Answer:
The equation for the parabola that passes through the points (−1,8), (2,−4), and (−6,−12) is [tex]y = -x^{2}-3\cdot x +6[/tex].
Step-by-step explanation:
Let be (−1,8), (2,−4), and (−6,−12) points contained in a parabola, which is represented by a second-order polynomial. To determine the constant of the second-order polynomial, the following system of equations must be solved:
[tex]a - b+c = 8[/tex]
[tex]4\cdot a +2\cdot b +c = -4[/tex]
[tex]36\cdot a -6\cdot b +c = -12[/tex]
There are several methods for solving this: Equalization, Elimination, Substitution, Determinant and Matrix. The solution of this system is: [tex]a = -1[/tex], [tex]b = -3[/tex] and [tex]c = 6[/tex]. Hence, the equation for the parabola that passes through the points (−1,8), (2,−4), and (−6,−12) is [tex]y = -x^{2}-3\cdot x +6[/tex].
In evaluating a double integral over a region D, a sum of iterated integrals was obtained as follows:
∬Df(x,y)dA=∫5_0∫(2/5)y_0 f(x,y)dxdy+∫7_5∫(7−y)_0 f(x,y)dxdy.
Sketch the region D and express the double integral as an iterated integral with reversed order of integration.
∫b_a∫g2(x)_g1(x) f(x,y)dydx
a= b=
g1(x)= g2(x)=
Answer
[tex]a=0[/tex], [tex]b=2[/tex]
[tex]g_1(x)=\frac{5x}{2}[/tex], [tex]g_2(x)=7-x[/tex]
Step-by-step explanation:
Given that
[tex]\int \int Df(x,y)dA=\int_0 ^5\int _0 ^ {\frac {2y}{5}} f(x,y)dxdy+\int_5^7\int_0^{7-y} f(x,y)dxdy\; \cdots (i)[/tex]
For the term [tex]\int_0 ^5\int _0 ^ {\frac {2y}{5}} f(x,y)dxdy[/tex].
Limits for [tex]x[/tex] is from [tex]x=0[/tex] to [tex]x=\frac {2y}{5}[/tex] and for [tex]y[/tex] is from [tex]y=0[/tex] to [tex]y=5[/tex] and the region [tex]D[/tex], for this double integration is the shaded region as shown in graph 1.
Now, reverse the order of integration, first integrate with respect to [tex]y[/tex] then with respect to [tex]x[/tex] . So, the limits of [tex]y[/tex] become from [tex]y=\frac{5x}{2}[/tex] to [tex]y=5[/tex] and limits of [tex]x[/tex] become from [tex]x=0[/tex] to [tex]x=2[/tex] as shown in graph 2.
So, on reversing the order of integration, this double integration can be written as
[tex]\int_0 ^5\int _0 ^ {\frac {2y}{5}} f(x,y)dxdy=\int_0 ^2\int _ {\frac {5x}{2}}^5 f(x,y)dydx\; \cdots (ii)[/tex]
Similarly, for the other term [tex]\int_5 ^7\int _0 ^ {7-y} f(x,y)dxdy[/tex].
Limits for [tex]x[/tex] is from [tex]x=0[/tex] to [tex]x=7-y[/tex] and limits for [tex]y[/tex] is from [tex]y=5[/tex] to [tex]y=7[/tex] and the region [tex]D[/tex], for this double integration is the shaded region as shown in graph 3.
Now, reverse the order of integration, first integrate with respect to [tex]y[/tex] then with respect to [tex]x[/tex] . So, the limits of [tex]y[/tex] become from [tex]y=5[/tex] to [tex]y=7-x[/tex] and limits of [tex]x[/tex] become from [tex]x=0[/tex] to [tex]x=2[/tex] as shown in graph 4.
