If D > 0 and not an excellent square, then the roots of the quadratic equation are real, unequal and irrational.
What is Quadratic Equation ?
Quadratic equation can be defined as equation in which it is in the form of ax^2+bx+c = 0 .
Nature of Roots depending upon Discriminant
in step with the value of discriminant, we shall discuss the subsequent cases about the character of roots.
Case 1: D = 0
If the discriminant is same to 0 (b2 – 4ac = zero), a, b, c are real numbers, a≠0, then the roots of the quadratic equation ax2 + bx + c = zero, are real and equal. In this case, the roots are x = -b/2a. The graph of the equation touches the X axis at a single point.
Case 2: D > 0
If the discriminant is greater than zero (b2 – 4ac > 0), a, b, c are actual numbers, a≠0, then the roots of the quadratic equation ax2 + bx + c = 0, are actual and unequal. The graph of the equation touches the X-axis at two unique points.
Case 3: D < 0
If the discriminant is less than 0 (b2 – 4ac < 0), a, b, c are real numbers, a≠0, then the roots of the quadratic equation ax2 + bx + c = 0, are imaginary and unequal. The roots exist in conjugate pairs. The graph of the equation does not touch the X-axis.
Case 4: D > zero and perfect square
If D > zero and an excellent square, then the roots of the quadratic equation are actual, unequal and rational.
Case five: D > 0 and now not an excellent square
If D > 0 and not an excellent square, then the roots of the quadratic equation are real, unequal and irrational.
Therefore, If D > 0 and not an excellent square, then the roots of the quadratic equation are real, unequal and irrational.
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Find the selling price.
Cost to store: $65
Markup: 80%
The selling price for the article if it is equal to marked price will be $117
using profit and loss formulas.
What is profit and loss formula?
Profit and Loss formula is used in mathematics to determine the price of a commodity in the market and understand how profitable a business is. Every product has a cost price and a selling price. Based on the values of these prices, we can calculate the profit gained or the loss incurred for a particular product. The important terms covered under this are cost price, fixed, variable and semi-variable cost, selling price, marked price, list price, margin, etc.
For example, for a shopkeeper, if the value of the selling price is more than the cost price of a commodity, then it is a profit and if the cost price is more than the selling price, it becomes a loss.
Now,
Given Cost price=$65
Marked up price = 180%*$65
As
Marked up price = selling price
Therefore
selling price= 180%*$65
selling price =$117
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30 POINTS!
A eyeglasses store is checking their inventory. The table shows the relationship between the number of days since the opening of the eyeglasses store and the total amount of sunglasses in their inventory.
Sunglasses Inventory
Number of Days Total Amount of Sunglasses
2 52
5 46
7 42
10 36
Which graph shows the relationship given in the table?
graph with the x axis labeled number of days and the y axis labeled total amount of sunglasses and a line going from the point 0 comma 52 through the point 1 comma 50
graph with the x axis labeled number of days and the y axis labeled total amount of sunglasses and a line going from the point 0 comma 56 through the point 1 comma 54
graph with the x axis labeled number of days and the y axis labeled total amount of sunglasses and a line going from the point 0 comma 52 through the point 1 comma 49
graph with the x axis labeled number of days and the y axis labeled total amount of sunglasses and a line going from the point 0 comma 56 through the point 1 comma 53
The images are also the answers
A graph which shows the relationship given in the table is: B. graph with the x axis labeled number of days and the y axis labeled total amount of sunglasses and a line going from the point 0 comma 56 through the point 1 comma 54.
How to construct and plot the data on a graph?In this scenario, the number of days would be plotted on the x-axis (x-coordinate) of the scatter plot while the total amount of sunglasses would be plotted on the y-axis (y-coordinate) of the scatter plot through the use of Microsoft Excel.
From the scatter plot (see attachment) which models the relationship between the number of days and total amount of sunglasses, a linear equation for the line of best fit is given by:
y = -2x + 56
In conclusion, we can reasonably infer and logically deduce that the y-intercept is equal to (0, 56).
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Answer:
YOUR WELCOME THE ANSWER IS
Step-by-step explanation:
B (-:{
why does the man with the tattooing pen urge hannah not to forget the number on her arm in devil's arithmetic
The character Hannah is sent back in time to the Holocaust in Jane Yolen's book "The Devil's Arithmetic," where the Nazis tattoo a number on her arm.
