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Lyrx [107]
3 years ago
15

I need help with this please

Mathematics
2 answers:
nata0808 [166]3 years ago
6 0

the correct answer is A) 10x + 30

cupoosta [38]3 years ago
5 0

Answer:

The answer is "10x+30"

Step-by-step explanation:

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Evaluate the spherical coordinate integral
expeople1 [14]

Rewrite the equations of the given boundary lines:

<em>y</em> = -<em>x</em> + 1  ==>  <em>x</em> + <em>y</em> = 1

<em>y</em> = -<em>x</em> + 4  ==>  <em>x</em> + <em>y</em> = 4

<em>y</em> = 2<em>x</em> + 2  ==>  -2<em>x</em> + <em>y</em> = 2

<em>y</em> = 2<em>x</em> + 5  ==>  -2<em>x</em> + <em>y</em> = 5

This tells us the parallelogram in the <em>x</em>-<em>y</em> plane corresponds to the rectangle in the <em>u</em>-<em>v</em> plane with 1 ≤ <em>u</em> ≤ 4 and 2 ≤ <em>v</em> ≤ 5.

Compute the Jacobian determinant for this change of coordinates:

J=\begin{bmatrix}\frac{\partial u}{\partial x}&\frac{\partial u}{\partial y}\\\frac{\partial v}{\partial x}&\frac{\partial v}{\partial y}\end{bmatrix}=\begin{bmatrix}1&1\\-2&1\end{bmatrix}\implies|\det J|=3

Rewrite the integrand:

-3x+4y=-3\cdot\dfrac{u-v}3+4\cdot\dfrac{2u+v}3=\dfrac{5u+7v}3

The integral is then

\displaystyle\iint_R(-3x+4y)\,\mathrm dx\,\mathrm dy=3\iint_{R'}\frac{5u+7v}3\,\mathrm du\,\mathrm dv=\int_2^5\int_1^45u+7v\,\mathrm du\,\mathrm dv=\boxed{333}

5 0
4 years ago
two technicians regularly make repairs when breakdowns occur on an automated production line. the first technican, who services
xxMikexx [17]

Answer:

52.63% probability that thids intial repair was made by the first technican

Step-by-step explanation:

Bayes Theorem:

Two events, A and B.

P(B|A) = \frac{P(B)*P(A|B)}{P(A)}

In which P(B|A) is the probability of B happening when A has happened and P(A|B) is the probability of A happening when B has happened.

In this question:

Event A: Incomplete repair

Event B: Made by the first technican.

The first technican, who services 40% of the breakdowns, has 5% chance of making incomplete repair.

This means that P(B) = 0.4, P(A|B) = 0.05.

Probability of an incomplete repair:

5% of 40%(first technican) or 3% of 60%(second technican). So

P(A) = 0.05*0.4 + 0.03*0.6 = 0.038

Given that there is a problem with the production line due to an incomplete repair, what is the probability that thids intial repair was made by the first technican

P(B|A) = \frac{0.4*0.05}{0.038} = 0.5263

52.63% probability that thids intial repair was made by the first technican

8 0
4 years ago
An officer printer prints 25 photos in 12.5 minutes. A home printer prints 15 photos in 6 minutes. Which printer is faster, How
ollegr [7]

Answer:

The home printer is faster.

Step-by-step explanation:

25 photos in 12.5 minutes

12.5 is half of 25 and therefore this is a two to one ratio.

So 2 photos print in 1 minute with the office printer.

And 4 photos in 2 minutes(this is relevant later)

The home printer prints 15 photos in 6 minutes. Since 15 is not divisible by 6 without a remainder divide both by 3.

So 5 photos in 2 minutes. This is faster than the office printer.

To find how many photos it would print in 12 more minutes, simply multiply 15 by two, since the minutes(6) was multiplied by 2 to get 12. This leaves you with an answer of 30 photos in 12 minutes

7 0
3 years ago
Read 2 more answers
Complete the equation of the line whose slope is -2 and y-intercept is (0,3).
jarptica [38.1K]

It would be y= -2x+3 :)

5 0
3 years ago
Read 2 more answers
The cost of a hamburger is $4.50. Each additional hamburger costs $2.00. Sully wrote this explicit rule to explain the sequence
valentina_108 [34]

60.50 is not the correct answer. The correct answer is $30.50. To get the correct answer multiply 2X13, which is 26. Then add 4.50 cents to the 26, which gets you 30.50.

6 0
3 years ago
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