Answer:
(x-1)
Step-by-step explanation:
-3x^2-21x+24
Factor out -3
-3 (x^2 +7x -8)
Factor inside the parentheses
What two terms multiply to -8 and add to 8
8*-1 = -8
8+-1 = 7
-3(x+8)(x-1)
Answer:
x-1
Step-by-step explanation:
A P E X
A company that maintains swimming pools eams $60 for each pool the workers clean and treat with chemicals.
. The revenue, in dollars, the company earns to clean and treat z pools can be described using the function r(z) = 60z.
• The cost, in dollars, the company pays for chemicals and for the workers to clean and treat z pools can be described using the function c (z) = 3z² + 42r.
. The profit the company earns, in dollars, can be described using the function p (z)=r(z) - c(z).
Determine a simplified expression to describe p (z), the profit the company earns, in dollars. Use the on-screen keyboard to type the answer in the box.
WHAT IS P(x) =
The simplified expression for p(z), the profit the company earns, in dollars is: p(z) = -3z² + 18z
What is function?The set X is known as the domain of the function, and the set Y is known as the codomain of the function. A function from a set X to a set Y assigns each element of X to exactly one element of Y. Originally, functions were an idealization of how one variable depends on another.
According to question:First, let's substitute the expressions for r(z) and c(z) in the expression for p(z):
p(z) = r(z) - c(z)
p(z) = 60z - (3z² + 42z)
p(z) = 60z - 3z² - 42z
p(z) = -3z² + 18z
Therefore, the simplified expression for p(z), the profit the company earns, in dollars is:
p(z) = -3z² + 18z
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find the 55th term of the arithmetic sequence 11,21,31,...
PLS HELP WILL MARK BRAINLIEST FOR FASTEST CORRECT ANSWER!!!!
The solution to a system of equations is (5,-19). Choose two equations that might make up the system.
y=-3x-6
y=2x-23
y=-7x+16
y=x-17
y=-2x-9
Answer:
y = -7x + 16 and y = -2x - 9
Step-by-step explanation:
Of the five equations the only ones that exist at the point, (5, -19) are y = - 7x + 16 and y = -2x - 9 (Test them out yourself!).
Hope this helps :)
Problem 18 Last summer, Lisa and her family went on vacation. They drove from their home to Florida. They drove four days, about 540 miles each day. About how many miles did they drive altogether?
Answer:
2160
Step-by-step explanation:
Distance covered per day =540miles
Number of days travelled = 4 days
Therefore,the mil we s travelled altogether= 540×4= 2160
hi! please help in math!
i need the solution/explanation on how you got the answer
(y + 3) = -8(x - 4)
what is the slope?
Answer:
slope m = - 8
Step-by-step explanation:
the equation of a line in point- slope form is
y - b = m(x - a)
where m is the slope and (a, b ) a point on the line
y + 3 = - 8(x - 4) ← is in point- slope form
with slope m = - 8
The slope is :
↬ -8Solution:
Given: \(\bf{y+3=-8(x-4)}\)
To determine the slope, it's important to know the form of the equation first.
There are 3 forms that you should be familiar with.
The three forms of equations of a straight line are:
Slope Intercept (y = mx + b)Point slope (y-y₁) = m(x - x₁)Standard form (ax + by = c)This equation matches point slope perfectly.
The question becomes, how do you work with point slope to find slope?
Point slopeIn point slope, m is the slope and (x₁, y₁) is a point on the line.
Similarly, the slope of \(\bf{y+3=-8(x-4)}\) is -8.
Hence, the slope is -8.Plz help!!!!!!!!!!!!!!!!!