So, on reversing the order of integration, this double integration can be written as
[tex]\int_5 ^7\int _0 ^ {7-y} f(x,y)dxdy=\int_0 ^2\int _5 ^ {7-x} f(x,y)dydx\;\cdots (iii)[/tex]
Hence, from equations [tex](i)[/tex], [tex](ii)[/tex] and [tex](iii)[/tex] , on reversing the order of integration, the required expression is
[tex]\int \int Df(x,y)dA=\int_0 ^2\int _ {\frac {5x}{2}}^5 f(x,y)dydx+\int_0 ^2\int _5 ^ {7-x} f(x,y)dydx[/tex]
[tex]\Rightarrow \int \int Df(x,y)dA=\int_0 ^2\left(\int _ {\frac {5x}{2}}^5 f(x,y)+\int _5 ^ {7-x} f(x,y)\right)dydx[/tex]
[tex]\Rightarrow \int \int Df(x,y)dA=\int_0 ^2\int _ {\frac {5x}{2}}^{7-x} f(x,y)dydx\; \cdots (iv)[/tex]
Now, compare the RHS of the equation [tex](iv)[/tex] with
[tex]\int_a^b\int_{g_1(x)}^{g_2(x)} f(x,y)dydx[/tex]
We have,
[tex]a=0, b=2, g_1(x)=\frac{5x}{2}[/tex] and [tex]g_2(x)=7-x[/tex].
The required values are,
[tex]a=0\\b=2\\g_1(x)=\frac{5x}{2} \\g_2(x)=7-x[/tex]
Double Integral:Double integral is mainly used to find the surface area of a 2d figure, and it is denoted using ‘ ∫∫’. We can easily find the area of a rectangular region by double integration.
Given function is,
[tex]\int \int_Df(x,y)dA=\int_{0}^{5}\int_{0}^{2y}f(x,y)dxdy+\int_{5}^{7}\int_{0}^{7-y}f(x,y)dxdy[/tex]
We can write the double integral as a single term by reversing the order as,
[tex]\int_{a}^{b}\int_{g_1(x)}^{g_2(x)}f(x,y)dydx=\int_{0}^{2}\int_{\frac{5x}{2}}^{7-x}f(x,y)dydx)[/tex]
The region D is attached below.
Hence, we get the values,
[tex]a=0\\b=2\\g_1(x)=\frac{5x}{2} \\g_2(x)=7-x[/tex]
Learn more about the topic Double Integral:
https://brainly.com/question/18568839
the sum of fifty and a
Answer:
a + 50
Step-by-step explanation:
Step 1: Translate word into math
sum = +
fifty = 50
a = a
Step 2: Combine
a + 50
Answer:
a + 50
Step-by-step explanation:
Step 1: Translate word into math
sum = +
fifty = 50
a = a
Step 2: Combine
a + 50
Which of the following numbers has the highest value? Select one
a. 0.97
b. 0.79
C 0.95
d. 0.89
Help, Find the domain of the function
Answer:
(-∞,∞)
Step-by-step explanation:
This would form a roughly parabolic shape that extends infinitely along the x-axis. It would reach a height of ³√2 on the y-axis. Because it extends infinitely left and right, it would have an infinite domain. In interval notation, this would be (-∞,∞)
Elsa's fish tank has 19 liters of water in it. She plans to add 4 liters per minute until the tank has more than 47 liters. What are the possible numbers of
minutes Elsa could add water?
Use t for the number of minutes.
Write your answer as an inequality
Leila's fish tank has 18 liters of water in it. She plans to add 5 liters per minute until the tank has more than 58 liters. What are the possible numbers of minutes Leila could add water? Use t for the number of minutes.
Write your answer as an inequality solved for t.
58<18+5t
40<5t
8
JUST LIKE THIS U CAN SOLVE...
ITS BETTER TO NOT GIVE STRAIGHT ANSWERS
1. The speed at which an automated assembly line produces a product follows a normal distribution with mean production time of 32.20 seconds and standard deviation of 1.05 seconds. A full production run from this line consists of 20 completed products. What is the probability that a full production run will take less than 32 seconds on average to produce?2. Recent homebuyers from a local developer allege that 30% of the houses this developer constructs have some major defect that will require substantial repairs. To test this allegation, we randomly sample 20 homes constructed by the developer and find that two of the homes did indeed have some major defect. If the allegation is correct, what is the probability of observing at most two defective homes out of a random sample of 20?3.It is believed that 15% of people who fly on commercial airliners are "very concerned" about the safety of the carrier they have chosen. If this is accurate, what is the probability that out of 150 randomly selected people who fly on commercial airliners, between 20 and 25 of them are "very concerned" about the safety of the carrier which they have chosen?
