Answers
b²-4ac is the discriminant (D)!
you use it when you have a second degree function and want to find the x. If:
D<0 -> no x that we can find
D=0 -> 1 answer for x
D>0 -> 2 answers for x
when your D is = or > 0 then you use these formulas to find the x:
x1= (-b-VD)/2a
x2= (-b+VD)/2a
example1:
f(x)=2x²+3x+4=0
D= b²-4ac
= 3²-4×2×4
=9- 32
=-23
-> no answers for x
example2:
f(x)=2x²+5x+2=0
D= 4²-4×2×2
= 25-16
=9
x1= (-b-VD)/2a
= (-5-3)/4
= -8/4
=-2
x2= (-b+VD)/2a
= (-5+3)/4
=-2/4
=-1/2
Related Questions
Tyshawn went shopping for a new pair of pants. Sales tax where he lives is 6%. The price of the pair of pants is $49. Find the total price including tax. Round to the nearest cent.
Answers
The total price of new pair of pants including tax will be $ 51.94.
What is the percentage?Everything is stated as if it was a fraction of a hundred in quantity.
Tyshawn went shopping for a new pair of pants.
Sales tax where he lives is 6%.
The price of the pair of pants is $49.
Then the total price of new pair of pants including tax will be
Total cost = 49 x (1 + 0.06)
Total cost = 49 x 1.06
Total cost = $ 51.94
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What must be a factor of the polynomial function f(x) graphed on the coordinate plane below? on a coordinate plane, a parabola opens up. it goes through (0, 3), has a vertex at (3.5, 3), and goes through (6, 0). x – 3 x – 1 x 1 x 3
Answers
The factor of the polynomial function f(x) graphed on the coordinate plane below is x - 1 , Option B is the right answer.
What is a Polynomial Function ?A function in which there is only positive exponents to the variables are called polynomial function.
The missing image is attached with the answer.
It is given in the question
on a coordinate plane, a parabola opens up. it goes through (0, 3), has a vertex at (3.5, 3), and goes through (6, 0)
The zeroes of the polynomial function are the points at which the curve will cut x axis
For the given graph,
the curve cuts the x-axis at x = 1 and x = 6
the factors will be x - 1 and x - 6
Therefore, a factor of the polynomial function f(x) graphed on the coordinate plane below is x - 1 , Option B is the right answer.
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Answer:
B
Step-by-step explanation:
B
4/9 of students at a school are boys. If there are 2322 students at the school, how many are girls?
Answers
If number of boys is 4/9 then number of girls must be 5/9 (of course this is assuming there are no non-binary people). Then just multiple 5/9 * 2322 and you get 1290 girls
Mi papa es el gerente de una empresa donde se fabrican 20 televisores de cada una de las siguientes medidad 20 26 32 37 y 40 pulgadas para el aniversario de la empresa rifaran entre sus 10 empleados dos televisores de 36 pulgadas y uno de 32 pulgadas
1- que probabilidad hay de que en la rifa obtengan una de 40 pulgadas?
2-Que probabilidad hay de que un empleado obtenga una television en la rifa
3-que cantidad de televisores maquila cada empleado
Answers
De acuerdo a la información, se puede inferir que la probabilidad de cada empleado para ganarse un televisor es de 0.3. Por otra parte, la cantidad de televisores que maquilla cada empleado es 2.
¿Cómo calcular la probabilidad de cada empleado de ganarse un televisor?Para calcular la probabilidad de cada empleado de ganarse un televisor utilizamos la siguiente formula:
P (probabilidad) = (casos favorables)/(casos posibles).De acuerdo a la formula, solo tenemos que remplazar los valores, el número de casos favorables es 3 debido a que hay 3 televisores en total el sorteo, y el número de casos posibles, es 10 debido a que 10 empleados están participando en la rifa, como se muestra a continuación:
P = 3 ÷ 10P = 0.3¿Cómo calcular cuántos televisores maquilla cada empleado?Para calcular cuántos televisores maquilla cada empleado debemos tener en cuenta que la empresa produce 20 televisores y que tiene 10 empleados. Entonces tenemos que dividir el numero de televisores en el número de empleados como se muestra a continuación:
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Find the value of z if the volume of the cylinder is 1696.5m^3 use 3.14 for pi and round your answer to the nearest whole number.