Answer:
I believe it is a maximum. So sorry if im wrong
Step-by-step explanation:
What is the slope between point A (-9, 4) and B ( 3, -2)
I NEED HELP ASAP
a)1/2
b)-1/2
c)2
d)-2
e)3/2
Slope can be calculated using the formula: m= \(\frac{y2 - y1}{x2 - x1}\)
y1/x1 represents the first number in the bracket
y2/x2 represents the second number in the bracket
Calculation
m = \(\frac{y2 - y1}{x2 - x1}\)
m =\(\frac{4 - (-2)}{(-9)-3}\)
m= 6/-12
m= -0.5 or -1/2
Therefore, the answer is B.
at a race track, the average speed of the race cars is measured every lap. the box-and-whisker plot represents the average speed of a certain car for several laps. what is the range in the average speed?
The median of the given data is 131, which is the average of the two middle values of the box plot range.
The given box-and-whisker plot represents the average speed of a certain car for several laps. The median value is the middle value of the data when it is arranged in ascending or descending order. In this case, the median is the value that divides the box into two equal halves.
Since the box plot range is from 126 to 131 and 131 to 135, the median value would be the average of the two middle values, which are 131 and 131. Therefore, the median of the given data is (131+131)/2 = 131.
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the random variable X has moment generating function ϕX(t)=(0.21et+1−0.21)7 Provide answers to the following to two decimal places (a) Evaluate the natural logarithm of the moment generating function of 3X at the point t=0.75. (b) Hence (or otherwise) find the expectation of 3X. (c) Evaluate the natural logarithm of the moment generating function of 3X+8 at the point t=0.75.
(a) The natural logarithm of the moment generating function (MGF) of 3X at t=0.75 is ln(ϕ_3X(0.75)).
(b) The expectation of 3X is E(3X) = 3E(X).
(c) The natural logarithm of the MGF of 3X+8 at t=0.75 is ln(ϕ_(3X+8)(0.75)).
(a) First, find the MGF of 3X: ϕ_3X(t) = ϕ_X(3t) = (0.21\(e^3^t\) + 1 - 0.21)⁷. Next, evaluate at t=0.75: ϕ_3X(0.75) = (\(0.21e^2^.^2^5\) + 1 - 0.21)⁷. Finally, find the natural logarithm: ln(ϕ_3X(0.75)).
(b) To find the expectation of 3X, first find the expectation of X: E(X) = ϕ'_X(0). Differentiate the MGF of X w.r.t t: ϕ'_X(t) = 7(0.21\(e^t\))(0.21\(e^t\) + 1 - 0.21)⁶. Evaluate at t=0: E(X) = 7(0.21)(1)⁶ = 1.47. Then, E(3X) = 3E(X) = 3 * 1.47 = 4.41.
(c) The MGF of 3X+8 is ϕ_(3X+8)(t) = \(e^8^t\)ϕ_3X(t). Evaluate at t=0.75: ϕ_(3X+8)(0.75) = e⁶ * (\(0.21e^2^.^2^5\) + 1 - 0.21)⁷. Find the natural logarithm: ln(ϕ_(3X+8)(0.75)).
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4. Evaluate the following expression for r= 5.
2(r2 - 8)
Answer:
The expression is equal to 4
Step-by-step explanation:
Given the expression 2(r2-8) and the equality for the variable r = 5. It is best to substitute this equality into the expression to solve for its corresponding value:
2(r2-8) =
2(2(r)-8),
2(2(5)-8),
2(10-8),
2(2),
4
Solve -6x +18> -30.
A. x < 2
B. x > 2
C. x > 8
D. x < 8
Answer: D, x < 8
Step-by-step explanation: Subtract 18 from both sides.
Simplify the expression
Subtract the numbers
Subtract the numbers
Divide both sides by the same factor, and flip the relation because the factor is negative
Cancel terms that are in both the numerator and denominator
Divide the numbers
−6x+18−18>−30−18=
=x<8
pleaseee help it's due tonight and i don't know what it wants and how to do it
Answer:
solve
Step-by-step explanation:
plus . minus and divide
Answer:
1- Let x = original price then
x - .20x = 48
x(1 - .20) = 48
x(.80) = 48
x = 48/.80
x = $60
2-Let "x" be the number of lessons.
