piecewise function defines the function graphed between y=2x+3 and y=-1/3x+3.
How to compare linear equations?
The comparison method, a procedure for solving systems of independent equations, starts by rewriting each equation with the same variable as the subject. Any of the variables may be chosen as the first variable to isolate. Each equation is now an isolated-subject equation, and equation where one variable is isolated.
Given:
y = 2x+3
y = -1/3x+3
The left portion of the blue curve is y = 2x+3 but it is only graphed when x < 0 (we could argue that but I'll set that aside for the other portion).
The right portion is the line y = -1/3x + 3 and it's only graphed when
Both lines have y-intercept 3.
The slopes are 2 and -1/3.
The equations are
y = 2x + 3; y = -1/3 x + 3e could have this piecewise function
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Mr. Kazoo is planning to build a fence
gate 40 inches wide. He plans to use
boards 7 inches wide. How many
boards should he buy?
Mr. Kazoo needs to buy 6 boards to complete his fencing as he can not buy exactly 5.71 boards.
What is a numerical expression?A numerical expression is a mathematical statement written in the form of numbers and unknown variables.
We can form numerical expressions from statements.
Given, Mr. Kazoo is planning to build a fence.
The gate is 40 inches wide.
Therefore, He needs to buy (40/7) = 5.71 boards.
But, He can not buy a board 0.71 part of the whole part, So he needs to buy 6 boards to complete his fencing.
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Question 2
Two fair six-sided dice are thrown. Let A be the event that the sum is 3. Let B be the event that the sum is 12.
Find P(AUB).
None of the answers listed is correct.
2/12
3/36
4/36
2/36
E1, E3, and E2, E3 are independent variables.
What is meant by independent variable?In statistical modelling, experimental sciences, and mathematical modelling, there are dependent and independent variables. Dependent variables are examined under the presumption or requirement that they are constrained by some rule or law to depend on the values of other variables. What it means to be an independent variable is exactly what it is. It is a variable that is independent of the other factors you are attempting to assess. Age is just one example of an independent variable.The independent variable is the underlying cause. Its value is independent of the other study factors. The dependent variable is the effect. The value of the independent variable depends on its modifications.[tex]$& \mathrm{P}\left(\mathrm{E}_1\right)=\frac{1}{6} \\[/tex]
[tex]$& \mathrm{P}\left(\mathrm{E}_2\right)=\frac{1}{6} \\[/tex]
[tex]$& \mathrm{P}\left(\mathrm{E}_3\right)=\frac{2+4+6+4+2}{36}=\frac{1}{2} \\[/tex]
[tex]$& \mathrm{P}\left(\mathrm{E}_2 \cap \mathrm{E}_3\right)=\frac{1}{2} \times \frac{1}{6}=\mathrm{P}\left(\mathrm{E}_2\right) \times \mathrm{P}\left(\mathrm{E}_3\right) \\[/tex]
Then,
[tex]$& \mathrm{P}\left(\mathrm{E}_1 \cap \mathrm{E}_3\right)=\frac{1}{2} \times \frac{1}{6}=\mathrm{P}\left(\mathrm{E}_1\right) \times \mathrm{P}\left(\mathrm{E}_3\right) \\[/tex]
[tex]$& \mathrm{P}\left(\mathrm{E}_1 \cap \mathrm{E}_2 \cap \mathrm{E}_3\right)=0 \\[/tex]
[tex]$& \mathrm{P}\left(\mathrm{E}_1\right) \mathrm{P}\left(\mathrm{E}_2\right) \mathrm{P}\left(\mathrm{E}_3\right) \equiv 0 \\[/tex]
Simplify,
[tex]$& \therefore \mathrm{P}\left(\mathrm{E}_1 \cap \mathrm{E}_2 \cap \mathrm{E}_3\right) \equiv \mathrm{P}\left(\mathrm{E}_1\right) \mathrm{P}\left(\mathrm{E}_2\right) \mathrm{P}\left(\mathrm{E}_3\right)[/tex]
E1, E3 are independent
E2, E3 are independent
The complete question is:
Let two fair six-faced dice A and B are thrown simultaneously. If E1 is the event that die A shows up four, E2 is the event that die B shows up two and E3 is the event that the sum of numbers on both dice is odd, then which of the following statements is NOT true?
