There are three basic methods for solving quadratic equations: factoring, using the quadratic formula, and completing the square.
quadratic equations
Quadratic equations are the polynomial equations of degree 2 in one variable of type f(x) = ax^2 + bx + c = 0 where a, b, c, ∈ R and a ≠ 0. It is the general form of a quadratic equation where 'a' is called the leading coefficient and 'c' is called the absolute term of f (x).
factoring
factorization or factoring consists of writing a number or another mathematical object as a product of several factors, usually smaller or simpler objects of the same kind.
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Use the given information in the triangle at the right to give the correct description of the
triangle.
( describe it in terms of angles and sides)
Answer:
Isosceles triangle.
Step-by-step explanation:
The first side of the given triangle = 6 units
The second side of the given triangle = 6 units
The third side of the given triangle = 9 units
In an isosceles triangle, two sides of a triangle are equal and if sides are equal they have the same angle at the base.
The given triangle is an isosceles triangle.
What do you call the angle measures 90 180 and 270?
An angle that measures 90 degrees is called a right angle, an angle that measures 180 degrees is called a straight angle and an angle that measures 270 degrees is called a reflex angle.
A right angle is an angle that measures exactly 90 degrees. It is formed by the intersection of two lines that are perpendicular to each other. A right angle is symbolized by a small square at the vertex of the angle.
A straight angle is an angle that measures exactly 180 degrees. It is formed by the intersection of two lines that are collinear, that is, they lie on the same line. A straight angle is represented by a straight line, usually with an arrow on one end pointing in the direction of the other end.
A reflex angle is an angle that measures greater than 180 degrees but less than 360 degrees. It is formed by the intersection of two lines that are not collinear, that is, they don't lie on the same line and the angle is greater than a straight angle. A reflex angle is represented by an arc with a curved arrow on one end, pointing in the direction of the other end.
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equivalent expression for 2(x – y)?
Answer:
2(4 - 1)
Step-by-step explanation:
What does B mean in texting to a girl?
B typically stands for "Be" in texting. Depending on the context, it could mean different things. For example, it could mean "Be mine" or "Be mine forever" when expressing affection for a girl. It could also mean "Be safe" when wishing someone well.
1. B is a commonly used acronym in texting.
2. It typically stands for the word "Be".
3. Depending on the context, it could mean different things such as expressing affection for a girl or wishing someone well.
B is an acronym commonly used in texting that typically stands for the word "Be" and can have different meanings depending on the context.
B typically stands for "Be" in texting. Depending on the context, it could mean different things. For example, it could mean "Be mine" or "Be mine forever" when expressing affection for a girl. It could also mean "Be safe" when wishing someone well.
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Two sectors of a circle of radius $12$ overlap as shown, with $P$ and $R$ as the centers of the respective circles. Determine the area of the shaded region.
The area of the shaded region is 26.088 sq units.
A circle is a particular type of ellipse in mathematics or geometry where the eccentricity is zero and the two foci are congruent. A circle is also known as the location of points that are evenly spaced out from the center.
The radius of a circle is measured from the center to the edge. The line that splits a circle into two identical halves is its diameter, which is also twice as wide as its radius.
Area of a 60-degree sector of a circle with radius 12 = 60/360 pi 12^2 Since, there are two of these minus the area of equilateral triangle = sqrt3 /4 12^2 = 60/360 pi 12^2 * 2 - sqrt3 /4 12^2 *2 = 26.088 sq units
Thus, the area of the shaded region is 26.088 sq units.
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A hexagon has angles that measure 155°, 80º, 1150, 160°, 110°, and c. What is c?
No links!! I repeat NO links!!
Answer:
c=100 the angles in a hexagon =720 so subtract all the angles from 720. 720-155-80-115-160-110=100
An animal shelter house ferrets, rabbits and dogs. There are 96 animals at the shelter. Of the animals 1/3 are ferrets. 7/8 of the remaining animals are rabbits. How many are dogs? Show your work.
Answer: 8 dogs
Step-by-step explanation:
There are 96 animals in the shelter.