240 - 15x = 0
240 = 15x
x = 16 lessons
3-divide equation by 2:
(2W-4) + W = 32
2W - 4 + W = 32
2W + W = 32 + 4
3W = 36
W = 36/3
W = 12 cm
Find the Length using L = 2W-4:
L = 2(12) - 4
L = 20 cm
Check: 2(20) + 2(12) = 64
4-P stands for the original price. The 90 stands for 90 %. Wendy paid 100-10, or 90 %.
Step-by-step explanation:
HELP PLEASEEEE
Part of a cheerleading routine is throwing a flyer straight up and catching her on the way down. The flyer begins this move with her center of gravity 4 feet above the ground. She is thrown with an initial vertical velocity of 30 feet per second.
1. Will the flyer’s center of gravity ever reach 20 feet? In two or more complete . sentences, explain how you found your answer.
2.For the flyer to have her center of gravity reach 25 feet, what does the initial velocity need to be? In two or more complete sentences, explain how you found your answer.
Given that a flyer begins from earth and thrown up with a velocity of 30 ft/sec vertically.
u = initial velocity = 30 : a = -g = 32 ft/sec^2
s(0) =initial height =4 ft.
We have the equation
where u = initial velocity : v= final velocity : s = distance travelled and a = acceleration. Here final velocity is found out as follows
Substitute to get
Since v cannot be negative, the flyer’s center of gravity cannot ever reach 20 feet.
----------------------------------
To reach 25 ft, put s = 25
and v must be atleast 0
Then we have
Hence if thrown with initial velocity of 40 ft /sec, it will reach a height of 25 ft.
12.5b: fiond the laplace transform for f2(t) = 27t^2sin(6t-60)u(t)
The Laplace transform of f2(t) is, L{f2(t)} = 216/(s^3(s^2+36)) - 6s/(s^2+36)^2
To find the Laplace transform of f2(t), we use the definition of the Laplace transform:
L{f(t)} = \(\int_0^{\infty} e^{-st} f(t) dt\)
where L{f(t)} denotes the Laplace transform of f(t), s is a complex number, and u(t) is the unit step function.
Substituting f2(t) into this formula, we get:
L{f2(t)} = \(\int_0^{\infty} e^{-st} (27t^2sin(6t-60)u(t)) dt\)
Using the properties of the Laplace transform, we can simplify this expression. First, we can factor out the constant 27:
L{f2(t)} = \(27 \int_0^{\infty} e^{-st} (t^2sin(6t-60)u(t)) dt\)
Next, we use the identity sin(a-b) = sin(a)cos(b) - cos(a)sin(b) to write the sin function as a sum of exponential functions:
L{f2(t)} = \(27 \int_0^{\infty} e^{-st} (t^2(sin(6t)cos(60) - cos(6t)sin(60))u(t)) dt\)
L{f2(t)} = \(27 \int_0^{\infty} e^{-st} (t^2sin(6t)u(t)cos(60) - t^2cos(6t)u(t)sin(60)) dt\)
We can now apply the Laplace transform to each term separately. Using the formula L{t^n} = n!/s^(n+1), we get:
L{t^2sin(6t)u(t)cos(60)} = (2!/(s^3)) L{sin(6t)u(t)} = 12/(s^3(s^2+36))
L{t^2cos(6t)u(t)sin(60)} = (2!/(s^3)) L{cos(6t)u(t)} = (2s)/(s^2+36)^2
Substituting these expressions back into the original equation, we get:
L{f2(t)} = 27 (12/(s^3(s^2+36))cos(60) - (2s)/(s^2+36)^2sin(60))
Simplifying this expression, we get:
L{f2(t)} = 216/(s^3(s^2+36)) - 6s/(s^2+36)^2
Therefore, the Laplace transform of f2(t) is:
L{f2(t)} = 216/(s^3(s^2+36)) - 6s/(s^2+36)^2
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28. Last week, Lee earned some money babysitting. He
spent of his earnings on dinner. He spent another
of his earnings on a movie. He saved the remaining
$19.80. How much did he earn from babysitting last
week?