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4x - 5 > 3 OR -4x < -28
Answer: x=35
Step-by-step explanation:
Solve the given inequality. Enter your solution in interval notation. Use exact values.
The solution set for the inequality [tex]3(x+5)^3(x+4)^6(x+3)^3 > 0[/tex] is (-4, -3) ∪ (-3, ∞).
What is inequality?
An inequality is a mathematical statement that describes a relationship between two values or expressions, where one is greater than, less than, or not equal to the other.
To solve the inequality [tex]3(x+5)^3(x+4)^6(x+3)^3 > 0[/tex], we can use the concept of interval notation and test each interval to see if it satisfies the inequality. Here are the steps:
Find the critical points of the expression, which are the values that make the expression equal to zero. In this case, the critical points are -5, -4, and -3.
Use these critical points to divide the number line into four intervals: (-∞, -5), (-5, -4), (-4, -3), and (-3, ∞).
Test a value in each interval to see if the inequality is true or false. We can use the sign of the expression to determine this:
For x < -5, all three factors are negative, so the product is negative. Therefore, this interval does not satisfy the inequality.
For -5 < x < -4, the first factor is positive and the other two factors are negative. The product is therefore negative. This interval does not satisfy the inequality.
For -4 < x < -3, the first and third factors are positive and the second factor is negative. The product is therefore positive. This interval satisfies the inequality.
For x > -3, all three factors are positive, so the product is positive. Therefore, this interval satisfies the inequality.
Write the solution set using interval notation. We have found that the solution set is (-4, -3) union ( -3, ∞).
Therefore, the solution set for the inequality [tex]3(x+5)^3(x+4)^6(x+3)^3 > 0[/tex] is (-4, -3) ∪ (-3, ∞).
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Two hikers traveled 3 kilometers north and 4
kilometers east, but then went directly home as
shown by the dotted line on the diagram below.
N
3 km
4 km
Home
How far did they travel to get home? Justify your
answer.
Answer:
Step-by-step explanation:
To find the total distance traveled by the hikers to get home, we can use the Pythagorean theorem, which states that in a right-angled triangle, the square of the length of the hypotenuse (the straight line distance) is equal to the sum of the squares of the lengths of the other two sides.
Since the hikers traveled 3 km north and 4 km east, we can consider this as the sides of a right-angled triangle, with the hypotenuse being the straight line distance traveled to get home. So, the square of the distance traveled to get home is equal to the sum of the squares of the sides, i.e., 3^2 + 4^2 = 9 + 16 = 25. Taking the square root of 25 gives us 5 km, so the distance traveled by the hikers to get home is 5 km.
12) What is the 12th term of the following sequence? *
5,-1, -7,...
Answer:
12th term = -61
Step-by-step explanation:
Given sequence,
→ 5, -1, -7, ...
Now we have to,
→ Find the 12th term of the sequence.
The common difference is,
→ d = a2 - a1
→ d = -1 - 5
→ [ d = -6 ]
Formula we use,
→ an = a1 + (n - 1)d
Then value of 12th term will be,
→ an = a1 + (n - 1)d
→ a12 = 5 + (12 - 1) × (-6)
→ a12 = 5 + 11 × (-6)
→ a12 = 5 - 66
→ [ a12 = -61 ]
Therefore, the 12th term is -61.
After four years in college, Josie owes $50000 in student loans. The interest rate on the federal loans is 2.8% and the rate on the private bank loans is 4.8%. The total interest she owes for one year was $1,600.00.What is the amount of each loan?
Federal loan at 2.8% account = $
Private bank loan at 4.8% account = $
The federal loan at 2.8% is approximately 11000, and the private bank loan at 4.8 percent is around 39000 (which is 50000 - 11000).
