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Hatshy [7]
3 years ago
13

Which figure shows a reflection of pre-image QRS over the line t? (Picture has answers.)

Mathematics
2 answers:
Vika [28.1K]3 years ago
7 0

A, because its reflecting off of the y axis

Ugo [173]3 years ago
6 0
A it reflecting off the y axis
You might be interested in
Let Y1 and Y2 be independent exponentially distributed random variables, each with mean 7. Find P(Y1 > Y2 | Y1 < 2Y2). (En
ArbitrLikvidat [17]

<em>Y</em>₁ and <em>Y</em>₂ are independent, so their joint density is

f_{Y_1,Y_2}(y_1,y_2)=f_{Y_1}(y_1)f_{Y_2}(y_2)=\begin{cases}\frac1{49}e^{-\frac{y_1+y_2}7}&\text{for }y_1\ge0,y_2\ge0\\0&\text{otherwise}\end{cases}

By definition of conditional probability,

P(<em>Y</em>₁ > <em>Y</em>₂ | <em>Y</em>₁ < 2 <em>Y</em>₂) = P((<em>Y</em>₁ > <em>Y</em>₂) and (<em>Y</em>₁ < 2 <em>Y</em>₂)) / P(<em>Y</em>₁ < 2 <em>Y</em>₂)

Use the joint density to compute the component probabilities:

• numerator:

P((Y_1>Y_2)\text{ and }(Y_1

=\displaystyle\frac1{49}\int_0^\infty\int_{\frac{y_1}2}^{y_1}e^{-\frac{y_1+y_2}7}\,\mathrm dy_2\,\mathrm dy_1

=\displaystyle-\frac17\int_0^\infty\int_{-\frac{3y_1}{14}}^{-\frac{2y_1}7}e^u\,\mathrm du\,\mathrm dy_1

=\displaystyle-\frac17\int_0^\infty\left(e^{-\frac{2y_1}7} - e^{-\frac{3y_1}{14}}\right)\,\mathrm dy_1

=\displaystyle-\frac17\left(-\frac72e^{-\frac{2y_1}7} + \frac{14}3 e^{-\frac{3y_1}{14}}\right)\bigg|_0^\infty

=\displaystyle-\frac17\left(\frac72 - \frac{14}3\right)=\frac16

• denominator:

P(Y_1

(I leave the details of the second integral to you)

Then you should end up with

P(<em>Y</em>₁ > <em>Y</em>₂ | <em>Y</em>₁ < 2 <em>Y</em>₂) = (1/6) / (2/3) = 1/4

5 0
3 years ago
How many times does 42 going to 96
anygoal [31]

Answer:

As a whole number, 2.

As a whole number with a remainder, 2 R12.

Precisely 2.28571429 if you want to get specific.

Step-by-step explanation:

96 ÷ 42 = 2 R12

or

96 ÷ 42 = 2.28571429

Hope this helps! :)

3 0
3 years ago
Read 2 more answers
Two integers, a and b have product of -48 what is the greatest possible sum of a and b.
dusya [7]
The factors of 48 are:
1 x 48
2 x 24
3 x 16
4 x 12
6 x 8
and visa versa:   48 x 1  etc.

To make the product negative, one of the factors has to be positive and one has to be negative.  To find the greatest sum, make the bigger number the positive factor and the smaller number the negative factor.  So, -1 x 48 = -48 and the sum of -1 + 48 = 47 which would be the greatest possible sum.
6 0
3 years ago
Magazines are packed into cartons for distribution. Each hour one person can pack 45 cartons. How many people are needed to pack
kipiarov [429]

Answer:

26

Step-by-step explanation:

One person can pack 45 cartoons per hour

Therefore the number of people needed to pack 1200 cartons can be calculated as follows

= 1200/45

= 26.66

= hence 26 people are needed to pack 1200 cartoons

7 0
3 years ago
Solve for u.<br> -6=-2u +4(u-5)
sergij07 [2.7K]

Answer: u=7

Step-by-step explanation:

-6= -2u+4(u-5)

-6= -2u+4u-20

-6= 2u-20

14= 2u

7=u

5 0
3 years ago
Read 2 more answers
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