1/3 are ferrets which means that the number of ferrets is:
= 1/3 * 96
= 32 ferrets
Remaining animals:
= 96 - 32
= 64 animals
7/8 of the remaining are rabbits:
= 7/8 * 64
= 56 rabbits
Number of dogs is what is left so:
= 64 - 56
= 8 dogs
Mrs. Hana paid for 30 tickets that cost $7 and $5 with $200. She was given $14 in charge. How many $7 movie tickets did she buy?
Solve it in Singapore Math-Using Models
Answer:
18 tickets at $7
Step-by-step explanation:
You want a "Singapore Math" model solution to the number of $7 tickets Mrs. Hana bought if she got $14 change from $200, and she received a total of 30 tickets, some of which cost $5 each.
ModelThe attachment shows the model we decided upon. Starting from $200, we subtract $14 in change, then divide the remainder into tickets costing $7 each and tickets costing $5 each. The point where the total number of tickets is 30 is the point that identifies the solution.
Mrs. Hana bought 12 tickets at $5 each, and 18 tickets at $7 each.
__
Additional comment
Most illustrations of Singapore Math models are solving for a single variable. Here, we must choose values for two variables (the numbers of $5 and $7 tickets) so the intended model isn't clear.
The model we have used is adequate for the purpose, but tedious to construct. It requires us to identify the point at which the count of $7 tickets (top bar) and the count of $5 tickets (bottom bar) has a sum of 30.
How does graph y=-3(x+1)2 -1 transforms from the parent function y=x^2?
Given:
The function is:
[tex]y=-3(x+1)^2-1[/tex]
The parent function is:
[tex]y=x^2[/tex]
To find:
The transformation of the given function from the parent function.
Solution:
The transformation of a function is given by:
[tex]g(x)=kf(x+a)+b[/tex] .... (i)
Where, k is stretch factor, a is horizontal shift and b is vertical shift.
If 0<k<1, then the graph compressed vertically by factor k and if k>1, then the graph stretch vertically by factor k.
If k<0, then the graph of f(x) is reflected across the x-axis.
If a>0, then the graph shifts a units left and if a<0, then the graph shifts a units right.
If b>0, then the graph shifts b units up and if b<0, then the graph shifts b units down.
The given function can be written as is:
[tex]g(x)=-3(x+1)^2-1[/tex]
Let the parent function be [tex]f(x)=x^2[/tex], then
[tex]g(x)=-3f(x+1)-1[/tex] ...(ii)
On comparing (i) and (ii), we get
[tex]k=-3,a=1,b=-1[/tex]
Therefore, the graph of parent function is stretched vertically by by factor 3 and reflected across the x-axis because [tex]k=-3[/tex], after that the graph of the function shifts 1 unit left and 1 unit down to get the graph of given function.
Find the value of x.
2x-8
6
Answer:
[tex]x=7[/tex]
Step-by-step explanation:
Angles opposite congruent sides in a triangle are congruent.
[tex]6=2x-8 \\ \\ 2x=14 \\ \\ x=7[/tex]
Find x
1.5
0.9
Ifkdkxnfjcjxnfdkmdxn
Answer:
Step-by-step explanation:
Remark
You are trying to find one of the legs of a right triangle. All you need is the Pythagorean Theorem.
Formula
x^2 + y^2 = c^2
Givens
x = ?
y = 0.9
c = 1.5
Solution
x^2 + 0.9^2 = 1.5^2
x^2 + 0.81 = 2.25 Subtract 0.81 from both sides
x^2 = 2.25 - 0.81
x^2 = 1.44 Take the square root of both sides
sqrt(x^2) = sqrt(1.44)
x = 1.2
Charles and wilma have diffrent internet providers. Charles pays $0. 25 per gigabyte of data. Wilma pays a flat fee of $20 and $0. 05 per gigabyte How many gigabytes of data must each use for charles internet bill to be equal to wilma's interet bill
100 terabytes of data must be used in order for Charles' internet bill to equal Wilma's internet cost.
What is the Intercept of the equations?Assume that there are x gigabytes of data.
The equation for Charles is y = 0.25x since he pays $0.25 for each gigabyte of data.
The calculation for Wilma is y = 0.05x + 20 because she pays a flat rate of $20 and $0.05 per gigabyte.