The guy who tattooed Hannah's arm begs her not to forget the number because it serves as a powerful reminder of the significance of remembering and never forgetting the past and acts as a permanent reminder of the crimes done during the Holocaust. Hannah must remember the number since it is also a way of tracking and identifying people within the concentration camp.
Hannah is questioned about her name by the prisoner who is in charge of tattooing the ladies. That person is Chaya Abramowicz, she responds. She is wearing his daughter's outfit, he informs her. She had the same name, Chaya. He advises her to live for all the Chayas in the world and to never forget her prisoner number.
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(A)Find the length of the arc.
(B)Find the area of the sector.
r = 8 cm, Theta = 45°
a. The length of the arc is 6.28cm
b. The area of the sector is 25.12cm²
What are arc and sector?The arc of a circle is defined as the part or segment of the circumference of a circle. A sector is the space bounded by the arc and the radii of the circle. The smaller area is known as the minor sector and the bigger area is known as the major sector.
The length of an arc = tetha /360 ×2πr
= 45/360 × 2×3.14× 8
= 2×3.142 = 6.28cm
The area of a sector = tetha / 360 × πr²
= 45/360 × 3.14 × 8× 8
= 3.14× 8
= 25.12 cm²
Therefore, the length of the arc is 6.28cm and the area of the sector is 25.12cm²
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find the distance from the given point to each of the following. (3, 9, -7) (a) the xy-plane 7 correct: your answer is correct. (b) the yz-plane 3 correct: your answer is correct. (c) the xz-plane 9 correct: your answer is correct. (d) the x-axis correct: your answer is correct. (e) the y-axis correct: your answer is correct. (f) the z-axis correct: your answer is correct.
Distance from point (3,9,-7) to xy-plane is 7, yz-plane is 3, xz-plane is 9, x-axis, y-axis and z-axis is 0.
What is axis ?
An axis is a line about which a body rotates or a system oscillates. In mathematics and physics, an axis is often represented as a straight line that serves as a reference point for the measurement of coordinates.
The correct answers are :
(a) The distance from the point (3, 9, -7) to the xy-plane is the distance from the point to the z-axis, which is 7, since the xy-plane is at z = 0
(b) The distance from the point (3, 9, -7) to the yz-plane is the distance from the point to the x-axis, which is 3, since the yz-plane is at x = 0
(c) The distance from the point (3, 9, -7) to the xz-plane is the distance from the point to the y-axis, which is 9, since the xz-plane is at y = 0
(d) The distance from the point (3, 9, -7) to the x-axis is the distance from the point to the x-axis, which is 0, since the point is already on the x-axis
(e) The distance from the point (3, 9, -7) to the y-axis is the distance from the point to the y-axis, which is 0, since the point is already on the y-axis
(f) The distance from the point (3, 9, -7) to the z-axis is the distance from the point to the z-axis, which is 0, since the point is already on the z-axis
Distance from point (3,9,-7) to xy-plane is 7, yz-plane is 3, xz-plane is 9, x-axis, y-axis and z-axis is 0.
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Given p(x) = x^3+4x^2-3x+2 and p(x)/x-1= x^2+5x+2 R4 Which statement is true? Select all that apply. A.p(1)= 4 B.p(x)= (x - 1)(x^2 + 5x + 2) +4/x-1 C.p(x)= (x-1)-(x^2+5x+2)+4 D.p(-1)= 4
The correct statement relative to the polynomial function is given as follows:
A. p(1)= 4
B. p(x)= (x^2 + 5x + 2) +4/x-1
How to obtain the correct statement?The polynomial function for this problem is given as follows:
p(x) = x^3+4x^2-3x+2
Dividing the polynomial function by x - 1, the quotient and the remainder are given as follows:
Quotient: x² + 5x + 2Remainder: 4.Meaning that:
The function can be written as: p(x)= (x^2 + 5x + 2) +4/x-1.By the Remainder Theorem, p(1) = 4.Hence the correct options are given by option A and option B.