Answers
Answer:
6 m
Step-by-step explanation:
The missing dimension can be found using the volume formula with the known values filled in. This gives an equation that can be solved for z.
The volume of a cylinder is given by the formula ...
V = πr²h
__
Using the given values, we have ...
1696.5 m³ = 3.14(z²)(15 m)
z² = (1696.5 m³)/(47.1 m) ≈ 36.0191 m² . . . . divide by 47.1 m
Taking the square root, we find z to be ...
z ≈ √(36.0191 m²) ≈ 6.00 m
The value of z is about 6 m.
The volume of this triangular prism is 95,030 cubic inches. What is the value of m?
85 in
86 in
m =
Answers
Answer:
About 28 inches
Step-by-step explanation:
See attached image. Remember that Volume of a prism can be found by multiplying the area of the side face, by the depth.
Our side face is the shape of a triangle, and the depth is the unknown, m.
Solve the area of the triangle
Divide the volume by the area of the triangle to find our depth
What is the length of HI? (Giving 40 points please hurry!)
Answers
Answer: Hope this helps you!
3
Step-by-step explanation:
9 (total amount) - 6 (1 part of it) = 3 (the other part of it)
Brainliest?
37-(y-19)=2y this is a problom from rsm
Answers
Answer:
y = 56/3
Step-by-step explanation:
Distribute:
37 - (y - 19) = 2y
37 - y + 19 = 2y
Add the numbers:
37 - y + 19 = 2y
56 - y = 2y
Rearrange the terms:
56 - y = 2y
-y + 56 = 2y
Solution:
y = 56/3
Find the third, fourth, and tenth terms of the sequence describe by the rule below
A(n)=3+(n-1)(-2)
Please help ASAP, I need to get this done by midnight...
Answers
The third term, fourth term and tenth term are -1, -3, -15 respectively.
What is a sequence?A sequence is a pattern of numbers in which successive terms differ by an constant term called the common difference or ratio.
Analysis:
For a sequence defined by the rule A(n) = 3 + (n-1)(-2)
Third term, n = 3
A(3) = 3 + (3-1)(-2) = -1
Fourth term, n = 4
A(4) = 3 + (4-1)(-2) = -3
Tenth term, n = 10
A(10) = 3 + (10-1)(-2) = -15
In conclusion, the third, fourth, tenth terms are -1, -3 and -15 respectively.
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Which of the following best describes the graph shown below?
Answers
Using function concepts, it is found that the statement that correctly describes the function is:
C. This is the graph of a one-to-one function.
When does a graph represents a function?A graph represents a function if it is one-to-one, that is, each value of x is mapped to one value of y.
In this problem, this happens, each value of x is mapped to one value of y, in a non-linear format, hence option C is correct.
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find the radius of a circle with a circumference of 59 yards round your answer to the nearest hundredth of a yard
Answers
Answer:
9.39
Step-by-step explanation:
[tex]\frac{C}{2\pi } =R[/tex]
[tex]\frac{59}{6.28}[/tex]= 9.39
Priya is comparing two functions: (x) = 10 . y? and g(x) = 3 - 2* to find out which
one has greater output values as x gets very large.
She notices that f(1) = 10 and f(2) = 40. However, g(1) = 6 and g(2) = 12. She
concludes that as x continues to grow, the values of f will be greater than the values
of g.
Explain why priyas conclusion is incorrect
Answers
Answer:
help me to find Xian pleaseee:( i miss him so much:(
sorry for answering Non sense po i hope u understand me ty po!
anyone know the answer?