Answer: Probability = 0.2
Step-by-step explanation:
Given data:
Mean production time = 32.20 seconds
Standard deviation = 1,05seconds
probability that a full production run will take less than 32 seconds on average to produce
= P(Xbar<32)
= P(Z<-0.8518)
= 0.2
What is the answer? Step by step.
Answer:
420 in^2
Step-by-step explanation:
The area of the rectangle before removing the circles is
A = l*w
A = 24*22
=528
The area of one of the circles is
A = pi r^2
The diameter is 6 so the radius is 6/2 = 3
= 3.14 * ( 3) ^2
=28.26
There are 4 circles
4* 28.26
113.04
Subtract the area of the 4 circles from the rectangle
528-113.04
414.96
415 in ^2
The best estimate is 420
You want to go to graduate school, so you ask your math professor, Dr. Emmy Noether, for a letter of recommendation. You estimate that there is a 80% chance that you will get into a graduate program if you receive a strong recommendation, a 60% chance that you will get into a graduate program if you receive a moderately good recommendation, and 5% chance that you will get into a graduate program if you receive a weak recommendation. Furthermore, you estimate that the probabilities that a recommendation will be strong, moderately good, and weak are 0.7, 0.2, and 0.1, respectively. Based on these estimates, what is the probability that you will get into a graduate program. Given that you did receive an offer to attend a graduate program, what is the probability that you received a strong recommendation? Suppose you didn't receive an offer to attend a graduate program. Given that, what is the probability that you received a moderately good recommendation?
Answer:
a
[tex]P(G) = 0.69[/tex]
b
[tex]P(S | G) = 0.81[/tex]
c
[tex]P(M|G') = 0.26[/tex]
Step-by-step explanation:
From the question we are told the
The probability of getting into getting into graduated school if you receive a strong recommendation is [tex]P(G |S) = 0.80[/tex]
The probability of getting into getting into graduated school if you receive a moderately good recommendation is [tex]P(G| M) = 0.60[/tex]
The probability of getting into getting into graduated school if you receive a weak recommendation is [tex]P(G|W) = 0.05[/tex]
The probability of getting a strong recommendation is [tex]P(S) = 0.7[/tex]
The probability of receiving a moderately good recommendation is [tex]P(M) = 0.2[/tex]
The probability of receiving a weak recommendation is [tex]P(W) = 0.1[/tex]
Generally the probability that you will get into a graduate program is mathematically represented as
[tex]P(G) = P(S) * P(G|S) + P(M) * P(G|M) + P(W) * P(G|W)[/tex]
=> [tex]P(G) = 0.7 * 0.8 + 0.2 * 0.6 + 0.1 * 0.05[/tex]
=> [tex]P(G) = 0.69[/tex]
Generally given that you did receive an offer to attend a graduate program, what is the probability that you received a strong recommendation is mathematically represented as
[tex]P( S|G) = \frac{ P(S) * P(G|S)}{ P(G)}[/tex]
=> [tex]P(S|G) = \frac{ 0.7 * 0.8 }{0.69}[/tex]
=> [tex]P(S | G) = 0.81[/tex]
Generally given that you didn't receive an offer to attend a graduate program the probability that you received a moderately good recommendation is mathematically represented as
[tex]P(M|G') = \frac{ P(M) * (1- P(G|M))}{(1 - P(G))}[/tex]
[tex]P(M| G') = \frac{ 0.2 * (1- 0.6)}{ (1 - 0.69)}[/tex]
[tex]P(M|G') = 0.26[/tex]
it’s more than one answer by the way
Answer:
Step-by-step explanation:
(3 + 2i) + (4 – 5i) solve the equation .
