Both students made a mistake.
Describe the mistake each student made.
Explain what each student needs to do to fix their mistake.
Create your own quadratic equation, and explain how to use the quadratic formula to solve it. Be specific, using a, b, and c of your equation and giving the solutions to the equation you chose.
Answers
Answer:
true answer I'm search in Goole
The root of the quadratic equation x = -3/4[tex]\pm[/tex] √-31/ 4.
What is a solution for a quadratic equation?Suppose that we've a function y = f(x) such that f(x) is quadratic.
When y = 0, then the values of x for which f(x) = 0 is called solution of quadratic equation f(x) = 0
These solution gives values of x, and when we plot x and f(x), we'd see that the graph intersects the x-axis at its solution points.
Then its roots are given as
[tex]x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}[/tex]
Given; 2x^2 + 3x + 5 = 0
We know that a=2, b=3, c=5
[tex]x = \dfrac{-b \pm \sqrt{b^2 - 4ac}}{2a}[/tex]
[tex]x = \dfrac{-3\pm \sqrt{3^2 - 4(2) ( 5)}}{2(2)}\\\\\\x = \dfrac{-3\pm \sqrt{9 - 40}}{4}\\\\\\x = \dfrac{-3\pm \sqrt{-31}}{4}\\\\\\x = \dfrac{-3}{4}\pm \dfrac {\sqrt{-31}}{4}[/tex]
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Related Questions
Marking brainliest!!
Answers
Answer:
C. 1,020
Step-by-step explanation:
have a good day!! :)
write each equation in slope intercept form 9x + 35 = -5y. 2y - 6 = -6x. -11 - 7y = -56
Answers
Answer:
y= -9/5x -7
y= -3x +2
y= 45/7
which number is in the solution set of the equality x < -8?
A: -2 B: -4 C: -6 D: -10
Answers
Answer:
The answer is b
Step-by-step explanation:
Brainliest pls
Find the value of each trigonometric ratio.
Answers
Answer:
SinZ=perpendicular/hypotenuse=15/17 is your answer
Which is the equation of the line through the point (−3, 8) that is perpendicular to the line y=14x+12?
Answers
Answer:
y = -1/14x + 109/14
Step-by-step explanation:
If two lines are perpendicular to each other, they have opposite slopes.
The first line is y = 14x + 12. Its slope is 14. A line perpendicular to this one will have a slope of -1/14.
Plug this value (-1/14) into your standard point-slope equation of y = mx + b.
y = -1/14x + b
To find b, we want to plug in a value that we know is on this line: in this case, it is (-3, 8). Plug in the x and y values into the x and y of the standard equation.
8 = -1/14(-3) + b
To find b, multiply the slope and the input of x (-3)
8 = 3/14 + b
Now, subtract 3/14 from both sides to isolate b.
8 - 3/14 = b
112/14 - 3/14 = b
109/14 = b
Plug this into your standard equation.
y = -1/14x + 109/14
This equation is parallel/perpendicular to your given equation (y = 14x + 12) and contains point (-3, 8)
Hope this helps!
Of the balloons recently sold by party store, 4 were purple and 8 were other colors. Considering the data, how many of the next 66 balloons sold would you expect to be purple
Answers
Answer: 22
Step-by-step explanation:
From the question, we are given the information that of the balloons recently sold by party store, 4 were purple and 8 were other colors. This means that the fraction of those that was purple is:
= 4/(4+8)
= 4/12
= 1/3.
Therefore, if there are 66 balloons, the number expected to be purple will be:
= 1/3 × 66
= 22
There'll be 22 purple balloons
Answer:
22
Step-by-step explanation:
= 4/(4+8)
= 4/12
= 1/3.
= 1/3 × 66
= 22
There'll be 22 purple balloons.
Consider the following pair of equations: y = x + 4 y = −5x − 2 Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.