How to solve the problem?Let's use f and p to denote the amounts of Josie's federal and private bank loans, respectively.
We know that the total amount of loans is 50000, so:
f + p = 50000
We also know that the interest on federal loans at 2.8% and the interest on private bank loans at 4.8% add up to 1600 per year. The interest on the federal loans is 0.028f and the interest on the private bank loans is 0.048p, so:
0.028f + 0.048p = 1600
We can use the first equation to solve for one of the variables in terms of the other. For example, we can solve for p:
p = 50000 - f
Substituting this into the second equation, we get:
[tex]0.028f + 0.048(50000 - f) = 1600[/tex]
Simplifying and solving for [tex]f[/tex], we get:
[tex]f = \frac{1600 - 0.048 \cdot 50000}{0.02} \approx 11000[/tex]
Therefore, the federal loan at 2.8% is approximately 11000, and the private bank loan at 4.8% is approximately 39000 (which is 50000 - 11000).
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Sue has 18 sweets.
Tony also has 18 sweets.
Sue gives Tony x sweets.
Sue then eats 5 of her sweets.
Tony then eats half of his sweets.
Write expressions for the number of sweets Sue and Tony now have.
Sue:
Tony:
Answer:
Step-by-step explanation:
18-5=13
18-9=9
Determine which consecutive integers do not have a real zero of f(x)=x²-4x²-4x+15 between them.
a. (4, 5)
C. (-2,-1)
b.
(1, 2)
d.
(-3,-2)
Answer:
option
Step-by-step explanation:
f(x)=-3x²-4x+15
if (-3,-2) is substitute
x=-3 x=-2 is substitute in above given equation we get real zero.
2. Calculate the surface area and volume of a square pyramid
10cm
12cm
10cm
Answer:
Surface are = 340 cm²; Volume = 363.33 cm³.------------------------------
Full surface area is the sum of areas of 4 triangles and the square base:
S = 4*1/2*10*12 + 10² S = 240 + 100S = 340 cm²Find the height h of the pyramid, using slant height and the side of the base and Pythagorean:
h² = 12² - (10/2)²h² = 144 - 25h² = 119h = √119 ≈ 10.9 cmFind the volume:
V = 1/3*a²hV = 1/3*10²*10.9V = 363.33 cm³What else must you know to prove the triangles congruent by ASA? By SAS?
The proof of congruence by SAS, then 2 corresponding sides and the corresponding included angles of both triangles are equal.
What are congruent angles?Angles who are of same measurement are called congruent.
Suppose that two angles ∠A and ∠B are of same measure, then
[tex]m\angle A = m\angle B[/tex]is the notation to say that they are of same measurement, where the small m shows that its the measurement of the angles they're preceding.
The SAS postulate , Two sides and the included angle of one triangle are identical to the corresponding two sides and the included angle of another triangle.
In the triangle, the angles mCAD and mACB are congruent.
m∠CAD ≅ m∠ACB
Since m∠CAD and m∠ACB are congruent, AD and BC must also be congruent.
As a result, the SAS Congruence postulate is proven.
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4232852 round off yo the nearest 1000
Answer:
4,233,000
Step-by-step explanation:
4,232,000 4,4232,852 4,233,000
4,4232,852 is between 4,232,000 and 4,233,000. It is closer to 4,233,000.
The rule is to look a the digit in the hundreds' place. That number is 8. If the digit in the hundreds' place is 5 or larger, you round up.
There are 7 1/5 groups of 2/5 in 3 do you agree with this statement show reasoning
The statement made by Diego is correct.
In order to determine the number of groups of 5/6 that are in 1, 1 would be divided by 5/6.
1 ÷ 5/6
= 1 x 6/5 = 6/5
6/5 is called an improper fraction because the numerator is greater than the denominator.
6/5 can also be rewritten as a mixed fraction. If it is rewritten as a mixed fraction, it becomes 1 1/5.
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Given question is incomplete , the complete question is given below:
Diego said that the awnser to the question "How many groups of 5/6 are in 1?" Is 6/5 or 1 1/5.Do you agree with his statement? Explain or show your reasoning.
(SAT Prep) Find the value of x.
20⁰
X
40°
The value of the angle is 120°.
What are Corresponding angle?The corresponding angle of a given angle refers to the angle in a congruent position in another figure. For example, if two lines intersect, the angle formed at one vertex of the intersection is called a vertex angle. The corresponding angle in the other figure is the angle in a congruent position, meaning that it has the same measure.
We are given two lines to be parallel
Hence the angle adjacent to x is 40°
Now Sum of All three angle is 180° (Angles in linear pair)
Hence we have
40 + x + 20 = 180°
x = 120°
Hence the measure of angle x is 120°
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Help needed on this question:
How to determine this
Using product rule,
[tex]\frac{d}{dx}[/tex](u.v) = du/dx.v + dv/dx.u
where u = x-5
v = x+7
Using the rule,
d/dx = 1(3x + 7) + 3(x - 5)
d/dx = 3x +7 +3x - 15
d/dx = 6x - 8
Using the expanding, then differentiating,
d/dx = (x - 5)(3x + 7)
open bracket,
d/dx = 3x^2 + 7x - 15x - 35
Differentiating it,
d/dx = 6x + 7 - 15
d/dx = 6x - 8
Therefore, using different rule,it has been verified that both methods gave the same results.
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How do i show my work?
well, let's take a looksie at both
[tex]~~~~~~ \stackrel{\textit{\LARGE Henry}}{\textit{Simple Interest Earned}} \\\\ I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\dotfill & \$5000\\ r=rate\to 4.2\%\to \frac{4.2}{100}\dotfill &0.042\\ t=years\dotfill &4 \end{cases} \\\\\\ I = (5000)(0.042)(4) \implies I = 840 \\\\[-0.35em] ~\dotfill\\\\ ~~~~~~ \stackrel{\textit{\LARGE Ingrid}}{\textit{Simple Interest Earned}}[/tex]
[tex]I = Prt\qquad \begin{cases} I=\textit{interest earned}\\ P=\textit{original amount deposited}\dotfill & \$5000\\ r=rate\to 3.9\%\to \frac{3.9}{100}\dotfill &0.039\\ t=years\dotfill &6 \end{cases} \\\\\\ I = (5000)(0.039)(6) \implies I = 1170 \\\\[-0.35em] ~\dotfill\\\\ 1170~~ - ~~840\implies \text{\LARGE 330}[/tex]
Consider the function below.
f(x)=8/x−6
What would be the output if the input is 8?
8/14
8/6
2 1/3
4
The input is 8, the output of the function f(x) would be -5.
What is the function?
Function is a relationship or expression involving one or more variables. It has a set of input and outputs.
Functions are ubiquitous in mathematics and are essential for formulating physical relationships in the sciences. The modern definition of function was first given in 1837 by the German mathematician Peter Dirichlet
To find the output of the function f(x) when x is 8, we substitute x = 8 into the function and simplify:
f(x) = 8/x - 6
f(8) = 8/8 - 6
f(8) = 1 - 6
f(8) = -5
Hence, if the input is 8, the output of the function f(x) would be -5.
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Help, Solve the system of linear equations by Elmination.
Answer:
See the explanation below
Find the value of x for the following
Answer:
x = -5
Step-by-step explanation:
Since both horizontal lines are parallel, the marked angles are corresponding angles and are congruent. This, we can set them equal to each other:
47 = 10x + 97
Next, isolate “x” to find the value of “x”:
47 - 97 = 10x
-50 = 10x
-5 = x
3. Find the volume of a cone with radius 6 m and height 20 m
Answer: 753.98m³
Formula:V=πr2h3=π·62·203≈753.98224m³
Someone help me with this quadratic functions
The graph of the quadratic equation y = 6x² is an upward parabola with vertex (0,0) and axis of symmetry as y-axis.
What is a quadratic equation?
The polynomial equations of degree two in one variable of type f(x) = ax² + bx + c = 0 and with a, b, c, ∈ R and a ≠ 0 are known as quadratic equations. It is a quadratic equation in its general form, where "a" stands for the leading coefficient and "c" is for the absolute term of f(x). Where it equals zero is where the quadratic equation finds its solutions. They are also known as the equation's roots.
Assuming the question is to graph the quadratic function y = 6x².
The x-intercept can be found by substituting y = 0
0 = 6x²
x = 0
x-intercept = (0,0)
y-intercept can be found by substituting x=0
y = 6 * 0
y = 0
y-intercept = (0,0)
The given quadratic equation is the equation of an upward parabola with the vertex as (0,0).
The axis of symmetry is x = 0 i.e y-axis.
Hence the graph of the quadratic equation y = 6x² is an upward parabola with vertex (0,0) and axis of symmetry as y-axis.
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What is the surface area of the cube if s = 10?
The surface area of cube will be 600 square units.
What exactly is a cube?
A Cube is a solid three-dimensional shape with six square faces, eight vertices, and twelve edges in geometry. It is also described as a regular hexahedron. You've probably seen the 3 3 Rubik's cube, which is the most prevalent example in real life and is useful for improving brain capacity. Similarly, you will come across several real-life instances, such as 6 sided dice, etc. Solid geometry is concerned with three-dimensional objects and figures with surface areas and volumes. Other solid forms include cuboid, cylinder, cone, and sphere.
Surface area of cube=6*side²
Volume of cube=side³
Now,
As Side of cube=10 units
and Surface area of cube=6*side²
=6*10*10
=600 square units.
Hence,
The surface area of cube will be 600 square units.
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please help
it's 10 class
Answer:
=58%
Step-by-step explanation:
If rate of 5.8% = 1 day
than ? = 10 days
therefore 10/1 × 5.8%
= 10 × 5.8
= 58%
To the nearest whole number
= 58%
In April 1986, a flawed reactor design played a part in the Chernobyl nuclear meltdown. Approximately 14252 becqurels (Bqs), units of radioactivity, were initially released into the environment. Only areas with less than 800 Bqs are considered safe for human habitation.
The function f(x)=14252(0.5)^x/32 describes the amount, f(x) in becqurels of a radioactive element remaining in the area x years after 1988.
Find F(40) to one decimal place in order to determine the amount of becqurels in 2026.
The determine if the area is safe for human habitation in the year 2026.
PLEASE HELP ASAP IF YOU HELP I WILL GIVE BRANLIST AND BUT ONLY IF YOUR RIGHT BUT ONLY IF YOUR RIGHT. A set of 3 cards, spelling the word ADD, are placed face down on the table. Determine P(D, D) if two cards are randomly selected with replacement.
OPTIONS
1/3
2/3
2/6
4/9
Answer:
im pretty sure it is 4/9
Step-by-step explanation:
From the question, we are to determine the probability of selecting two cards with D and D
From the formula for probability, we have that
P(D) = Number of favorable outcomes to D / Total number of possible outcomes
From the given information,
Number of favorable outcomes to D = 2
Number of possible outcomes = 3
Thus,
P(D) = 2/3
Then,
The probability of selecting two cards that have D and D with replacement is
P(D, D) = P(D) × P(D)
P(D, D) = 2/3 × 2/3
P(D, D) = 4/9
Hence, the probability is 4/9.