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I Need help with this I’ve tried stuff and stuff but it’s not working
Answer:
y= -2x + 0
Step-by-step explanation:
to get to y you need to multiply by -2 and add 0 to that to get the final y answer
A mathematics teacher wanted to see the correlation between test scores and homework. The homework grade (x) and test grade (y) are given in the accompanying table. Write the linear regression equation that represents this set of data, rounding all coefficients to the nearest tenth. Using this equation, find the projected test grade, to the nearest integer, for a student with a homework grade of 37.
Regression equation:
Final Answer:
You can substitute a homework grade of 37 into the equation in place of x, to find the projected test grade.
What is linear regression?Linear regression is a statistical method that is used to study the relationship between two continuous variables, often referred to as the independent variable (x) and the dependent variable (y). The goal of linear regression is to find the best-fitting line that describes the relationship between these two variables. The best-fitting line is known as the regression line, and it is represented by the equation y = mx + b, where m is the slope of the line, and b is the y-intercept.
To find the linear regression equation, we need to use the least squares method to find the line of best fit that describes the relationship between the homework grade (x) and the test grade (y). The equation of the line is in the form of y = mx + b, where m is the slope and b is the y-intercept.
To find the slope (m) and y-intercept (b) we can use the following formulas:
m = (n(Σxy) - (Σx)(Σy)) / (n(Σx²) - (Σx)²)
b = (Σy - m(Σx)) / n
where n is the number of data points, Σx and Σy are the sum of x and y values, Σxy is the sum of the product of x and y values, and Σx² is the sum of the squares of x values.
Given the data points, we can use this information to calculate the slope and y-intercept, and write the linear regression equation.
Given the linear regression equation of the form y = mx + b
You can substitute a homework grade of 37 into the equation in place of x, to find the projected test grade.
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The prism below is made of cubes which measure 1/4 of a foot on one side. What is the volume? A. 13/4 cubic feet B. 80 cubic feet C. 20 cubic feet D.5/4 cubic feet
The volume of the prism in this problem is given as follows:
C. 9/16 cubic feet.
How to obtain the volume of the rectangular prism?The volume of a rectangular prism, with dimensions length, width and height, is given by the multiplication of these dimensions, as follows:
Volume = length x width x height.
For this problem, two of the dimensions are formed by three cubes, hence their measures are:
3 x 1/4 = 3/4 foot.
The remaining dimensions is composed by four cubes, hence the measures are:
4 x 1/4 = 1 foot.
Hence the volume is given as follows:
V = 1 x 3/4 x 3/4
V = 9/16 cubic feet.
Missing InformationThe problem is given by the image presented at the end of the answer.
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i need a help with graphing
A graph of the line that passes through the two points (-3/2, -3/2) and (3/2, 3/2) is shown in the image attached below.
How to calculate the slope of any straight line?In Mathematics and Geometry, the slope of any straight line can be calculated by using this mathematical equation (expression);
Slope (m) = (Change in y-axis, Δy)/(Change in x-axis, Δx)
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
From the information provided above, we have the following data points located on the line:
Points on the x-coordinate = (-3/2, 3/2).
Points on the y-coordinate = (-3/2, 3/2).
Substituting the given data points into the slope formula, we have the following;
Slope (m) = (y₂ - y₁)/(x₂ - x₁)
Slope (m) = (3/2 + 3/2)/(3/2 + 3/2)
Slope (m) = 3/3 = 1
At point (-3/2, -3/2), an equation of this line can be calculated by using the point-slope form as follows:
y - y₁ = m(x - x₁)
Where:
m represents the slope.x and y are the data points.c represents the intercept.y - (-3/2) = 1(x - (-3/2))
y + 1.5 = x + 1.5
y = x
Next, we would use an online graphing calculator to plot the linear equation as shown in the graph attached below.
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e
5 Louay wants a cap with less than white
stars. Which cap could Louay buy?
Cap 1
Cap 1 only
Cap 2 only
C
Cap 2 or 3
D Cap 1 or 3
A
B
Cap 2
Cap 3
The correct option regarding which cap Louay can buy is given as follows:
D. Cap 1 or 3.
How to obtain the fraction of white stars?The fraction of white stars is obtained using a proportion, dividing the number of white stars by the total number of stars.