Charles must pay the same amount for internet service as Wilma, so;
0.25x = 0.05x + 20
0.2x = 20
x = 20/0.2
x = 100
Hence, 100 terabytes of data must be used in order for Charles' internet bill to equal Wilma's internet cost.
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Please help me with these two questions
The expression for area of the rectangles are obtained as x² + 10x + 21 and x² - 9x + 8 respectively. The correct options for both parts are (C) and (B) respectively.
What is an Algebraic expression?An algebraic expression can be obtained by doing mathematical operations on the variable and constant terms.
The variable part of an algebraic expression can never be added or subtracted from the constant part.
The dimension of both the rectangles are given as,
First rectangle : (x + 3) and (x + 7)
Second rectangle : (x - 1) and (x - 8)
Since, the area of a rectangle is product of its dimensions.
It can be obtained as,
Area of first rectangle is given as,
⇒ (x + 3) × (x + 7)
⇒ x² + 10x + 21
Area of second rectangle is given as,
⇒ (x - 1) × (x - 8)
⇒ x² - 9x + 8
Hence, the area of both the rectangles are obtained as x² + 10x + 21 and x² - 9x + 8 respectively.
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HELP! Urgent! What is the answer.
Answer:
ioujyghfdgtrssssfhyjukh
Step-by-step explanation:
Reasoning Which of these is the best estimate for 225% of 50? greater than O but less than 1. 50 greater than 1-50 but less than 2. 50 greater than 2. 50 but less than 3. 50 greater than 3. 50
The best estimate for 225% of 50 is (a) greater than O but less than 1. 50
What is another term for estimate?The maximum likelihood method will be used to calculate the point estimate as follows:
T, note the total number of trials.
List the number of accomplishments, S.
MLE = S / T should be used. Your point estimate is the outcome. Prior to explaining a "formal" method of approximation by rounding each number in the calculation to one significant figure, students must first estimate the result of a computation, use a calculator to determine the precise result, then compare the two results. The most accurate estimate is a definite estimate, as it is created by estimating the individual expenses for the various aspects of the project and then combining them into one estimate. Typically, bottom-up estimates are classified under this heading.
The best estimate for 225% of 50 is
= (225*50)/100
= 11250/100
= 112.5
So that, The best estimate for 225% of 50 is (a) greater than O but less than 1. 50
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What i the lope of the line through (-9,6)(−9,6)left parenthei, minu, 9, comma, 6, right parenthei and (-6,-9)(−6,−9
The slope of the line through (-9,6) and (-6,-9) is -5
Now, According to the question:
Let's know:
What is slope and example?
Whenever the equation of a line is written in the form y = mx + b, it is called the slope-intercept form of the equation. The m is the slope of the line. And b is the b in the point that is the y-intercept (0, b). For example, for the equation y = 3x – 7, the slope is 3, and the y-intercept is (0, −7).
The formula for the slope of a line when two points (coordinate pairs)
[tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex] are given is :
[tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex] , where m denotes the slope of the line.
Applying this formula, we get:
[tex]m = \frac{-9-6}{-6-(-9)}[/tex]
[tex]m = \frac{-15}{-6+9}[/tex]
m = [tex]\frac{-15}{3}[/tex]
m = -5
Hence, The slope of the line through (-9,6) and (-6,-9) is -5.
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The complete question is this:
What is the slope of the line through (-9,6) and (-6,-9) ?
Find the approximate value of each trigonometric function.
31
Given that tano 3.454 where << find the values of sine and cose. If necessary, round to 3
2
decimal places.
In Quadrant III, sino s
and cost
Answer:
Given
tanθ = 3.454θ is in the III quadrantWe know in the III quadrant both sine and cosine are negative.
Use the following identities to get values of sinθ and cos θ
sinθ = - tanθ/√(1 +tan²θ) cosθ = - 1/√(1 +tan²θ)Substitute the value of tanθ and find sine and cosine:
sinθ = - 3.454/√(1 + 3.454²) = - 0.961cosθ = - 1/√(1 + 3.454²) = - 0.278Write the equation of a line that is perpendicular to y=14x - 4 and passes through the point (28, 16)
Write a linear function for the values given in the table below
A function whose equation is of the form y = ax + b, where a and b are constants, a does not equal zero, and x is any real number, and whose graph is a straight line.