Answers
Answer:
I think it could be A
Step-by-step explanation:
Not 100% sure tho
hich are correct representations of the inequality –3(2x – 5) < 5(2 – x)? Select two options.
x < 5
–6x – 5 < 10 – x
–6x + 15 < 10 – 5x
A number line from negative 3 to 3 in increments of 1. An open circle is at 5 and a bold line starts at 5 and is pointing to the right.
A number line from negative 3 to 3 in increments of 1. An open circle is at negative 5 and a bold line starts at negative 5 and is pointing to the left.
Answers
explenation just because
10, 5, 5/2 Find the 6th term.
Answers
Answer:
Hey there!
Arithmetic sequences are made up of terms that are added or subtracted, and geometric sequences are made up of terms that are multiplied or divided.
Given this info, we can see that we go from 10 to -5. Because we know that this is geometric, we see that we must divide by -2 in our sequence.
We can see that this is true because -5/-2=5/2.
Now, we could simply continue dividing by negative two to get our answer, which is -5/16.
You could easily do that with a calculator, but if you had to find a term that was farther from the first term, that would take forever to do with a calculator, so there is an equation that you can use and plug in your numbers to find the answer quickly.
, where is the number of term in the sequence (6 in this problem), a is the first term of the sequence (10), and r is the common ratio (-1/2).
I hope this helps!
Step-by-step explanation:
need answer asap!!!!!
how would i solve this?
Answers
The height of the building to the nearest tenth of a meter is; 13 m
How to make use of Cosine Rule?The slant line from the top of Trevor's head to the base of the building is gotten from Pythagoras theorem;
15/x = sin 36°
x = 15/sin 36
x = 25.52 m
Angle between that slant line and base of building is;
90 - tan⁻¹(1.5/14) = θ
θ = 83.88°
Remaining angle of the bigger triangle is;
180 - (36 + 83.88) = 60.12°
Thus, if the height of the building is h, then;
h/sin 36 = 25.52/sin 60.12
h = 13 m
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Find The volume of the triangular prism is
Answers
Answer:, Volume of triangular prism = (1/2) bh × L.
While cooking a stew, Jim used 2/3 of a shaker of salt and 7/12 of a shaker of pepper. How
much more salt did Jim use?
Answers
Answer:
he used one 1/12 more of salt.
Step-by-step explanation:
2/3 I know equals 8/12
And
7/12 = 7/12 so
You just do
8/12 - 7/12 = 1/12
Will be marked barinliest if correct
Answers
Answer:
12
Step-by-step explanation:
Using the very helpful diagram, you can simply count the number of items on the far right. So 6 combinations with cola and 6 combinations with juice together equal 12 total combinations.
Answer:
How to answer this?
Step-by-step explanation:
p and q are rational numbers which of the following expression cannot be used to find the distance between them on the number line
Answers
The expression that cannot be used to find the distance between them on the number line is |p + q|.
How to depict the infomation?p and q are rational numbers. Which of the following expressions cannot be used to find the distance between them on the number line.
A. |p - q|
B. |p + q|
C. |q + (-p)|
D. |q - p|
Rational number is a number that can be represented as the quotient p/q of two integers such that q ≠ 0.
Here, the expression that cannot be used to find the distance between them on the number line is |p + q|.
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Identify the clusters in the data.
Answers
The clusters in the data is the cluster with the most circles together in the middle and this can be found at two point which are red dot (clusters) between 3.5-5 and 10 - 11.5 in the y axis.
What are clusters in a data set?A data cluster is known to be a kind of subpopulation of a bigger dataset where each data point are known to very close to the cluster center than to other cluster centers as seen in a the dataset.
Therefore, one can say that The clusters in the data is the cluster with the most circles together in the middle and this can be found at two point which are red dot (clusters) between 3.5-5 and 10 - 11.5 in the y axis.
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Solve the percent proportion. 7 is 35% of what number?
Answers
Answer:
35 ×x =7
100
35x=7
100
35x=700
35 35
x = 20.
HOPE IT HELPS,BRAINLIESTPLEASEThe diagonals of kite KITE intersect at point P. Which statement is true?