F. $20.25
G. $29.70
H. $30.69
J. $36.00
K. $44.00
Answer:
the answer should be 44 dollar correct me if im wrong
Step-by-step explanation:
Please help pleaseee
Measure of angle M is 76°, angle N is 76° and side LN is 18 in.
According to figure,
LM = 18 in
∠NLM = 28°
In triangle LMN
LN = LM
= 18 in
Therefore, ∠LMN = ∠LNM = x (LN = LM)
∠LMN + ∠NLM + ∠LNM = 180°
x + 28 + x = 180
2x + 28 = 180
2x = 180 - 28
2x = 152
x = 152/2
x = 76
Hence, ∠M = ∠N = 76°.
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P(Ω)
P(A)
0.4
0.1
P(B)
0.2
0.3
Answer:
i dont even have the first one on my computer
Step-by-step explanation:
Consider a linear transformation T from R2 to R2 for which T([1 0])=[−4 1] and T([0 1])=[2−5]. Find the matrix A of T.
The matrix A of T is given by A = [−4 2;1 -5].
Let T be a linear transformation from R² to R², such that T([1 0]) = [-4 1] and T([0 1]) = [2 -5].
We are to find the matrix A of T.
Linear transformations are functions that satisfy two properties.
These properties are additivity and homogeneity.
Additivity means that the sum of T(x + y) is equal to T(x) + T(y), while homogeneity means that T(cx) = cT(x).
Let A be the matrix of T.
Then, [T(x)] = A[x], where [T(x)] and [x] are column vectors.
This means that A[x] = T(x) for any vector x in R².
We can compute the first column of A by applying T to the standard basis vector [1 0] in R².
That is, [T([1 0])] = A[1 0].
Substituting T([1 0]) = [-4 1], we have -4 = a11 and 1 = a21.
We can compute the second column of A by applying T to the standard basis vector [0 1] in R².
That is, [T([0 1])] = A[0 1].
Substituting T([0 1]) = [2 -5], we have 2 = a12 and -5 = a22.
Therefore, the matrix A of T is given by A = [−4 2;1 -5].
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You polled 2805 Americans and asked them if they drink tea daily. 724 said yes. With a 95% confidence level, construct a confidence interval of the proportion of Americans who drink tea daily. Specify the margin of error and the confidence interval in your answer.
According to the information, the 95% confidence interval for the proportion of Americans who drink tea daily is approximately (0.2485, 0.2766). The margin of error is approximately 0.0140.
How to construct a confidence interval?To construct a confidence interval for the proportion of Americans who drink tea daily, we can use the formula:
Confidence Interval = p ± Z * \(\sqrt\)((p * (1 - p)) / n)Where,
p = the sample proportion
Z = the critical value corresponding to the desired confidence level
n = the sample size
Given:
Sample size (n) = 2805Number of Americans who drink tea daily (p) = 724/2805 ≈ 0.2580 (rounded to four decimal places)Z-value for a 95% confidence level ≈ 1.96Now, let's calculate the confidence interval and margin of error:
Confidence Interval = 0.2580 ± 1.96 * \(\sqrt\)((0.2580 * (1 - 0.2580)) / 2805)Confidence Interval ≈ (0.2485, 0.2766)Margin of Error = 1.96 * \(\sqrt\)((0.2580 * (1 - 0.2580)) / 2805)Margin of Error ≈ 0.0140According to the information, the 95% confidence interval for the proportion of Americans who drink tea daily is approximately (0.2485, 0.2766), with a margin of error of approximately 0.0140.
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What is the length of the side marked x to the nearest tenth? (giving brainliest and thanks to all!)