Given an equation y = 14x -4 there is an equation that is perpendicular to this given equation.
from the slope-intercept of a linear equation:
The linear function equation is the slope-intercept form. Thus, it is expressed as f(x) = mx + b where m is the slope and b is the y-intercept of the line.
thus the slope of the given equation is 14
The slope of the required equation = 1/14
Since both equations are perpendicular
From the slope intercept of the required line equation of a line:
y = 1/14x + c...(2)
Since, it passes through the point (28, 16)
Thus, 16 = 1/14 *28 + c
c = 16
from equation 2
y = 1/14 x + 14
from the table, two given coordinates of a linear function are (4, 36) and (6, 56)
thus slope of the line = (y₂ - y₁) / (x₂ - x₁)
Slope of the line = 20/2 = 10
Equation of a line:
y = 10x +c
Since, it passes through the point (4, 36)
Thus, 36 = 40 + c
c = -4
Therefore, the required equation from the table is y = 10x - 4
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I really need help!! Find the value of..
Answer:488441
Step-by-step explanation:
Ritu had 6 time a number of tamp and Raj took twice the number from Ritu o that he ha a total of 24. Write the algebraic equation and find the root of the equation
The equation to find the root of the statement given in the question is , 12x = 2x - 24.
Let the number of tamp which Ritu have be x
Then the number of tamp which Raj have be 2x = 24
Now as Ritu has 6 times more than Raj , 6( 2x) = 24 x 6
Therefore, the required equation becomes,
12x = 2x - 24
=> 10x = 24
=> x = 2.4 answer.
An equation is a mathematical statement which is made up of constants , variables and operators. There are two parts of an equation which are equated using the equal sign . The right hand and the left hand side of the equation.
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Ramiro aked 60 random people from hi chool how they ue the library. Ue the information from Ramiro’ repreentative ample to make prediction about the chool-wide reult. The chool ha 540 tudent
Yes it is possible to make the prediction about Ramiro's School but not completely.
It is possible to use the information from Ramiro's sample to make predictions about the school-wide results, but it is important to note that the sample may not be fully representative of the entire population of students at the school. There may be sampling biases or other factors that affect the results.
With that said, based on the information provided, we can calculate the proportion of students in Ramiro's sample who use the library in a certain way, and then use that proportion to estimate the number of students at the school who use the library in that way.
For example, if Ramiro's sample shows that 40 out of the 60 people he surveyed use the library to study, we can estimate that approximately 40/60 = 67% of the school's students use the library to study. We can then use this proportion to estimate that approximately 540 x 67% = 361 students at the school use the library to study.
It's important to note that these predictions are based on sample data and they may not be accurate. To make more accurate predictions, a larger, more representative sample would be needed.
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how can you tell when a quadratic equation has one rational solution?
Answer:
The discriminant equates to 0. (the expression underneath the square root sign will equal 0) This means that the curve will not cross the x-axis in two places.
Answer:
b²-4ac=0
Step-by-step explanation:
where
b²-4ac <0 it has no solution
b²-4ac >0 it has two solution
Which of the following is not a descriptor of a normal distribution of a random variable? A. The graph of the distribution is symmetric B. The graph is centered around zero C. The graph of the distribution is bell-shaped. D. The graph is centered around the mean
A normal distribution of a random variable cannot be described (D) by a graph that is centered on the mean.
What is a normal distribution?A continuous probability distribution for a real-valued random variable in statistics is known as a normal distribution or Gaussian distribution.
Since all three of these variables are equal in a normal distribution, they serve as the center of the graph and can either be zero or not.
An example of a continuous probability distribution is the normal distribution, in which the majority of data points cluster in the middle of the range while the remaining ones taper off symmetrically toward either extreme.
The distribution's mean is another name for the center of the range.
Therefore, a normal distribution of a random variable cannot be described (D) by a graph that is centered on the mean.
