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LekaFEV [45]
3 years ago
15

Help with this, giving 20 points!

Mathematics
1 answer:
Bond [772]3 years ago
3 0

Answer:

Step-by-step explanation:

the shape is a rhombus the are is 24

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Solve for Z. No fractions or variables in solution.
Lorico [155]

x + y - 7 = z

awesome

5 0
3 years ago
Use the distributive property to remove the parentheses?<br><br> -8(-4w-3v+6)
olganol [36]

Answer:

32w + 24v - 48

Step-by-step explanation:

- 8(- 4w - 3v + 6) ← multiply each term in the parenthesis by - 8

= 32w + 24v - 48

4 0
2 years ago
In the game of​ roulette, a wheel consists of 38 slots numbered​ 0, 00,​ 1, 2,..., 36. To play the​ game, a metal ball is spun a
Oxana [17]

Answer:

E(X)=-0.0526

Sd(X)=5.763

Step-by-step explanation:

In statistics and probability analysis, the expected value "is calculated by multiplying each of the possible outcomes by the likelihood each outcome will occur and then summing all of those values".

The variance of a random variable Var(X) is the expected value of the squared deviation from the mean of X, E(X).

And the standard deviation of a random variable X is just the square root of the variance.  

Let X be a random variable which denotes the money you may win or lose on each spin.

In the game of roulette, a wheel consists of 38 slots. To play the game, a metal ball is spun around the wheel and is allowed to fall into one of the numbered slots. If the number of the slot the ball falls into matches the number you selected, we win $35; otherwise we lose $1.  So we have just one possibility to win and 37 of lose on an individual game.

___________________________

X            P(X)

___________________________

35           1/38

-1            37/38

___________________________

In order to calculate the expected value we can use the following formula:

E(X)=\sum_{i=1}^n X_i P(X_i)

And if we use the values obtained we got:

E(X)=(35)*(\frac{1}{38})+(-1)(\frac{37}{38})=-0.0526

In order to find the standard deviation we need to find first the second moment, given by :

E(X^2)=\sum_{i=1}^n X^2_i P(X_i)

And using the formula we got:

E(X^2)=(35^2)*(\frac{1}{38})+((-1)^2)(\frac{37}{38})=33.211

Then we can find the variance with the following formula:

Var(X)=E(X^2)-[E(X)]^2 =33.211-(-0.0526)^2 =33.208

And then the standard deviation would be given by:

Sd(X)=\sqrt{Var(X)}=\sqrt{33.208}=5.763

4 0
3 years ago
PLEASE HELP ME!!! THIS WAS DUE ON FRIDAY!!!!! I'LL GIVE YOU THE REST OF MY POINTS!!!
lorasvet [3.4K]
The first term is 5. The sequence goes by 2. And 23 is the 9th term. 9x2=18

23-18=5
7 0
2 years ago
It’s takes 53 minutes for 6 people to paint 6 walls. How many minutes does it take 20 people to paint 20 walls ?
kramer

Answer:

53

Step-by-step explanation:

It is a trick question. 6 people to paint 6 walls will take 53. 20 people to paint 20 walls will take 53 minutes.

7 0
3 years ago
Read 2 more answers
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