A. < KIE =
B.
C.
D.
Answers
Based on the properties of a kite, the statement that is true is: D. KPE = TPE.
What is a Kite?A kite is a quadrilateral in which its diagonals intersect at right angles.
Also, the non-vertex angles of a kite are congruent, that is they have equal measure.
Angle KPE and angle TPE in the given kite are right angles formed at the point of intersection of the two diagonals of the kite. They both equal 90 degrees.
Therefore, the true statement is:
D. KPE = TPE
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Let f(x)=(18)3^x. find the equation of the line between the points (-2,f(-2)) and (1,f(1))
Answers
[tex]\text{Given that,} \\\\f(x) = 18 \cdot 3^x \\\\f(-2) = 18 \cdot 3^{-2} = 2\\\\f(1) = 18 \cdot 3^1 = 54\\ \\\text{So,}~ (x_1,y_1) = (x_1, f(-2)) = (-2,2) ~\text{and}~ (x_2,y_2) = (x_2, f(1)) = (1,54)\\ \\\text{Slope,}~ m = \dfrac{y_2 -y_1}{x_2 -x_1} = \dfrac{54-2}{1+2} = \dfrac{52}3 \\\\[/tex]
[tex]\text{Equation of line,}\\\\~~~~~~~y - y_1 = m (x-x_1)\\\\\\\implies y-2 = \dfrac{52}3(x+2)~~~~~~~~~~~;[\text{Point-Slope form.]} \\\\\\\implies y-2 = \dfrac{52}3x + \dfrac{104}3\\\\\\\implies y = \dfrac{52}{3}x + \dfrac{104} 3 +2\\\\\\\implies y = \dfrac{52}3 x +\dfrac{110}3 ~~~~~~~~~~~~~~~;[\text{Slope -Intercept form}][/tex]
What is the lowest common denominator of the following set of fractions:1/6, 13/27, 4/5, 3/10, 2/5?
Answers
The lowest common denominator of the set of fractions 1/6, 13/27, 4/5, 3/10, 2/5 is 270.
What is lowest common denominator?The lowest common denominator of LCD is least common multiple of denominators of the fractions.
given fractions:
1/6, 13/27, 4/5, 3/10, 2/5
taking the Prime factorization of denominator of the fractions
6 = 2x3x1
27 = 3x3x3x1
5 = 5x1
10 = 2x5x1
5 = 5x1
Therefore, lcm is 2x3x3x3x5 = 270
so, LCD is 270
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this is literally the easiest question, but for some reason I keep getting it wrong...
Answers
Answer:
Hi the correct answer will be C, E, and F.
Step-by-step explanation:
Why C? 23 is greater than 16
Why E? 23 is greater than or equal to 16. Remember here says "or"
Why F? 23 is not equal to 16.
What is the volume of the figure?
A. 188.5 units cubed
B. 196.9 units cubed
C. 205.3 units cubed
D. 213.6 units cubed
Answers
1. The area of a rectangular carpet is X² + X - 2. HINT: Area = length X breadth
a). if X is a whole number, use factorization to find the length and the breadth of the carpet in terms of X.
b). if X = 2 m, find the actual dimensions of the carpet.
c). it costs R50 per square metre to make such this carpet. how much will it cost to manufacture 5 carpets?
Answers
Cara is a high school student. On average, there are 26 students per class at her school, with a standard deviation of 3 students. What percentage of classes at Cara's high school will have between 20 students and 35 students?
A. 0.15%
B. 97%
C. 99%
D. 0.3%
Answers
Answer:
B. 97%
Step-by-step explanation:
20 students is -2 standard deviations away from the mean
35 is +3 standard deviations away from the mean
100 - 2.4 = 97.6
(2.4 is amount of data we are not using)
please refer to the standard deviation graph attached :)
Graph the System of Inequalities:
y> 4x-3
y≤-½x + 5
Answers
Answer: I attached the graph.
Step-by-step explanation: