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zheka24 [161]
3 years ago
5

Graph a right triangle with the two points forming the hypotenuse. Using the sides,

Mathematics
1 answer:
valentinak56 [21]3 years ago
5 0

Answer:

Step-by-step explanation:

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Multiply. Write answer in box below.<br> (3x - 4)(x+4)
adell [148]

Answer:3x^2+8x-16

Step-by-step explanation:

4 0
2 years ago
The random variable x has the following probability distribution: x f(x) 0 .25 1 .20 2 .15 3 .30 4 .10 a. Is this probability di
Reptile [31]

Answer and Explanation:

Given : The random variable x has the following probability distribution.

To find :

a. Is this probability distribution valid? Explain and list the requirements for a valid probability distribution.

b. Calculate the expected value of x.

c. Calculate the variance of x.

d. Calculate the standard deviation of x.

Solution :

First we create the table as per requirements,

x      P(x)         xP(x)           x²            x²P(x)

0    0.25           0               0                0

1     0.20        0.20             1              0.20

2    0.15          0.3               4             0.6

3    0.30         0.9               9             2.7

4    0.10          0.4               16             1.6

   ∑P(x)=1     ∑xP(x)=1.8               ∑x²P(x)=5.1

a) To determine that table shows a probability distribution we add up all five probabilities if the sum is 1 then it is a valid distribution.

\sum P(X)=0.25+0.20+0.15+0.30+0.10

\sum P(X)=1

Yes it is a probability distribution.

b) The expected value of x is defined as

E(x)=\sum xP(x)=1.8

c) The variance of x is defined as

V=\sum x^2P(x)-(\sum xP(x))^2\\V=5.1-(1.8)^2\\V=5.1-3.24\\V=1.86

d) The standard deviation of x is  defined as

\sigma=\sqrt{V}

\sigma=\sqrt{1.86}

\sigma=1.136

5 0
2 years ago
Solve for x x=750+125.75x
olga2289 [7]
X=750+125.75x
subtract to variable (x) on one side
x-125.75x=750+125.75x-125.75x
-124.75x=750
divide -124.75 to get variable (x) by itself
-124.75x/-124.75=750/-124.75
x=-3000/499
or
x=-6 6/499
or
x=-6.01202

7 0
2 years ago
Write the solutions for the equation 3x+y=180°
Nadusha1986 [10]
180/3x then you get you answer 

4 0
3 years ago
Read 2 more answers
The options are -63/16, -61/16,-59/16, -31/8, -15/4, -29/8
SSSSS [86.1K]

Answer:

-31/8. That's the answer to your question

3 0
2 years ago
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