls drivers of sports cars to find their average number of tickets.
A restaurant manager surveys every tenth customer for one week.
An assistant principal surveys each student who is sent for discipline.
A fundraiser organizer draws five names from a hat that contains all entries.
Answers
Answer:
The English teacher, restaurant manager, and assistant principal show bias.
Step-by-step explanation:
The data collection for each survey is only gathering data from one small portion of the total population that could be surveyed.
Answer:
A, B, D
Step-by-step explanation
I got it right on the quiz on Edge 2021.
HELP ME ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!!
See question attached
Answers
Answer:
option A
Step-by-step explanation:
the ans is 7
it has factors 1 nd 7
Answer:
A - 7
Hope it helps