Answers
Answer:
(-1, 3)
Step-by-step explanation:
to solve using substitution, you have to know the value of either x or y. in this example, they gave you the value of y already: y=x+4.
this means you can substitute the y for (x+4). if we substitute y for (x+4) in the equation y=-5x-2, we get this:
(x+4)=-5x-2
then solve for x
6x=-6
so x=-1
since we know the x value, we can solve for y
y=x+4
y=-1+4
y=3
so the final answer is (-1, 3)
Answer:
(- 1, 3 )
Step-by-step explanation:
Given the 2 equations
y = x + 4 → (1)
y = - 5x - 2 → (2)
Substitute y = x + 4 into (2)
x + 4 = - 5x - 2 ( add 5x to both sides )
6x + 4 = - 2 ( subtract 4 from both sides )
6x = - 6 ( divide both sides by 6 )
x = - 1
Substitute x = - 1 into either of the 2 equations and evaluate for y
Substituting into (1)
y = - 1 + 4 = 3
solution is (- 1, 3 )
What is 5 7/20 written as a decimal?
Answers
Answer:
5.35
Step-by-step explanation:
Answer:
5 7/20 as a decimal is 5.35
Please find the area and perimeter
Answers
Answer:
Area: 54 in² Perimeter: 36 inStep-by-step explanation:
Area:
A = 6 in · 10 in - 2 in · 3 in = 60 in² - 6 in² = 54 in²
Perimeter:
P = 2·6 in + 10 in + 6 in + 3 in + 1 in + 2·2 in = 12 in + 20 in + 4 in = 36 in
Which of the following values are in the domain of the function graphed
below? Check all that apply.
А. 0
B. -1
C. 2
D. 1
E-2
F. 3
Answers
Answer: functions graphically because they were, after all, just sets of points in the plane. Then in ... However, of these two answers, only x = −2 fits in the domain x < 1 for this piece. This means the only x-intercept for the x < 1 region of the x-axis is (−2,0). ... use the formula f(x) = x − 3, so the point on the graph (1,f(1)) is (1,−2).
Mrs. Jasmine bought 6 kilograms of rice.After filling 10 containers with the same amount of rice in each, she had 860 grams remaining. How much rice, in grams, is in each of the 10 containers?
Answers
Answer:514 grams of rice is in each of the 10 containers
Step-by-step explanation:
Amount of rice bought =6 kilograms of rice.
6 kilograms =6000grams
Amount of rice reaming after filling 10 containers =860g
Amount used to fill up the containers ==6000grams-860grams =5140 grams
To get the amount filled inside the 10 containers since same amount is in each, we divide by 10
5140 grams/10=514 grams
Anybody wanna do a Ka.hoot or Quiziz game?
Answers
Answer:
me
Step-by-step explanation:
In the real number system where would -35 belong? *
Integer
Rational Number
Whole number
Answers
Answer:
Integer
Step-by-step explanation:
Integers includes negative numbers
In the real number system, -35 would belong to the set of integers.
What is an Equation?Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.
It demonstrates the equality of the relationship between the expressions printed on the left and right sides.
Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.
Given data ,
Let the equation be represented as A
Now , the value of A is
Substituting the values in the equation , we get
A = -35
In the real number system, -35 would belong to the set of integers.
Integers are the set of whole numbers, their opposites, and zero.
Since -35 is a negative whole number, it is an integer but not a whole number or a rational number.
Hence , the number is an integer
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I need to study and this question I have been working on for a hour could someone help me with the question Please show me how to do it and don't post links for the answer
Answers
answer :
18.84 is the answer
pls help!! will give brainliest!
Answers
Answer:
It has more than 2 equal sides
Step-by-step explanation:
a) -9f -f=
b) h³ + 8h³ =
c) -3ef² + 4ef² -ef²
d) -2xy + 5xy - 4xy
e) -2ab -7ab + 6ab
ayuda
Answers
Step-by-step explanation:
a) -9f -f= -10f
b) h³ + 8h³ = 9h³
c) -3ef² + 4ef² -ef²= 0
d) -2xy + 5xy - 4xy = -xy
e) -2ab -7ab + 6ab = -3ab
Expand
8(10-c)
........................................................
Answers
Answer:
80 - 8c
Step-by-step explanation:
8(10-c)
80 - 8c
Explanation:
Distribute the outter number into the parenthesis. After distributing you’ll want to multiply the outter number with the numbers that were in the parenthesis individually.
8 • 10
8 • -c
Now find the sum for each then combine like-terms.
8 • 10 = 80
8 • -c = -8c
Remember that a negative times a positive will remain a negative!! Since there are no like-terms we end up with the following equation, 80 - 8c
What is the equation of the line that passes through the point (-5, 4) and has a slope of - 3/5
Answers
Step-by-step explanation:
Using point slope form ,
=> ( x - (-5) ) m = ( y - 4)
=> x + 5 = -3/5 ( y - 4)
=> 5x + 25 = -3y + 12
=> 5x + 3y + 13 = 0
Your cookie recipe calls for 3/4 cup of flour. You want to make 3 batches of cookies. Which diagram shows how much flour you need?
Answers
Answer: The correct answer is the second one
Step-by-step explanation:
2x-3=4(x+2) step by step plz
Answers
Answer:
The answer is -5.5
Step-by-step explanation:
2x-3=4(x+2)
2x-3=4x+8
-2x=11
X=-5.5
Find the product of the sum and difference. (Please try to answer all of them If not it's OK!)
Answers
Answer:
[tex]16 {x}^{2} - 9[/tex]
Step-by-step explanation:
Use the F.O.I.L. method
Answer:
1) [tex]81c^{2}[/tex]-1
2) [tex]16x^{2}[/tex]-9
3) [tex]-4y^{2}[/tex]+25
4) [tex]-w^{2}[/tex]+16
Step-by-step explanation:
Which function is not linear?
A.
y−7=2(x+4)
B.
y=83x
C.
y=(x−3)2
D.
5x−6y=17
Answers
Step-by-step explanation:
There are no exponents or division? as is, all of these are linear because there are no exponents, division by a variable, or square roots. did you miss something writing this? these are all changing at a constant rate.
shirely walked 3,520 yards on tuesday. how many total miles would that be?
Answers
Answer:
2 miles
Step-by-step explanation:
NEED HELP! The wind-speed, in miles per hour (mph), was measured every six hours during a day on the Isles od Scilly.
Answers
Answer:
That’s not a lot of info...
Step-by-step explanation:
A square wrestling mat has a perimeter of 12x + 32 feet. Write an expression that represents the side length of the mat in feet.
Answers
Answer: [tex]3x+8\ ft[/tex]
Step-by-step explanation:
Given
Square wrestling has a perimeter of 12x+32 feet
Suppose the side of the square mat is a
Perimeter is the sum of the side lengths of a polygon
for square, it is given by
[tex]\Rightarrow 4a=12x+32\\\\\Rightarrow a=\dfrac{12x+32}{4}\\\\\Rightarrow a=3x+8\ ft[/tex]
Therefore, the side length of the square mat is [tex]3x+8\ ft[/tex]
HELP ASAP!!! HELP FAST PLEASE!!
Answers
Answer:
9
Step-by-step explanation:
Ryan and Danielle competed in a bike race.Ryan biked 11,988 meters and Danielle 13,336 meters.How much more did Danielle bike then Ryan?
Answers
Answer:
1348 more meters.
Step-by-step explanation:
Subtract
13336 - 11988 = 1348
Danielle biked 1348 more meters than Ryan
If my answer is incorrect, pls correct me!
If you like my answer and explanation, mark me as brainliest!
-Chetan K
Danielle biked 1348 meters more than Ryan. I hope this helped you out to solve your problem.
Evaluate the expression below when n = 2.4. If needed, answer as a fraction or a decimal.
12n−8
Answers
Answer:
20.8
Step-by-step explanation:
Plug in 2.4 as n in the expression, and simplify:
12n - 8
12(2.4) - 8
28.8 - 8
= 20.8
So, the answer is 20.8
A square box is being cut apart and has the measurements shown below. What is the surface are each square is 3.5 inches and there 6 squares
Answers
Answer:
73.5 in^2
Step-by-step explanation:
Given data
Dimension of square= 3.5 inches
Area= 3.5^2
Area= 12.25 in^2
Number of square= 6
Hence the total area is
=12.25*6
=73.5 in^2
A school is building a rectangular stage for its chorus. The stage must have a width of 7 feet. The area of the stage must be at least 84 square feet. (The stage must hold all the singers.) Write an inequality that describes the possible lengths (in feet) of the stage.
Answers
Step-by-step explanation:
if L is for length, so
L ≥ 84/7
L ≥ 12 feet