Quadratic formula is the formula which is used to find the roots of a quadratic equation.
The error which Zacharias made is, the 2 in the numerator should be –2. Thus the option 3 is the correct option.
What is quadratic formula?Quadratic formula is the formula which is used to find the roots of a quadratic equation.
The standard form of the quadratic equation is,
[tex]ax^2+bx+c[/tex]
For the above equation the quadratic formula can be given as,
[tex]x=\dfrac{-b\pm\sqrt{b^2-4ac} }{2a}[/tex]
Given information-
The equation given in the problem is-
[tex]0=-2x^2+5x-3[/tex]
Rewrite the equation as,
[tex]-2x^2+5x-3=0[/tex]
Compare it with the standard form of the quadratic equation, we get,
[tex]a=-2\\b=5\\c=-3[/tex]
Put the values in the quadratic formula,
[tex]x=\dfrac{-(5)\pm\sqrt{(-5)^2-4\times(-2)\times(-3)} }{2(-2)}\\x=\dfrac{-5\pm\sqrt{5^2-4\times(-2)\times(-3)} }{2(-2)}\\[/tex]
As the value of b is -5 which is in the power of square. The even power omit the negative sign.
On comparing we can conclude that,
The error which Zacharias made is, the 2 in the numerator should be –2. Thus the option 3 is the correct option.
Learn more about the quadratic formula here;
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Answer:
C. or 3.
Step-by-step explanation:
The 2 in the numerator should be –2.
12 divided by 5/6 equals what ?
Answer:
Exact Form:
72/5
Decimal Form:
14.4
Mixed Number Form:
14 2/5
Step-by-step explanation:
yea thats what i got
What is x for this equation 200.89x*98108=27302347?
Please Help It's For Math Class It's due it 10 mins
simplify these expresions pls
1. 2(3+d-1)
2. 5(k+4)-2k
Answer:
1. 4+2d
2. 3k+20
Step-by-step explanation:
Wafa is in a jewelry making class at
of triangular earrings from a metal circle. She
knows that AC is 115°. If she wants to cut two
equal parts off so that AB = BC, what is x?
HELP ME PLSSS
PLS HELP DUE TONIGHT!!! 35 POINTS!!
Answer :
A) y = 7x + 4
Step-by-step explanation:
we need to see the equations 1 by 1
instead of y and x we need to put the value given
I am taking the last x and yes values as they are small numbers and will be easy to calculate
x = -1
y = -3
placing the values in equation :
A) y = 7x + 4
-3 = 7 × -1 + 4
-3 = -7 + 4
-3 = -3
So we got the answer same ! so the correct answer will be A) y = 7x + 4
let's check other one too to confirm overselves
b) y = 4x + 7
-3 = 4 × -1 + 7
-3 = -4 + 7
-3 = 3 NOT AN ANSWER
c-1 1/4>-2 1/2 please help me
I believe your answer should be C > -5/4
A book contains 110 pages. Pages 17 to 26 contains pictures. How many pages do not contain pictures?
Answer:
100 don't contain pictures
Step-by-step explanation:
How many solutions does this equation have?
–2m − 2m = –4m
Answer:
Infinitely many
Step-by-step explanation:
[tex]-2m-2m=-4m[/tex]
Combine −2m and −2m to get −4m.
[tex]-4m=-4m[/tex]
Add 4m to both sides.
[tex]-4m+4m=0[/tex]
Combine −4m and 4m to get 0.
0=0
Compare 0 and 0.
True
This is true for any m.
m∈R\
Hope this helps! Brainliest would be much appreciated! Have a great day! :)
Divide 60 in the ratio 3:9
so the total number is 60, and we can just divide it by (3+9) and then distribute accordingly.
[tex]\stackrel{ratio~3:9}{60}\qquad \qquad 3\cdot \frac{60}{3+9}~~ :~~9\cdot \frac{60}{3+9}\implies 3\cdot \frac{60}{12}~~ :~~9\cdot \frac{60}{12} \\\\\\ 3(5)~~ : ~~9(5)\implies 15~~:~~45[/tex]
Select the correct answer.
What is the value of y in the triangle?
a 30-60-90 triangle with long leg length y and hypotenuse length 6
A.
B.
C.
D.
Answer: In a 30-60-90 triangle the side opposite the 30 degree angle is half the length of the hypotenuse. The shorter leg is the side opposite the 30 degree angle, therefore the shorter leg = 30/2 = 15
By the Pythagorean theorem
the longer leg = √(30² - 15²) = √(900-225) = √675 = 15√3 ≈ 25.98 units
Answer please i will give brainliest
Step-by-step explanation:
a.
simply add both equations
x + y = 2
-3x - y = 5
----------------
-2x + 0 = 7
x = -7/2
x + y = 2
-7/2 + y = 2
y = 2 + 7/2 = 4/2 + 7/2 = 11/2
b.
1/2 x + 2y = -13
x - 4y = 8
first multiply the first equating by 2
x + 4y = -26
x - 4y = 8
--------------------
2x + 0 = -18
x = -18/2 = -9
x - 4y = 8
-9 - 4y = 8
-4y = 17
y = -17/4
what information is missing
rainfall in mm
Step-by-step explanation:
we cant count water in inches
1. In Hypothetical Town, the probability that a teenager in a household has an Android device is 0.67 and the probably that a teenager in a household owns an Apple device is 0.33. A family has two teenagers. If X is the number of teenagers who own an Apple device, find the probability that the family has 0, 1, or 2 teenagers who own an Apple device.
(a) Draw a tree diagram showing the possibilities for each outcome.
(b) Create the binomial distribution table for P(X).
Show all your work.
