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Elina [12.6K]
2 years ago
12

The diagonals of quadrilateral WXYZ intersect at R. If R is the midpoint of WY¯¯¯¯¯¯¯and XZ¯¯¯¯¯¯, which additional statement sh

ows that WXYZ is a rectangle?
Mathematics
1 answer:
Viefleur [7K]2 years ago
5 0

Answer:

m∠WXY = 90°

Step-by-step explanation:

A quadrilateral is a polygon with four sides and four angles.

A rectangle is a quadrilateral with two pairs of opposite and parallel sides. The following are properties of a rectangle:

  1. Opposite sides are congruent to each other.
  2. Opposite sides are parallel to one another.
  3. The diagonals are equal to each other.
  4. The diagonals bisect each other.
  5. All the interior angles are equal to each other. Each interior angle measures 90°.

Given quadrilateral WXYZ.  R is the midpoint of WY and XZ.

This means that R is the midpoint of the diagonals WY and XZ. this shows that the diagonals bisect each other.

For quadrilateral WXYZ to be a rectangle, each interior angle must be 90°. Hence m∠WXY = 90°

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The number of years a radio functions is exponentially distributed with parameter λ = 1 8 . If Jones buys a used radio, what is
blsea [12.9K]

Answer:

P(X>8)=e^{-1}

Step-by-step explanation:

The exponential distribution is "the probability distribution of the time between events in a Poisson process (a process in which events occur continuously and independently at a constant average rate). It is a particular case of the gamma distribution". The probability density function is given by:

P(X=x)=\lambda e^{-\lambda x}, x>0

And 0 for other case. Let X the random variable that represent "The number of years a radio functions" and we know that the distribution is given by:

X \sim Exp(\lambda=\frac{1}{8})

We can assume that the random variable t represent the number of years that the radio is already here. So the interest is find this probability:

P(X>8|X>t)

We have an important property on the exponential distribution called "Memoryless" property and says this:

P(X>a+t| X>t)=P(X>a)

Where a represent a shift and t the time of interest.

On this case then P(X>8|X>t)=P(X>8+t|X>t)=P(X>8)

We can use the definition of the density function and find this probability:

P(X>8)=\int_{8}^{\infty} \frac{1}{8}e^{-\frac{1}{8}x}dx

=\frac{1}{8} \int_{8}^{\infty} e^{-\frac{1}{8}x}dx

=[lim_{x\to\infty} (-e^{-\frac{1}{8}x})+e^{-1}]=0+e^{-1}=e^{-1}

8 0
3 years ago
What is the common ratio for the geometric sequence?
sashaice [31]
What is the common ratio for the geometric sequence?

24,−6,3/2,−3/8,...

Common ratio=-1/4

5 0
3 years ago
The cost in dollars of producing x vehicles for a company is given by C(x)=1200x+5500
GarryVolchara [31]

The rate of change represents the <em>variable production</em> cost rate. The <em>production</em> cost is increased in 1200 units per each <em>additional</em> manufactured car.

<h3>Interpretation of a linear function</h3>

Let be C and x the production cost and the number of vehicles produced, it there is a <em>linear</em> relationship between the two variables, then we have the following formula:

C(x) = \dot r \cdot x + C_{o} (1)

Where:

  • C_{o} - Fixed production costs.
  • \dot r - Variable production cost rate.

In a nutshell, the rate of change represents the <em>variable production</em> cost rate. The <em>production</em> cost is increased in 1200 units per each <em>additional</em> manufactured car. \blacksquare

To learn more on rates of change, we kindly invite to check this verified question: brainly.com/question/8223651

7 0
2 years ago
Given: PQ = RS, QR = 11, QS = x + 19, and RS = 2X. Find QS.<br> Can someone help
nalin [4]

QS =25

Step-by-step explanation:

QR + RS = QS

18 + (x-11) =2x-11

7 +x =2x -11

18=x

Plug in x

2(18) -11

36-11

QS=25

18 + (18-11) = 2(18)- 11

18+ 7 = 36 -11

25= 25

True

Answer:

QS + QR > RS

QR + RS > QS

RS + QS > QR

Step-by-step explanation:

Hope it helps you!

3 0
3 years ago
Solve for y. y + 8x = 1​
BARSIC [14]

Answer:

The value of y is y = -8x + 1.

Step-by-step explanation:

y + 8x = 1 \\   \frac{ \:  \:  \:  \:  \:  \:  \:  \:  \:  - 8x =  - 8x}{y =  - 8x + 1}

▪Happy To Help <3

6 0
2 years ago
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