Answer:
7 - 3 i
Step-by-step explanation:
Simplifying
(3 + -2i) + (4 + -5i) = 0
Remove parenthesis around (3 + -2i)
3 + -2i + (4 + -5i) = 0
Remove parenthesis around (4 + -5i)
3 + -2i + 4 + -5i = 0
Reorder the terms:
3 + 4 + -2i + -5i = 0
Combine like terms: 3 + 4 = 7
7 + -2i + -5i = 0
Combine like terms: -2i + -5i = -7i
7 + -7i = 0
Solving
7 + -7i = 0
Solving for variable 'i'.
Move all terms containing i to the left, all other terms to the right.
Add '-7' to each side of the equation.
7 + -7 + -7i = 0 + -7
Combine like terms: 7 + -7 = 0
0 + -7i = 0 + -7
-7i = 0 + -7
Combine like terms: 0 + -7 = -7
-7i = -7
Divide each side by '-7'.
i = 1
Simplifying
i = 1
Find an equation of the line graphed below: (picture included)
Answer:
Step-by-step explanation:
1/x + 1/y =9/11 (x+y)/x.y=9/11 11x+11y=9x.y
F(x)=11x/(9x-1)
Answer:
Step-by-step explanation:
(-5,-3) (1,0)
(0+3)/(1+5)= 3/6 = 1/2
y - 0 = 1/2(x - 1)
y = 1/2x - 1/2
What is the product of the polynomials below?
(6x2-3x-6)(4x2 +5x+4)
A. 24x4 +18x2 – 15x2 - 42x-2
B. 24x4 +18X? – 15x? - 36x - 24
C. 24x4 +18x3 - 15x2 - 42x - 24
D. 24x4 +18x? - 15x2 - 36x-2
Answer:
C :) try the box method! it always works for alot of people but i prefer diatrubuative method
Given that M< PQR=102, find M
I hope this helps you...
Please help I’m confused.
Answer:
What is the most common month? That is the answer
Step-by-step explanation:
Answer:
January is the most common month
Step-by-step explanation:
january=7
march=4
august=3
april=5
june=5
july=4
november=1
december=6
may=2
october=1
february=1
| 1) Simplify: 12+8/2x3-(42+3)
2) Simplify: 3
1 3
—+-
5
с
3) What is 23% of 80?
а
5/6
b
4) Using the image, name a
pair of corresponding angles.
I
5) Simplify: V169
Answer:
1 no. answer is -21
Step-by-step explanation:
According to BODMAS
12 + 8 / 2 * 3 - (42 + 3)
= 12 + 8 / 2 * 3 - 45
= 12 + 4 * 3 - 45
= 12 + 12 - 45
= 24 - 45
= -21
if D equals 4x + 10 e f equals 2x - 1 + d f equals 9 x - 15 find DF
Answer:
4x+10+2x-1=9x-15;
6x+9=9x-15;
6x-9x=-15-9;
-3x=-24;
3x=24;
from which
x=24:3=8
Then:
DF=9x-15=(9×8)-15=72-15=57
Was this helpful
5.71 x 0.8 = 3.26 x 1.45 True or false Need answers quick!!
Answer:
False
Step-by-step explanation:
All you want to do is times 5.71 by 0.8. Once you do that, you'll get 4.568. Then you times 3.26 by 1.45 which gets you 4.727, 4.568 does not = 4.727 which makes the statement false.
Data sets A and B are dependent. Find sd.Assume that the paired data came from a population that is normally distributed.A. 1.73B. 1.21C. 1.32D. 1.89
Complete question :
A : 2.7, 3.7, 5.6, 2.6, 2.7
B : 5.1, 4.0, 3.9, 3.8, 5.2
Data sets A and B are dependent. Find sd.Assume that the paired data came from a population that is normally distributed.A. 1.73B. 1.21C. 1.32D. 1.89
Answer: A.1.73
Step-by-step explanation:
Given the data:
A : 2.7, 3.7, 5.6, 2.6, 2.7
B : 5.1, 4.0, 3.9, 3.8, 5.2
Difference betweenA and B (A - B) :
Xd = (A - B) = - 2.4, -0.3, 1.7, - 1.2, - 2.5
Sum of (A - B) = Σ Xd = (-2.4 + (-0.3) + 1.7 + (-1.2) + (-2.5) = - 4. 7
Md = ΣXd / n = - 4.7 / 5 = - 0.94
Xd - Md = (-2.4 + 0.94), (-0.3 + 0.94), (1.7 + 0.94), (-1.2 + 0.94), (-2.5 + 0.94)
(Xd - Md) = - 1.46, 0.64, 2.64, - 0.26, - 1.56
(Xd - Md)^2 = (-1.46)^2 + 0.64^2 + 2.64^2 + (-0.26)^2 + (-1.56)^2
Σ(Xd - Md)^2 = (2.1316 + 0.4096 + 6.9696 + 0.0676 + 2.4336) = 12.012
Standard deviation = √[Σ(Xd - Md)^2 / (n-1)]
Standard deviation= √12.012 / 4
Standard deviation = 1.7329
Standard deviation= 1.73
Sebastian picked 21 white cabbages. He picked 12 red cabbages. How many cabbages did Sebastian pick
Answer:
Step-by-step explanation:
32 cabbages
21+12=32
HELP ME OUT! Triangle ABC is transformed by a rotation about the
origin, and then a translation.
The first transformation is a rotation of
degrees.
The second transformation is a translation that moves
units left and
units down.
Answer : 180 degrees
2 units left
5 units down
Your welcome ❤️
Answer:
The first transformation is a rotation of 180
degrees.
The second transformation is a translation that moves
2 units left and 5 units down.
Step-by-step explanation:
The tank of a small airplane holds 48 gallons of fuel. Seven gallons will be used for takeoff and landing. While in the air, the plane will consume an average of 10 gallons of fuel per hour. What is the maximum number of hours the plane can remain in the air?
A. 5.5
B. 4.8
C. 6.0
D. 4.1
Step-by-step explanation:
If x is the number of hours, then:
48 = 10x + 7
41 = 10x
x = 4.1
Find the output, d, when the input, t, is 11. d= -20+11t d= ______
Answer:
d = 101
Step-by-step explanation:
d= -20+11t
Let t=11
= -20 + 11(11)
= -20 + 121
101
Answer:
the output is 101
Step-by-step explanation:
d= -20+11t
in the question it is given that t=11
substituting t=11 in the given equation
d=-20+11(11)d=-20+121d=101so the output is 99
hope it will help ^_^
Write and expression equivalent to (7.5+2)-5
Answer:
4.5
Step-by-step explanation:
Order of Operations: BPEMDAS
Step 1: Write expression
(7.5 + 2) - 5
Step 2: Parenthesis
9.5 - 5
Step 3: Subtract
4.5
Answer:
4.5
Step-by-step explanation:
Order of operations rules dictate that we do the operation within the parentheses first: 7.5 + 2 = 9.5.
Then we have 9.5 - 5, or 4.5.
The GCF is 3x...
Express each term as the product of the GCF and its other factors.
15x^2+6x=3x(__)+3x(__)
Consider the first order differential equation
y′ + t/t2 − 25y = et/t − 9
For each of the initial conditions below, determine the largest interval a
a. y(-7) = 6.4.
b. y(-2. 5) = -0.5.
c. y(0) = 0.
d. y(4.5) = -2.1.
e. y(14)= 1.7.
Answer:
For y(-7) =6.4
The largest interval is between
[tex]-\infty \to -5[/tex]
For y(-2.5) = -0.5.
The largest interval is between
[tex]-5 \to 5[/tex]
For y(0) = 0
The largest interval is between
[tex]-5 \to 5[/tex]
For y(4.5) = -2.1.
The largest interval is between
[tex]-5 \to 5[/tex]
For y(14)= 1.7.