Please help me
The probability that the family has 0 teenagers who own an Apple device is 44.44%, the probability that it has 1 is 44.44% and the probability that it has 2 is 11.11%.
ProbabilitiesGiven that in Hypothetical Town, the probability that a teenager in a household has an Android device is 0.67 and the probability that a teenager in a household owns an Apple device is 0.33, to determine, if a family has two teenagers, the probability that the family has 0, 1, or 2 teenagers who own an Apple device, the following calculation must be performed:
0.67 x 0.67 = 0.440.67 x 0.33 x 2 = 0.440.33 x 0.33 = 0.110.44 + 0.44 + 0.11 = 0.99Therefore, the probability that the family has 0 teenagers who own an Apple device is 44.44%, the probability that it has 1 is 44.44% and the probability that it has 2 is 11.11%.
Learn more about probabilities in https://brainly.com/question/795909
Pls answer 2 people or more
In a probability experiment, Karen flipped a coin 77 times. The coin landed on heads 33 times what percentage of the coin flips
resulted in tails? Round to the nearest percent
A. 57%
B. 64%
C. 61%
OD 43%
Pleasee help me with this thank you!
Answer:
12/7=Big/Small
Step-by-step explanation:
A side in the smaller square is 7. A side in the bigger square is 12. That means the bigger side compared to the smaller side will be 12:7. That's the definition of a scale factor.
-4 + 5x -7 = 10 + 3x - 2x
Answer:
X = 21 / 4 (21 over 4)
Step-by-step explanation:
First, we combine like terms:
5x−11=x+10
Step 2: Subtract x from both sides.
5x−11−x=x+10−x
4x−11=10
Step 3: Add 11 to both sides.
4x−11+11=10+11
4x=21
Step 4: Divide both sides by 4.
4x/4 = 21/4
x= 21 / 4
Please give me brainliest of this helped you! Thanks!
Find the volume of the figure.
A
7.18 in3
B
34.44 in3
C
51.66 in3
D
103.32 in3
Answer:
The volume of the figure is 51.66 in3
Step-by-step explanation:
sol;
volume of prism=area of trangular base * length of prism
=1/2*b*p*7.2
=1/2*4.1*3.5*7.2
=51.66 in3
exterior angle theorem
what is the value of z?
Answer:
121 is answer.brrooo
Step-by-step explanation:
hope it helps
Martin needs 60 meters of fence to surround a rectangular garden.
The length of the garden is twice its width, w . How wide is the garden?
Answer:
The garden is 10 ft. wide.
Step-by-step explanation:
2 • (2w + w) = 60 here is an equation to show how I got the width (10 ft.)
2 x 3w = 60
6w = 60
Divide 6 from both sides, 6 & 6 cancel out and 60 divided by 6 is 10.
Lea walked 12miles in 13 hours.How long will it take Lea to walk214 miles?Question 4 options:114113212112
Answer:
231.8?
Step-by-step explanation:
Answer:
231.8Step-by-step explanation:
So 12 miles in 13 house
Then 1 miles is 13/12
so 214 miles is 13/12 × 214 = 231.8
give a reason why x=60 degrees
Answer:
alternate angles will be equal, so x = 60
Step-by-step explanation:
it's an equilateral triangle. all angles are equal to 60°. one of them is alternate to x as per the figure, so x = 60°
help me plzzzzzzz i really need the help or else ....
Answer:
Undefined ....
hope this helps
Which fraction is equivalent to 0.407?
A. 5/24. B. 11/27. C. 13/28. D. 15/31
The equivalent fraction will be;
⇒ 11/27
What is mean by Fraction?
A fraction is a part of whole number, and a way to split up a number into equal parts. Or, A number which is expressed as a quotient is called fraction. It can be written as the form of p : q, which is equivalent to p / q.
Given that;
The number is,
⇒ 0.407
Now,
Since, The number is,
⇒ 0.407
Hence, The equivalent fraction will be;
⇒ 407/1000 = 0.407
And, By option B;
⇒ 11/27 = 0.407
Thus, The equivalent fraction will be;
⇒ 11/27
Learn more about the fraction visit:
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Match the vocabulary to the proper definition.
1. experiment
two disjoint events of which one or the other must occur
2. complementary events
any activity that has two or more outcomes
3. event
a specific outcome or group of outcomes
4. disjoint events
events that have no outcomes in common
Answer:
Step-by-step explanation:
1) Experiment - any activity that has two or more outcomes
2) Complementary events - two disjoint events of which one or the other must occur
3) Event - a specific outcome or group of outcomes
4) Disjoint events - events that have no outcomes in common
What is the description of the pattern in the sequence?
1, 4, 16, 64, 256,...
a. The pattern is to multiply 3.
b. The pattern is to multiply by 4.
c. The pattern is to add 3.
d. The pattern is to add 4.
Answer:
answer is B
Step-by-step explanation:
trust me I took this quiz already
every item is 80% off and the regular price of a t-shirt is 10$ what is its sale price
Answer:
2$
Step-by-step explanation:
10$ - 80%=2$
The sale price is 2$.
2. What are the values of a and b?
(1 point)
Answer:
9 13
a_. b=_
3 3
Step-by-step explanation:
it's that because you can devid 9 by 3
Find the area of the parallelogram.
5 in.
8 in.
1) Blair has a box of candy to sell. She has 4 chocolate bars, 4 fruit chews, 1 pack of
bubble gum and 3 sour candies.
If she chooses a piece of candy at random, how many possible outcome are there?
O 11
0 42
O 13
O 12
Answer:
12
Step-by-step explanation:
If she's only selecting one candy, then you simply need to count how many candies there are.
Answer:
12 are the possible outcomes
Step-by-step explanation:
because probability is a game of chance
possible outcomes/ total outcomes
Is this correct or wrong
