The value of k that would make the left side of the equation x² - kx + 100 a perfect square trinomial is k = 20 or -20.
For the given quadratic equation x² - kx + 100 = 0, you want to find the value of k that makes the left side a perfect square trinomial.
A perfect square trinomial can be factored into the square of a binomial. In this case, we want the quadratic to be in the form of (x - a)².
Let's compare the given quadratic with the perfect square trinomial:
Given quadratic: x² - kx + 100
Perfect square trinomial: (x - a)² = x² - 2ax + a²
Comparing the coefficients of corresponding terms, we have:
For x² terms: 1 = 1 (they match)
For x terms: -k = -2a (they should match)
From this, we can solve for 'a':
a = k/2
Now, for the constant terms:
For constant terms: 100 = a²
Substitute the value of 'a':
100 = (k/2)²
Solve for 'k':
100 = k²/4
k² = 400
k = ±20
So, the values of 'k' that would make the left side of the equation a perfect square trinomial are k = 20 and k = -20.
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Plot 5 parabolas, one through each set of color-coordinated points. (image attached)
Answer:
Red: y=(x+6)^2-1
Blue: y=-(x+3)^2+1
Green: y=(x^2-1)
Orange: y=-(x-3)^2+1
Purple: y=(x-6)^2-1
Step-by-step explanation:
Use Desmos to check
Corrie bought a new flat screen 70 inch television and a speaker system from a local electronics store on credit. The store will charge 18% per year compounded monthly. Their monthly payments are $204.80 for 4 years. What is the cash price of her purchase?
1. Identify the type of problem.
a. Future Value with compound interest.
b. Present Value with compound interest.
c. Present Value of an Annuity.
d. Future Value of an Annuity.
e. Future Value with simple interest.
2. Answer the question in the problem.
a. $4,881.09.
b. $5,262.72.
c. $9,261.57.
d. $7,247.31.
e. $6,971.91.
The cash price of her purchase would be $5262.79
How to find the compound interest?If n is the number of times the interested is compounded each year, and 'r' is the rate of compound interest annually, then the final amount after 't' years would be:
\(a = p(1 + \dfrac{r}{n})^{nt}\)
The Present value = C [1 - (1+i)^(-n)]/i
C = the amount of payment per period
i = interest rate
n=number of payments
In this problem we have;
C = $174.80
i = 12% per year compounded monthly
= 12/(12 x 100)
= 0.01
n = 3 x 12 = 36 months
Present Value = 174.80[1 - (1+0.01)^(-36)]/0.01
Cash price = $5262.79
Hence, the cash price of her purchase would be $5262.79
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PLEASE HELPPPP
WILL GIVE 15 POINTS
Answer: #1 = 15 #2= 5
Step-by-step explanation:
3 x 5/12= 15/12
15 x 1/12=15/12
5 x 3/12=15/12
TRUST ME I'm smart
Each side of a square courtyard is 16 meters long. It costs $14.00 per meter to replace the brick wall around the courtyard. How much would it cost to replace the brick wall?
Answer:
$3584
Step-by-step explanation:
We need to first find the area of the courtyard. We know that Area = length * width, so:
16 * 16 = 256 meters
Now, multiply by $14 to find total cost:
$3584
solve for w: -5+\(\frac{w}{3}\)=-1
(A) 12
(B) -12
(C) 2
(D) -2
Answer:
a-12
Step-by-step explanation:
hope it helps
what are 10 favorite songs that you really like?
Answer:
him by big yavo
Step-by-step explanation:
StartRoot 12 EndRoot is
greater thanStartRoot 7 EndRoot
Answer:
True
Step-by-step explanation:
√12 > √7
True
The differential cross section for e+e−→μ+μ−is (if s≫me,mμ and s≪mZ ) dΩdσ=4sα2(1+cos2θ) where s=(pe++pe−)2,θ is the polar angle of the muon emission direction with respect to the electron and positron momentum axis, α is the fine structure constant, and me,mμ and mZ are respectively the masses of the electron, muon and Z boson. (i) What type of interaction is responsible for this process? Is parity conserved in this type of interaction? Draw the lowest order Feynman diagram of this process. (ii) It is experimentally verified that an additional term proportional to cosθ has to be added to the right side of equation (1) if s is increased to values closer to mZ. What interaction is responsible for this? Is parity conserved at these higher s values?
In this process, the electron and positron interact through a photon to create a muon-antimuon pair. The interaction responsible for this is the electroweak interaction, and parity is not conserved at higher s values.
The process of e+e− → μ+μ− is caused by electromagnetic interaction, and the parity is conserved in this type of interaction.
The following is the lowest order Feynman diagram of this process:In this process, the electron and positron interact through a photon to create a muon-antimuon pair.
The electron and positron are considered initial particles, while the muon and antimuon are considered final particles.
