1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
elena55 [62]
3 years ago
14

Simplify the expression 3(9+4x−5) 3(9+4x−5) . 

Mathematics
2 answers:
matrenka [14]3 years ago
6 0
3(9+4x-5) 3(9+4x-5)
(27+12x-15) (27+12x-15)
x=1
Nataly [62]3 years ago
3 0
X=1, this is because you have to distribute the number 3 to each value in the parentheses and the multiply the answer by to since the equation is there twice 
You might be interested in
Algebraic expression for “six more than the quantity d times two.”
marusya05 [52]

Answer:

6 + (d * 2)

Step-by-step explanation:

You are adding 6 to the equation after the amount d times 2. In that case, a parentheses is required to round up d * 2.

6 0
2 years ago
Let U1, ..., Un be i.i.d. Unif(0, 1), and X = max(U1, ..., Un). What is the PDF of X? What is EX? Hint: Find the CDF of X first,
Kryger [21]

Answer:

E(X)= n \int_{0}^1 x^n dx = n [\frac{1}{n+1}- \frac{0}{n+1}]=\frac{n}{n+1}

Step-by-step explanation:

A uniform distribution, "sometimes also known as a rectangular distribution, is a distribution that has constant probability".

We need to take in count that our random variable just take values between 0 and 1 since is uniform distribution (0,1). The maximum of the finite set of elements in (0,1) needs to be present in (0,1).

If we select a value x \in (0,1) we want this:

max(U_1, ....,U_n) \leq x

And we can express this like that:

u_i \leq x for each possible i

We assume that the random variable u_i are independent and P)U_i \leq x) =x from the definition of an uniform random variable between 0 and 1. So we can find the cumulative distribution like this:

P(X \leq x) = P(U_1 \leq 1, ...., U_n \leq x) \prod P(U_i \leq x) =\prod x = x^n

And then cumulative distribution would be expressed like this:

0, x \leq 0

x^n, x \in (0,1)

1, x \geq 1

For each value x\in (0,1) we can find the dendity function like this:

f_X (x) = \frac{d}{dx} F_X (x) = nx^{n-1}

So then we have the pdf defined, and given by:

f_X (x) = n x^{n-1} , x \in (0,1)  and 0 for other case

And now we can find the expected value for the random variable X like this:

E(X) =\int_{0}^1 s f_X (x) dx = \int_{0}^1 x n x^{n-1}

E(X)= n \int_{0}^1 x^n dx = n [\frac{1}{n+1}- \frac{0}{n+1}]=\frac{n}{n+1}

6 0
3 years ago
How to figure out the equation 3/5 / 2/3
posledela

Answer:

2/5

Step-by-step explanation:

3/5 / 2/3

3/5 ÷ 2/3

Convert ÷ sign into multiplication, that will turn 2/3 into 3/2

3/5 X 2/3

Divide by 3

3/5 by 3

1/5

2/3 by 3

2/1

1/5 X 2/1

2/5

6 0
3 years ago
Read 2 more answers
Zoe placed colored blocks on a scale in science class. Each block weighed 0.8 ounces. The total weight of all the colored blocks
s344n2d4d5 [400]

Answer:

16 blocks. 12.8=(.8)x

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Solve the equation for x, where x is a real number (5 points): <br> 2x^2 + 15x + 4 = 0
vitfil [10]
To find the solutions to this equation, we can apply the quadratic formula. This quadratic formula solves equations of the form ax^2 + bx + c = 0
                           x  = [ -b ± √(b^2 - 4ac) ] / (2a)
                           x = [ -15 ± √((15)^2 - 4(2)(4)) ] / ( 2(2) )
                           x = [-15 ± √(225 - (32) ) ] / ( 4 )
                           x = [-15 ± √(193) ] / ( 4)
                           x = [-15 ± sqrt(193) ] / ( 4 )
                           x = -15/4 ± sqrt(193)/4
The answers are -15/4 + sqrt(193)/4 and -15/4 - sqrt(193)/4.
6 0
2 years ago
Other questions:
  • What it is simplified
    13·2 answers
  • 75% of this<br> number is 13.5
    8·2 answers
  • A small theater sold 72 tickets for a play. The ratio of adult tickets to child tickets was 4:1 the ratio of adults tickets to s
    14·1 answer
  • 27/64A bottled water company has designed a new cup for its dispenser. The cup will be a right circular cone with a three-inch r
    14·1 answer
  • How to find the value of this expression
    15·2 answers
  • Alright i have 4 separate questions to ask for this one i will label them number one through 4 so you don't get mixed up
    11·2 answers
  • Can you please help me with this one ive been doing math all day and its annoying me
    6·1 answer
  • The increase in length of an aluminum rod is twice the increase in length of an Invar rod with only a third of the temperature i
    7·1 answer
  • 5m=−10<br><br><br> Please <br> Help <br><br> Vinnie
    11·1 answer
  • Find the difference between the lengths of the longest and shortest sides of a rectangle if its area is 924 square milimetres an
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!