Hence the fractions for each cap are given as follows:
Cap 1: 1/3 = 0.33 < 1/2 = 0.5.Cap 2: 2/4 = 0.5 = 0.5.Cap 3: 2/5 = 0.4 < 1/2 = 0.5.Meaning that Cap 1 and Cap 3 have the desired ratio of white stars relative to total stars, and thus the correct option is given by option D.
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Multi step trig problem
The value of x is 14.28 units, this is determined using the trigonometric functions.
What are trigonometric functions?Simply put, trigonometric functions—also referred to as circular functions—are the functions of a triangle's angle. This means that these trig functions provide the connection between the sides and angles of a triangle. Sine, cosine, tangent, cotangent, secant, and cosecant are the fundamental trigonometric functions.
Consider the smaller triangle:
Sin (30) = Opposite side ÷ Hypotenuse
0.5 = Opposite side ÷ 10
Opposite side = 5
Consider the bigger triangle:
Sin (22) = Opposite side ÷ Hypotenuse
0.37 = 5 ÷ x
x = 5 / 0.35
x = 14.28
Hence, the value of x is 14.28 units, this is determined using the trigonometric identities.
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(9a^4-31a^3-21a^2+6a-13)/(a-4) Synthetic Division
The quotient from the synthetic division (9a^4-31a^3-21a^2+6a-13)/(a-4) is 9a⁴ - 22a³ - a² + 5a - 8/a -4
What is synthetic division?Synthetic division can be defined as a mathematical method of dividing a polynomial by a binomial x - c
Such that, c is a constant.
The steps to take in synthetic division;
Arrange the set up for synthetic divisionWrite down the leading coefficient in the bottom rowMultiply the value of c by the value written on the bottom rowAdd the column that was created in step 3Repeat until the process till the last coefficientGiven the polynomial;
(9a^4-31a^3-21a^2+6a-13)/(a-4)
[tex]\sqrt[a -4]{9a^4 -31a^3 +6a -13}[/tex]
c of divisor x-c
4 coefficients of dividend
9 -31 -21 6 -13
_____9__-22__-1___ 5_______
9 -22 -1 5 -8
The quotient is the;
9a⁴ - 22a³ - a² + 5a - 8/a-4
Hence, the expression is 9a⁴ - 22a³ - a² + 5a - 8/a-4
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Please help GIVING 50 POINTS
Answer:
¿Qué quieres comer?
Step-by-step explanation:
Find the surface area of this rectangular prism. Be sure to include the correct unit in your answer.
The surface area of the rectangular prism is 182m²
How to determine the surface areaIt is important to note that the surface area of a rectangular prism is expressed as;
Surface area = 2(wl + hw + hl)
Where;
w is the width of the rectangular prismh is the height of the rectangular prisml is the length of the rectangular prismNow, from the diagram show, we have the values as;
Length = 3
Height = 7
Width = 7
Substitute the values into the formula
Surface area = 2(7×3 + 7×3 + 7 ×7)
multiply the values
Surface area = 2(21 + 21 + 49)
expand the bracket
Surface = 182m²
Thus, the value is 182m²
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An item on sale costs 30% of the original price. If the original price was $90 what is the sale price
Terra argues that is not a function because two different inputs produce the same output, as shown in the table.
Is Terra correct in claiming that is not a function?
Input Output
-1 2
0 0
1 2
Terra is
correct/incorrect
. In order for a relationship to be a function, each input value must result in
only one input/ multiple outputs
. In this equation, each input value does result in only one output value. It is
allowed/not allowed
for more than one input to have the same out. This does not mean that the relationship is not a function.
Terra is correct. In order for a relationship to be a function, each input value must result in only one input.
What is a function?A relation between a collection of inputs and outputs is known as a function. A function is, to put it simply, a connection between inputs in which each input is connected to precisely one output. Each function has a range, codomain, and domain. The usual way to refer to a function is as f(x), where x is the input. A function is often represented as y = f. (x).
We know that for a function each input value must result in a unique output value. Terra claims this statement, and hence she is correct.
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Determine the value of x in the figure.
The value of x in the figure shown above is equal to 4.
What are parallel lines?In Mathematics, parallel lines can be defined as two (2) lines that are always the same (equal) distance apart and never meet.