Answer:
Step-by-step explanation:
pythagors theorem
a^2+b^2=c^2
15^2+x^2=21^2
225+x^2=441
x^2=441-225
x=\(\sqrt{216\)
x=6\(\sqrt{6\)
=14.69
x=14.7 km
Please help I will give you BRAINLIEST
============================================================
Explanation:
Starting at (4, -1) and moving four units up will have us arrive at (4, 3). We add 4 to the y coordinate and keep the x coordinate the same. The algebraic rule is stated as \((x,y) \to (x,y+4)\).
Next, we reflect over the y axis. This will have us flip the sign of the x coordinate while keeping the y coordinate the same. The algebraic rule for this kind of reflection is \((x,y) \to (-x,y)\). The point (4,3) reflects over the y axis to get to (-4,3)
So we started at (4, -1), then moved four units up to get to (4,3) and then reflected over the y axis to get to (-4, 3) which is the final stop.
This is all shown in the diagram below.
how would you determine the exact concentration of the solution made?
To determine the exact concentration of the solution made, one can divide the mass of the solute with the volume of the solution.
A solution is the substance formed by the mixture of solute in solvent. The solute may or may not be dissolved in the solution. One can determine the exact concentration of the solution if the mass of solute added in the specific volume of solution is known. If the solution is made by someone else, then its concentration can be determined by process of titration.
The concentration of a solution is expressed in the form of moles or grams per unit liter. If the solution is unknown and only its dissolved chemical is known, then titration will help in determining the closest value of concentration if performed without human error. In titration, the use of glassware that that is more precise than the flasks, beakers, and graduated cylinders are used.
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Refer to complete question below:
How do we determine concentration a solution? If it is a solution that we have made up, we can readily do the calculations required. But what if it is a solution that someone else has made? What technique can be used to gather information about a solution that we are given with no other information than the name of the chemical dissolved.
Someone who knows how to do this correctly, please write an expression for its perimeter. Thanks and will mark BRAINLIEST whoever answers correctly.
Step-by-step explanation:
perimeter = 2y + 2y + 3 + 3x + 2y + 3 + 2y + 4x + 5
= 8y + 7x + 11
Step-by-step explanation:
2y+3+2y+4x+5+3x
=2y+2y+3x+4x+3+5
=4y+7x+8
The UCL and LCL for an x-bar chart are 25 and 15 respectively. The central line is 20, and the process variability is considered to be in statistical control. The results of the next six sample means are 18, 23, 17, 21, 24, and 16. What should you do? A. Explore the assignable causes because there is a run. B. Nothing; the process is in control. C. Explore the assignable causes because there is a trend. D. Explore the assignable causes because there is an oscillation. E. Explore the assignable causes because the second, fourth, and fifth samples are above the mean.
Option E should be chosen, which is to explore the assignable causes because the second, fourth, and fifth samples are above the mean.
In an x-bar chart, the control limits (UCL and LCL) are based on the process variability and are used to determine if the process is in control. The central line represents the mean of the process.
Looking at the given sample means of 18, 23, 17, 21, 24, and 16, we can see that the second, fourth, and fifth samples are above the mean of 20. This suggests a potential shift or deviation from the expected process mean.
In an x-bar chart, if any sample mean falls outside the control limits or exhibits a non-random pattern, it indicates the presence of assignable causes, which are factors that can be identified and addressed to improve the process. Since the second, fourth, and fifth samples are above the mean, it is advisable to explore the assignable causes, as stated in option E.
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What is the number of degrees the minute hand of a clock moves between 10:21 and 10:34 pm on the same day?
.
Step-by-step explanation:
The correct answer is 78
After 2 years of continuous compounding at 11.8% the amount in an account is $11,800. What was the amount of the initial deposit? A) $14,940.85 B) $8139.41 C) $13,760.85 D) $9319.41
To find the initial deposit, we can use the formula for compound interest:
A = P *\(e^{(rt)\)
Where:
A = Final amount after t years
P = Initial deposit
r = Annual interest rate (in decimal form)
t = Number of years
e = Euler's number (approximately 2.71828)
In this case, we are given:
A = $11,800
r = 11.8% = 0.118 (in decimal form)
t = 2 years
We need to solve for P, the initial deposit.