(The additional term proportional to cosθ that must be added to the right side of equation (1) if s is increased to values closer to mZ is due to the interference between the photon and the Z boson.
The interaction responsible for this is the electroweak interaction, and parity is not conserved at higher s values.
Therefore, the differential cross-section for e+e− → μ+μ− is dΩ/dσ = 4sα2 (1 + cos2θ) where s ≫ me, mμ and s ≪ mZ. The process is caused by the electromagnetic interaction and parity is conserved in this type of interaction. The Feynman diagram for this process is shown above. An additional term proportional to cosθ has to be added to the right side of equation (1) if s is increased to values closer to mZ due to the interference between the photon and the Z boson. The interaction responsible for this is the electroweak interaction, and parity is not conserved at higher s values.
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Volume of a cube (cm') = width (cm) x height (cm) x length (cm). 1.1) Using the equation above, determine the volume of a cube that measures 3 cm wide, 3 cm tall, and 3 cm long. 1.2) Let's say this cube is made out of ice and has a mass of 24.76 grams (g). What is this ice cube's density? 1.3) The density of liquid water is slightly higher than that of frozen water ice. Liquid water's density at standard pressures and temperatures is 1.00 grams per cubic centimeter (g/cm'). Given that density, what is the mass of a cube of water measuring 3 cm wide, 3 cm tall, and 3 cm long? 1.4) Compare the weight of the water you calculated in question 1.3 with the weight of the ice of the same volume given in question 1.2. Which is heavier, the liquid water or the ice? Notice that the cube of water is the same size (or volume) as the cube of ice. 1.5) You know that ice floats on water. Explain why.
1.1) The volume of the cube is 27 cubic centimeters. 1.2)the density of the ice cube is approximately 0.917 grams per cubic centimeter (g/cm³).
1.3) the mass of the water cube is 27 grams. 1.4) the weight of the water and the ice would be the same under the same conditions. 1.5)In simpler terms, ice floats on water because it is lighter (less dense) than the water, allowing it to displace an amount of water equal to its weight and float on the surface.
1.1) The volume of the cube can be calculated using the equation: Volume = width x height x length. In this case, the cube measures 3 cm wide, 3 cm tall, and 3 cm long, so the volume is:
Volume = 3 cm x 3 cm x 3 cm = 27 cm³.
Therefore, the volume of the cube is 27 cubic centimeters.
1.2) Density is defined as mass divided by volume. The mass of the ice cube is given as 24.76 grams, and we already determined the volume to be 27 cm³. Therefore, the density of the ice cube is:
Density = Mass / Volume = 24.76 g / 27 cm³ ≈ 0.917 g/cm³.
Therefore, the density of the ice cube is approximately 0.917 grams per cubic centimeter (g/cm³).
1.3) The volume of the water cube is the same as the ice cube, which is 27 cm³. Given the density of liquid water as 1.00 g/cm³, we can calculate the mass of the water cube using the equation:
Mass = Density x Volume = 1.00 g/cm³ x 27 cm³ = 27 grams.
Therefore, the mass of the water cube is 27 grams.
1.4) The weight of an object depends on both its mass and the acceleration due to gravity. Since the volume of the water cube and the ice cube is the same (27 cm³), and the mass of the water cube (27 grams) is equal to the mass of the ice cube (24.76 grams), their weights would also be equal when measured in the same gravitational field.
Therefore, the weight of the water and the ice would be the same under the same conditions.
1.5) Ice floats on water because it is less dense than liquid water. The density of ice is lower than the density of water because the water molecules in the solid ice are arranged in a specific lattice structure with open spaces. This arrangement causes ice to have a lower density compared to liquid water, where the molecules are closer together.
When ice is placed in water, the denser water molecules exert an upward buoyant force on the less dense ice, causing it to float. The buoyant force is the result of the pressure difference between the top and bottom surfaces of the submerged object.
In simpler terms, ice floats on water because it is lighter (less dense) than the water, allowing it to displace an amount of water equal to its weight and float on the surface.
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Henry is buying bagels for a family gathering. Each bagel costs $0.75. Answer the
questions below regarding the relationship between the total cost and the number of
bagels purchased.
Answer:
0.75x=(total cost)
Step-by-step explanation:
Answer:
The independent variable, x, represents the number of bagels purchased, and the dependent variable is the total cost of the bagels, because the total cost of the bagels depends on the number of bagels purchased.
A function relating these variables is A(x) =0.75x .
So A(12) = 9, meaning 12 bagels will cost 9 dollars.
Step-by-step explanation:
Please give me THANKS and BRAINLIES
Have a good day
If x and y vary directly and y is 44 when x is 11, find y when x is 9.
The value of y when x is 9 and the constant of proportionality(k) is 4 is 36.