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What is 2 ÷ 2/9 =
THanks :D
Answer:
9
Step-by-step explanation:
hope this helps have a good day
Answer:
9
Step-by-step explanation:
turn it into
2/1 * 9/2 = 18/2 = 9
Rosita is waking at a uniform rate of 1 km per 10min. What is the distance she covered in 2 1/2 hours?
11. John puts a fence around his rectangular backyard. The width of his backyard is 10 feet. He
uses 60 feet of fencing material in total. What is the length of his backyard?
Length = 20 ft
If he uses 60 ft of fencing to line his rectangular backyard, then the perimeter is 60 ft.
Perimeter formula is ((Width × 2) + (Length × 2))
10 × 2 = 20
20 × 2 = 40
40 + 20 = 60
I’m doing math homework and is about functions they said f(x)= x-3 and g(x)= √x-2
After I set them up I have this
am I supposed to just add the numbers or is there something else to do?
√ (x-3)-2
Answer: It looks like you are trying to find the value of the function h(x) = √ (x-3) - 2.
To find the value of this function for a given value of x, you need to substitute the value of x into the function definition and simplify the expression.
For example, if you want to find the value of h(x) for x = 5, you would substitute 5 for x in the function definition and simplify the expression to get:
h(5) = √(5-3) - 2
= √2 - 2
= 1.4 - 2
= -0.6
Therefore, the value of h(x) for x = 5 is -0.6.
You can follow this same process to find the value of h(x) for any other value of x. Just be sure to substitute the correct value of x into the function definition and simplify the expression to find the final result.
Step-by-step explanation:
Answer:
g[f(x)]
Step-by-step explanation:
Given functions:
[tex]f(x)=x-3[/tex]
[tex]g(x)=\sqrt{x}-2[/tex]
Composite functions are when the output of one function is used as the input of another.
Therefore, to create √(x-3)-2, substitute the function f(x) in place of the x in function g(x):
[tex]\begin{aligned}\implies g[f(x)]&=\sqrt{f(x)}-2\\&=\sqrt{x-3}-2\end{aligned}[/tex]
I need help solving this
Answer:
the correct answer is 302cm²
Answer:
[tex]232 ~cm^2[/tex]
Step-by-step explanation:
[tex]2(8*10)+2(2*10)+2(8*2)=[/tex]
[tex]2*80+2*20+2*16=[/tex]
[tex]160+40+32=[/tex]
[tex]232[/tex]
-----------------------
hope it helps...
have a great day!!
How does the parabola open? Is the vertex a minimum or maximum value?
f(x) = 5x²-3x
The parabola is open upward direction. The vertex is the minimum value of the parabola.
What is a parabola?
A parabola is a planar curve that is mirror-symmetrical and roughly U-shaped in mathematics. It fits various seemingly disparate mathematical descriptions, all of which can be shown to define the same curves. A point and a line are two ways to describe a parabola.
Given quadratic function is
f(x) = 5x² -3x
The leading term of the given function is 5x².
The sign of the leading term is positive, thus it is open upward direction.
Rewrite the given function in the form f(x) = a(x - h)² + k
f(x) = 5x² -3x
f(x) = 5( x² - 3/5 x)
f(x) = 5( x² - 3/5 x + 9/100 - 9/100)
f(x) = 5( x² - 3/5 x + 9/100) - 5 × 9/100
f(x) = 5( x - 3/10)² - 9/20
f(x) = 5( x - 3/10)² + (-9/20)
The vertex of the parabola is (3/10, -9/20).
Since the parabola opens upward direction, thus the vertex of the parabole is a minimum value.
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Use the commutative property to create equivalent expressions. Which expressions are equivalent to 2.2t + 3.5 + 9.8? Check all that apply.
3.5 + 2.2t + 9.8
3 + 2t + 9
2.2 + 3.5 + 9.8t
9.8 + 3.5 + 2.2t
2.2t + 9.8 + 3.5
2.2t + 35.98
hurry plz
Answer:
A D and E
Step-by-step explanation:
I did it on e2020 and it was right
Answer:
The correct answers are:
A: 3.5 + 2.2t + 9.8
D: 9.8 + 3.5 + 2.2t
E: 2.2t + 9.8 + 3.5
Step-by-step explanation:
Hope this helps!