By critically observing the image of this geometric figure, we can reasonably infer and logically deduce that it is a type of quadrilateral with both pairs of opposite sides being parallel to each other and the opposite angles (vertical angles) are equal and congruent:
Side length A = Side length B
4 + 6 = 6 + x
10 = 6 + x
By collecting like terms, we have the following:
x = 10 - 6
x = 4 units.
In conclusion, the value of x is equal to 4 units.
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(−4x + 3)(−2x2 − 8x + 2)
On solving the expression, the standard form is obtained as 8x³ + 26x² - 32x + 6.
What is an expression?
Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a statement. It's possible to multiply, divide, add, or subtract with this mathematical operation.
The given expression is - (−4x + 3)(−2x² − 8x + 2)
To solve this expression first expand the equation using arithmetic operation of multiplication.
(−4x + 3)(−2x² − 8x + 2)
-4x(−2x² − 8x + 2) + 3(−2x² − 8x + 2)
8x³ + 32x² - 8x - 6x² - 24x + 6
Collect the like terms together -
8x³ + 32x² - 6x² - 8x - 24x + 6
Perform the arithmetic operation of addition and subtraction -
8x³ + 26x² - 32x + 6
Therefore, the standard form is 8x³ + 26x² - 32x + 6.
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I read a total of 42 books over 7 months. If Craig has read 48 books so far, how many months has he been with his book club? Solve using unit rates.
Answer:
8
Step-by-step explanation:
42/7 =
6..
Since +6 more to 42 = 48 =
42+6=
48.
Just add 1 more month =
7+1=
8
Need more explanation I am happy to help :)
A fresh fish retailer receives a shipment of sardines in sealed packs. Together, there were 3 pounds in 12 packs. If the retailer received 48 packs of sardines, how many pounds were in the shipment?
Answer:
So, the question is asking how many pounds are there in 48 shipments if ever 12 shipments are 3 pounds, so what you want to do is so how many times 12 will go into 48 and then multiply that by 3!
48/12 = 4
4 * 3 = 12
The total 48 shipments weigh 12 pounds!
Step-by-step explanation:
Hope it helps! =D
Answer:
The weight of one pack of sardines is 3 pounds / 12 packs = 0.25 pounds/pack
So the weight of 48 packs of sardines is 0.25 pounds/pack * 48 packs = 12 pounds.
Please can somebody help me do this further maths gcse question in ‘transformations of graphs and functions’
Answer:
y=f(x)-6 is a vertical translation down by 6 units so draw the same graph but 6 units down with the point at which it crosses the y-axis as (0,-4)
Buddy walks 5000 feet due North, then turns and walks 4000 feet due East. If he walked in a straight line from his starting position to his final position, how many miles would he walk?
Answer: 1.2 miles
You can find the answer by using the pythagorean theorem.
a^2 + b^2 = c^2.
(5000)^2 + (4000)^2 = c^2
25 million +16 million = c^2
41 million = c^2
Take the square root of both sides in order to get the value of C.
C = about 6,403 feet.
1 mile = 5280 feet
6403/5280 = 1.2
Buddy would walk about 1.2 miles
Line segment SU is dilated to create S'U' using the dilation rule DQ,2. 5. What is the distance, x, between points U' and U?
4 units
4. 8 units
6 units
10 units
If Line segment SU is dilated to create S'U' using the dilation rule DQ₂.₅ , then the distance "x" between points U' and U is (c) 6 units .
The Scale Factor is written as ratio of the distance from center to image of a point and distance from center to corresponding point.
the scale factor from the figure can be written as : QU'/QU ;
From the figure , we can see that QU = 4 units and scale factor is = 2.5 ;
⇒ 2.5 = QU'/4 ;
On simplifying ,
we get ;
⇒ QU' = 2.5 × 4 = 10 ;
From the figure : UU' = QU' - QU ;
⇒ UU' = 10 - 4 = 6 .
Therefore , the distance between points U and U' denoted by "x" is 6 units .
The given question is incomplete , the complete question is
Line segment SU is dilated to create S'U' using the dilation rule DQ₂.₅ , What is the distance, x, between points U' and U?
(a) 4 units
(b) 4.8 units
(c) 6 units
(d) 10 units
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Select the correct answer from the drop-down menu.