Dividing both sides of the equation by \(e^{(rt)}\):
A / \(e^{(rt)}\) = P
Substituting the given values:
P = $11,800 / \(e^{(0.118 * 2)\)
Using a calculator:
P ≈ $11,800 / \(e^{(0.236)}\)
P ≈ $11,800 / 0.7902
P ≈ $14,940.85
Therefore, the amount of the initial deposit was approximately $14,940.85. Option A) $14,940.85 is the correct answer.
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Match the correct statement with the given information.
Column A
1.
A cone's radius increases x 3:
A cone's radius increases x 3
2.
A cone's height increases x 3:
A cone's height increases x 3
3.
A sphere's radius increases x 3:
A sphere's radius increases x 3
4.
A cylinder's radius increases x 6:
A cylinder's radius increases x 6
Column B
a.The cone's volume will increase x 9
b.The cone's volume will increase x 3
c.The cylinder's volume will increase x 6
d.The sphere's volume will increase x 6
e.The cylinder's volume will increase x 12
f.The cone's volume will increase x 6
g.The sphere's volume will increase x 3
h.The cylinder's volume will increase x 18
i.The cylinders volume will increase x 36
j.The sphere's volume will increase x 9
k.The sphere's volume will increase x 27
The correct statements regarding the transformations to the volumes are given as follows:
1. A cone's radius increases x 3: -> The cone's volume will increase x 9.
2. A cone's height increases x 3: -> The cone's volume will increase x 3
3. A sphere's radius increases x 3 -> The sphere's volume will increase x 27.
4. A cylinder's radius increases x 6 -> The cylinders volume will increase x 36.
What are the volumes?The equations that give the volumes of each solid are given as follows:
Cone: V = πr²h/3.Sphere: V = 4πr³/3.Cylinder: V = πr²h.Then the increases are given as follows:
Radius: Volume is multiplied by the scale factor squared in the case of cone/cylinder, and scale factor cubed in the case of the sphere.Height: Volume is multiplied by the scale factor.More can be learned about the volume of an sphere at https://brainly.com/question/10171109
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Find the values of a and b such that x^2-2x+2=(x-a)^2+b
Answer:
a = 1, b = 1
Step-by-step explanation:
Expand the right side and compare the coefficients of like terms on both sides, that is
right side
(x - a)² + b ← expand factor using FOIL
= x² - 2ax + a² + b
Compare to left side x² - 2x + 2
Compare the coefficients of the x- term
- 2a = - 2 ( divide both sides by - 2 )
a = 1
Compare the constant terms
a² + b = 2 ( substitute a = 1 )
1² + b = 2
1 + b = 2 ( subtract 1 from both sides )
b = 1
Thus a = 1, b = 1
NEED HELP IMMEDIATELY!
Simplify 10√2y + 5√2y + 3√2y.
A. 18√6y
B. 18√2y
C. 12√2y
D. 18√6y^3
(ANSWER IS NOT A)
18 root
2
Step-by-step explanation:
In this question imagine there is no y
It will be 10 root2 +5 root2 +3 root 2 it will be 18 root 2
Find each measure.
m∠ JLK
The measure of the major arc JLK will be 206°. Then the correct option is B.
What is an angle?The angle is the distance between the intersecting lines or surfaces. The angle is also expressed in degrees. The angle is 360 degrees for one complete spin.
The measure of the minor arc JK will be 154°.
Then the sum of the major arc and minor arc in a circle is 360°.
Then the major arc JLK will be given as,
JLK + JK = 360°
JLK + 154° = 360°
JLK = 206°
The measure of the major arc JLK will be 206°. Then the correct option is B.
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