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konstantin123 [22]

3 years ago

12

There are 10 keys and only one of them can open a lock. We do not know which key can open the lock, but we will try them one by

one until we find the right key. Let X denote the number of times tried to find the right key what is the pmf of X

1 answer:

CaHeK987 [17]3 years ago

7 0

Answer:

thhhhhhheeeeeeeee p.m.f of x

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How to find rate of change on a table

LekaFEV [45]

Answer:

__X__l__Y_

1 l 3

5 l 6

9 l 9

13 l 12

17 l 15

21 l 18

On the right side, the numbers get larger by adding three each time. On the left side, the numbers get larger by adding 4 each time. It would be the same for any other pair of numbers when you add 4 to the left, and 3 to the right. For instance, the next pair would be (25 , 21). 25 would be the X value, and 21 would be the Y value.

4 0

3 years ago

3. Given: ABCE is a rectangle. D is the midpoint of E.

Georgia [21]

Answer with Step-by-step explanation:

We are given that

ABCE is a rectangle .Rectangle is that quadrilateral in which opposite sides are equal and each is equal to 90 degrees.

D is the midpoint of E.

We have to prove that $AD\cong BD$

Statement:1 ABCE is a rectangle.D is the mid point of CE

Reason: Given

Statement 2: $\angle AED\cong \angle BCD$

Reason:By definition of rectangle

Statement:3 AE=BC

Reason: By definition of rectangle

Statement 4: $ED=DC$

Reason: By definition of midpoint because D is the midpoint of side EC

Statement 5: $\triangle AED\cong \triangle BCD$

Reason:SAS postulate

Statement: 6 $AD\cong BD$

Reason:CPCT

Hence proved.

7 0

3 years ago

Can someone help me solve this:<br><br> ... = 72x1/12

Fudgin [204]

864 is the answer to the question that you asked just use a calculator

3 0

3 years ago

Read 2 more answers

What would the graph of the solution to the following inequality look like?

yan [13]

Answer: A. An OPEN circle on the number 5 and an arrow shading to the RIGHT.

6 0

3 years ago

A family has two cars. the first car has a fuel efficiency of 20 miles per gallon of gas and the second has a fuel efficiency of

tatyana61 [14]

Let's call the fuel consumption of the first car "x" and the second car "y"
x + y = 35 is the total fuel consumed.
20x + 25y = 775 is the distance traveled.
Solve the two equations. Skipping a few steps, I get
5y = 75. Therefore y = 15. So y used 15 gallons of gas. Therefore x used 20 gallons.

20 gallons, 15 gallons.

4 0

3 years ago