What are ratio and proportion?A ratio is a comparison between two similar quantities in simplest form.
Proportions are of two types one is the direct proportion in which if one quantity is increased by a constant k the other quantity will also be increased by the same constant k and vice versa.
In the case of inverse proportion if one quantity is increased by a constant k the quantity will decrease by the same constant k and vice versa.
Given, x and y vary directly and y is 44 when x is 11.
Let, y ∝ x.
y = kx.
44 = 11k.
k = 44/11.
k = 4.
Now x = 9.
y = 4×9.
y = 36.
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The common stock of CrisisGreat is expected to earn 18 percent in a recession, 7 percent in a normal economy, and lose 8 percent in a booming economy. The probability of a boom is 23 percent while the probability of a recession is 8 percent. What is the expected rate of return on this stock
The expected rate of return on the common stock of CrisisGreat is 4.43%.
How to find rate of return?To calculate the expected rate of return on the stock of CrisisGreat, we need to use the formula:
Expected rate of return = (Probability of recession * Rate of return in recession) + (Probability of normal economy * Rate of return in normal economy) + (Probability of boom * Rate of return in boom)
Let's plug in the given values:
Expected rate of return = (0.08 * 0.18) + (0.69 * 0.07) + (0.23 * (-0.08))Expected rate of return = 0.0144 + 0.0483 - 0.0184Expected rate of return = 0.0443 or 4.43%Therefore, the expected rate of return on the common stock of CrisisGreat is 4.43%.
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Find the x-intercept and y- intercept from the following linear equation: -7x+4y=56
Answer:
-52/7
Step-by-step explanation:
Dont care just do it or check it
Solve the triangle. A = 51°, b = 14, c = 6, I'll give 20 points
Answer:
Step-by-step explanation:
We have that
A = 51°, b = 14, c = 6
step 1
find the value of a
Applying the law of cosines
a²=c²+b²-2*c*b*cos A
a²=6²+14²-2*6*14*cos 51-------> 126.27
a=11.2
we know that
The sum of the lengths of any two sides of a triangle is greater than the length of the third side.
we have
a=11.2
b=14
c=6
so
(a+b) > c-------------> (11.2+14)=25.2
25.2 > 6-----> is not correct
therefore
the answer is the option
a. No triangles possible
I don't know if i am right sorry if this is wrong
a boy has 4 red , 2 yellow and 5 green marbles. in how many ways can the boy arrange the marbles in a line if:
Answer:
Step-by-step explanation:
Sorry I am not sure, I accidentally clicked and I can’t exit
Calculate the average value of f(x) = 4x sec^2 x on the interval [0,pi/4].
the average value of f(x) = 4x sec^2 x on the interval [0,pi/4] is 1/2
To calculate the average value of f(x) = 4x sec2 x on the interval [0,pi/4], we can use the following formula:
Average value = (1/b-a)∫baf(x)dx
Where a is the lower bound (0) and b is the upper bound (pi/4).
Therefore, the average value of f(x) = 4x sec2 x on the interval [0,pi/4] is:
Average value = (1/(pi/4 - 0))∫pi/404x sec2 xdx
Average value = (1/pi/4)∫pi/404x sec2 xdx
Average value = (1/pi/4)(2pi/4)
Average value = 1/2
the average value of f(x) = 4x sec^2 x on the interval [0,pi/4] is 1/2
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Can someone help me solve this plz
Answer:
58
Step-by-step explanation:
all triangles add up to 180 degress
180-64=116
because its an isosceles triangle divide by two
116/2=58
Deductive reasoning uses all of the following except...
A. Laws
B. Patterns
C. Facts
D. Rules
The graph of a line has an x-intercept of 8 and y-intercept of -3. Is the line vertical or horizontal? Explain.
Answer:
more towards the vertical side, since it is going down vertically
Step-by-step explanation:
Answer:
Its is neither vertical or horizontal beacuse there are two very different intercepts.
Step-by-step explanation:
Egor works overtime for two weeks. He earns $190 in the first week and $224.50 in the second. He pays a 20% tax on each amount how much tax has he paid at the end of the two weeks
Answer:
307.6
Step-by-step explanation:
190+224.50= 384.5 - 20% = 307.6
01:59.13 The ratio table below shows the relationship between the weight of apples purchased and the total cost of the apples Apple Cost Weight (lb) Total cost ($) 1 2 4 8 6 12 10 20 When the weight of apples is increased by a factor of 4, by what factor does the total cost increase? 3 8
Answer:
it should be 8 if not take your best guest hope this helps!!
Step-by-step explanation:
Look at this angle:
What is the vertex?
Answer:
v is the vertex I think so
Answer:
The vertex is V.
Step-by-step explanation:
The point in which a graph hits the x-axis is know as the
Problem:
The point at which a graph hits the x-axis is known as :
Solution:
The zero of the function. This point is characterized by the coordinate
(x, y) = (0, y). Notice that at this point, the coordinate x is always zero.