______ 6x 8/5
ITS FOR KHAN ACADAMEY HELP
6x8 is 48. You can't simplify 48/5, so that's your answer. If you wanted to create a mixed number, you could write 9 3/5
Simplify the trigonometric expression below by writing the simplified form in terms of sin(x).
tan(x)+cot(x)/sec(x)=
The expression can be simplified to: [tex]tan(x) + cot(x)/sec(x) = sin(x) * (1 / \sqrt(1 - sin^2(x)) + \sqrt(tan^2(x)) / \sqrt(1 - sin^2(x)))[/tex]
How to simplifyWe can simplify the expression as follows:
tan(x) + cot(x)/sec(x) = tan(x) + 1/tan(x) / 1/cos(x) = tan(x) + cos(x) / tan(x) * cos(x) = tan(x) + cos^2(x) / tan(x)
Using the identity: tan(x)^2 + 1 = sec^2(x), we can simplify further:
tan(x) + cos^2(x) / tan(x) = tan(x) + cos^2(x) / (sqrt(sec^2(x) - 1)) = tan(x) + cos^2(x) / sqrt(tan^2(x) + 1 - 1) = tan(x) + cos^2(x) / sqrt(tan^2(x))
Using the identity sin^2(x) + cos^2(x) = 1, we can simplify further:
[tex]tan(x) + cos^2(x) / \sqrt(tan^2(x)) = tan(x) + (1 - sin^2(x)) / \sqrt(tan^2(x)) = tan(x) + \sqrt(1 - sin^2(x)) / \sqrt(tan^2(x)) = sin(x) * (1 / \sqrt(1 - sin^2(x)) + \sqrt(tan^2(x)) / \sqrt(1 - sin^2(x)))[/tex]
Therefore, the expression can be simplified to:
[tex]tan(x) + cot(x)/sec(x) = sin(x) * (1 / \sqrt(1 - sin^2(x)) + \sqrt(tan^2(x)) / \sqrt(1 - sin^2(x)))[/tex]
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What proportion of U.S. residents receive a jury summons each year? A polling organization plans to survey a random sample of 500 U.S. residents to find out. Let § be the proportion of residents in the sample who received a jury summons in the previous 12 months. According to the National Center for State Courts, 15% of U.S. residents receive a jury summons each
year. Suppose that this claim is true.
a) Calculate the mean and standard deviation of the sampling distribution.
b) Interpret the standard deviation
c) Justify that the sampling distribution is approximately normal.
Answer: a) Mean and standard deviation of the sampling distribution:
The mean of the sampling distribution, also known as the expected value or the population mean, is equal to the proportion of U.S. residents who receive a jury summons each year, which is 15%. So, the mean of the sampling distribution is:
µ = 0.15
The standard deviation of the sampling distribution, also known as the standard error, can be calculated using the formula:
σ = √(p(1 - p) / n)
where p is the population proportion of U.S. residents who receive a jury summons each year (0.15), and n is the sample size (500).
σ = √(0.15 * (1 - 0.15) / 500)
σ ≈ 0.03
So, the standard deviation of the sampling distribution is approximately equal to 0.03.
b) Interpretation of the standard deviation:
The standard deviation measures the spread of the sampling distribution, or how much the sample proportions deviate from the population proportion. A smaller standard deviation indicates that the sample proportions are more likely to be close to the population proportion, while a larger standard deviation indicates that the sample proportions are more likely to be further from the population proportion.
In this case, the standard deviation of 0.03 indicates that the sample proportions are expected to be within 0.03 of the population proportion (0.15) about 68% of the time.
c) Justification for the approximate normality of the sampling distribution:
According to the central limit theorem, the distribution of the sample proportions will be approximately normal as long as the sample size is large enough. In this case, with a sample size of 500, we can assume that the sampling distribution is approximately normal.
Step-by-step explanation:
solve 2x=32 in 2 different ways
Answer:
1. 32 divided by 2 is 16
2. 2 x 16 = 36
Step-by-step explanation:
What is the image of (1, 0) after a dilation by a scale factor of 4 centered at the
origin?
Answer:
(4, 0)
Step-by-step explanation:
You want the image point coordinates of (1, 0) dilated by a factor of 4 centered at the origin.
DilationWhen the dilation is centered at the origin, all coordinate values are multiplied by the scale factor.
(1, 0) ⇒ 4(1, 0) = (4, 0)
The image of the point is (4, 0).