This scatter plot was created using daily stock market returns. Which type of function fits the data of the graph best?
Percent Daily Return
6.00%
4.00%
2.00%
0.00%
-2.00%
-4.00%
A
-6.00%
-8.00%
-10.00%
1-Mar-18
●
6-Mar-18 11-Mar-18 16-Mar-18 21-Mar-18 26-Mar-18 31-Mar-18 5-Apr-18
A best explains the relationship between the stock's return and time.
A Linear Function best explains the relationship between the return and time.
What is the scatter plot?
A scatter plot is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data. If the points are coded, one additional variable can be displayed.
It is given that this scatter plot was created using daily stock market returns.
To determine which type of function fits the data of the graph best see the points of the graphs.
The scatter plot is not forming a parabola or curved graph so it can be a quadratic function.
The scattered in such a form that only a straight line can be the best fit for the scatter plot.
Therefore, a linear function is the best representation.
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Combine like terms to create an equivalent expression.
3.4 2.8d +2.8d-1.3
Answer:
Step-by-step explanation:
If the problem was supposed to be "3.4 + 2.8d + 2.8d -1.3". Then the answer would be 5.6d + 2.1. you can combine the "d" terms because they have the same variable and you can combine the number terms because they are like. This result in 2.8d+2.8d + 3.4 - 1.3. This simplifies to the correct answer given above.
note: enter your answer and show all the steps that you use to solve this problem in the space provided. use the circle graph shown below to answer the question. the image is a color pie chart divided into 5 portions, and is titled pets owned by sixth graders.
starting from the 12 o'clock position at the top and going clockwise toward the right is dark blue portion labeled dogs, 45 percent. next portion if 30 sixth graders own birds, how many sixth graders were surveyed?
Total number sixth graders were surveyed is 600.
"percent" is Latin for "out of 100," so 5 % is literally 5 out of 100
Now--if it were 5 kids with birds, you would know that there were 100 total kids. But it's 30 kids, which is way more than 5; so your total number of kids is going to be way more than 100.
So what you need to do here is figure that "30 sixth graders own birds
i.e. 30 is 5% of some number."
How many times bigger than 5 is 30? (6 times, because 5 x 6 = 30, or you can think of it as 30 divided by 6 = 5)
So if you had to do 5 TIMES 6 to get to 30, you have to do 100 TIMES 6 to get the total number sixth graders were surveyed.
What's 100 x 6?
= 600.
So your total number sixth graders were surveyed is 600.
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An air traffic controller is tracking two planes. To start, Plane A is at an altitude of 2184 feet and Plane B is just taking off. Plane A is gaining altitude at 30.25 feet per second and Plane B is gaining altitude at 75.75 feet per second.
They will be equal at the same altitude at x= 48 seconds
How to determine when they will be equal?Assume the question is when the planes will be at the same altitude.
A is 2184+30.25x, where x is the number of seconds.
The aircraft B is 75.75x
They will be equal at the same altitude if
75.75x=2184+30.25x
Collecting like terms and making x the subject of the relation
75.75x -30.25x = 2184
45.5x = 2184
Making x the subject
x = 2184/45.5
x=48 seconds
The two airplanes will be at the same altitude at 48 seconds
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!!! asap
Bryce graphs an arithmetic sequence and draws a line through the points. The line has a negative slope and a positive y-intercept. Write an arithmetic sequence that could represent Bryce's sequence
The possible equation of the sequence is f(x) = -2x + 5
How to determine the possible sequenceFrom the question, we have the following parameters that can be used in our computation:
Sequence type = arithmetic
Also, we have the following features
slope = negative
y-intercept = positive
A linear equation (or an arithmetic sequence) can be represented as
y = mx + c
Where
slope = m
y-intercept = c
Using the given features, we can use the following assumed values
m = -2
c = 5
So, the sequence is
f(x) = -2x + 5
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Multiselect Allce takes an art class after school once a week. At each class,
she buys a bottle of juice for $1.25 and a bag of pretzels for $0.85. Select all
expressions that represent the amount of money, in dollars, Alice spends after
attending 8 art classes.
Answer:
$16.8
Step-by-step explanation:
u got to trust me
Answer: $16.8
im sure its this it has to be