Solve each equation for p.
P+3/m=-1
Answer:
P= -m-3
I hope this helps!
ava's younger cousins are away at summer camp. she went to the post office and bought 3 flat-rate shipping boxes to send a care package to each of them. she also bought an $11 book of stamps. ava spent a total of $34.70. which equation can you use to find p, how much the post office charged for each shipping box? awesome!
The equation that can be used to find the cost of shipping boxes is: 3p + 11 = 34.70. By solving the equation, we get p = $7.23.
The problem is about finding the cost of shipping boxes. Ava purchased 3 flat-rate shipping boxes, and a book of stamps, spending a total of $34.70. The problem asks to find out how much the post office charged for each shipping box, given that the cost of a book of stamps is $11.
To find the cost of a single flat-rate shipping box, let's assume that the post office charged p dollars for each shipping box. Therefore, the cost of three shipping boxes will be 3p dollars.
Along with this, Ava also bought a book of stamps which cost her $11.
So, the total amount she spent can be written as the sum of the cost of the shipping boxes and the cost of the book of stamps. This is given by:
3p + 11 = 34.70
Solving for p, we get:
p = (34.70 - 11)/3p = $7.23 (approx)
Therefore, each shipping box costs $7.23.
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a questionnaire concerning satisfaction with the financial aid office on campus was mailed to 50 students on a university campus. the 50 students are an example of a
The 50 students are an example of a sample population
Questionnaire SampleA sample is a subset of a population that is used to represent the entire population. In this case, the 50 students who received the questionnaire are a sample of the population of students on the university campus. The results of the questionnaire would be used to make inferences about the satisfaction of the entire student population with the financial aid office on campus. The importance of the sample lies in the fact that it allows researchers to make inferences about a larger population based on a smaller, more manageable group of individuals. This is done by selecting a sample that is representative of the population of interest.
By studying a sample, researchers can make predictions about the characteristics of the larger population, such as the percentage of students who are satisfied with the financial aid office on campus. This can be done with a high degree of accuracy if the sample is chosen and analyzed properly. Additionally, studying a sample can also be much more cost-effective and time-efficient than studying the entire population. However, it's important to keep in mind that the sample may not be perfectly representative of the population and it may introduce some errors, called sampling errors, in the inferences made about the population.
So, 50 students as an example of a population sample to fill out the questionnaire.
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What are the 4 transformations of a function?
The four transformations of a function are translation, reflection, stretching/shrinking, and rotation.
What is function?Function is a group of related statements that perform a specific task. It is a block of organized, reusable code which can be used to perform a single, related action. Functions help make code more reusable and efficient. It also reduces the complexity of a program by breaking it down into smaller and simpler parts.
Translation involves shifting the graph of a function along a given axis; reflection involves flipping the graph of a function about a given axis; stretching/shrinking involves changing the scale of a graph along a given axis; and rotation involves rotating the graph of a function about a given point. All of these transformations can be used to modify the graph of a function, allowing for a variety of different outputs.
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Need help with these two problems
Step-by-step explanation:
you don't know the Pythagoras formula yet ?
this is something you need to remember for life. this you will encounter everywhere (not just in school) :
c² = a² + b²
in a right-angled triangle c is the Hypotenuse (the side opposite of the 90° angle). a and b are the legs of the triangle.
4.
the legs of this right-angled triangle are the pole and the ground distance to the cable fixture on the ground.
the cable itself is the Hypotenuse (as the right angle is the angle between the pole and the ground distance).
so,
cable² = 8² + 6² = 64 + 36 = 100
cable = sqrt(100) = 10 m
5.
here we have a right-angled triangle with the direct distance between the points being the Hypotenuse, and the x and y coordinate differences are the legs.
so, we have
distance² = (3 - -3)² + (0 - -1)² = 6² + 1² = 36 + 1 = 37
distance = sqrt(37)
please note that since we are squaring, the direction of the differences and their signs do not matter. the square will turn positive and negative distances into positive numbers.
use the law of exponents to simplify the following expression
Answer:
5x⁴
Step-by-step explanation:
10x⁸÷2x⁴=
5x⁴
sheena is shocking a shelf with bags of flour that weigh 5 1/4 pounds each if sheena stocks the shelf with 13 bags of flour find the combined weight of 13 bags
Answer:
\(68\frac{1}{4}\) pounds
Step-by-step explanation:
The combined weight of 13 bags is 13 multiplied by the weight of each bag.
The weight of each bag is \(5\frac{1}{4}\) pounds. Therefore, the weight of 13 bags is:
\(5\frac{1}{4} * 13\\ \\= \frac{21}{4} * 13\\\)
\(= 68\frac{1}{4}\) pounds