The largest interval is between
[tex]9 \to \infty[/tex]
Step-by-step explanation:
From m the question we are told that
The first order differential equation is [tex]\frac{y' - t}{ t^2 -25} = \frac{e^t}{t-9}[/tex]
Now the first step is to obtain the domain of the differential equation
Now to do that let consider the denominators
Now generally
[tex]t^2 - 25 \ne 0[/tex] side calculation
=> [tex]t\ne \pm5[/tex] [tex]t^2 - 25 = 0[/tex]
[tex]t = \pm 5[/tex]
Also [tex]t-9\ne 0[/tex] [tex]t -9 = 0[/tex]
=> [tex]t\ne 9[/tex] [tex]t= 9[/tex]
This means that this first order differential equation is discontinuous at
[tex]t = -5 , \ \ t = 5 \ \ t = 9[/tex]
[tex]This \ is \ illustrated \ below \ \\ ------------------\\\. \ \ \ | \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ | \ \ \ \ \ \ \ \ \ \ \ \ \ |\\. \ -5 \ \ \ \ \ \ \ \ \ \ \ \ 5 \ \ \ \ \ \ \ \ \ \ \ \ \ 9[/tex]
So
For y(-7) =6.4
The largest interval is between
[tex]-\infty \to -5[/tex]
For y(-2.5) = -0.5.
The largest interval is between
[tex]-5 \to 5[/tex]
For y(0) = 0
The largest interval is between
[tex]-5 \to 5[/tex]
For y(4.5) = -2.1.
The largest interval is between
[tex]-5 \to 5[/tex]
For y(14)= 1.7.
The largest interval is between
[tex]9 \to \infty[/tex]
Vivian is getting a pet snake. She is choosing between the ball python and the corn snake. the ball python is 4 1/2 ft long and the corn snake is 45 in. long. Vivian wants the shorter snake. Which snake should she get? Show your work. (12 in. = 1 ft)
Answer:
The 45 in snake is the shorter one.
Step-by-step explanation:
Which is shorter, 45 in or 4 1/2 ft?
12 in
Convert 4 1/2 ft into inches by multiplying 4 1/2 ft by --------- = 54 in.
1 ft
Thus, the 45 in snake is shorter than the 54 in one and should b e V's first choice.
The shorter snake will be a corn snake. Then she will get a corn snake.
What is conversion?Conversion means to convert the same thing into different units.
Vivian is getting a pet snake. She is choosing between the ball python and the corn snake. The ball python is 4 1/2 feet long and the corn snake is 45 inches long.
Convert inches into feet. Then the length of a corn snake will be
45 inches = 45/12 feet
45 inches = 3 3/4 feet
Vivian wants the shorter snake.
Thus, the shorter snake will be a corn snake. Then she will get a corn snake.
More about the conversion link is given below.
https://brainly.com/question/9414705
#SPJ2
8+(-8) + a = simplified
Answer:
Just a
Step-by-step explanation:
8+(-8) they cancel each other out so 0+a = a
Brainliest to best PLEASE!!
Step-by-step explanation:
This is the answer i guess thank me if its right
An electronics store received two shipments of radios. Of the 250 radios in the first shipment, exactly 6% were damaged. In the second shipment, 4% of the radios were damaged. A total of 24 radios were damaged. How many radios in the combined shipments were NOT damaged? A. 466 B. 441 C. 451 D. 460
Answer:
Total number of not damaged = 451
C. 451
Step-by-step explanation:
In the first shipment, 6% of the 250 radios where damaged.
Number of damaged= 6/100 * 250
Number of damaged= 6*2.5
Number of damaged= 15 radios.
Number of not damaged= 250-15
Number of not damaged = 235 radios
In the second shipment, 4% of the radios were damaged
Let the number of second shipment= y
0.04 of y where damaged
Total number of radio damaged= 24
15 + 0.04y = 24
0.04y= 24-15
0.04y = 9
Y= 9/0.04
Y= 225
Number of radio in the second shipment= 225
Number of damaged in the second shipment= 0.04*225
Number of damaged in the second shipment= 9
Number of not damaged in the second shipment= 225-9
Number of damaged in the second shipment= 216
Total number of not damaged
= 235+216
= 451
Total number of not damaged= 451
what is the common like term for 11 a^2v-12ab^2
Answer:
a
Step-by-step explanation:
There are no like terms here, hence no "common like term."
__
The terms have a greatest common factor of 'a', so the expression could be written as ...
a(11av -12b^2)
The greatest common factor is 'a'.