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
REY [17]
2 years ago
7

Simplify:(-3x)(-2x5)

Mathematics
2 answers:
Sergio039 [100]2 years ago
5 0

Answer: 30x

Multiply  

−

2

by  

5

.

−

3

x

⋅

−

10

Multiply  

−

10

by  

−

3

.

30

x

vlada-n [284]2 years ago
5 0

Answer:

6x^{6}

Step-by-step explanation:

Using the rule of exponents

a^{m} × a^{n} ⇔ a^{(m+n)}

Given

(-3x)(-2x^{5})

= - 3 × x^{1} × - 2 ×x^{5}

= (- 3 × - 2) × x^{(1+5)}

= 6x^{6}

You might be interested in
What is the formula for the expected number of successes in a binomial experiment with n trials and probability of success​ p? C
charle [14.2K]

Answer:

(D)E[ X ] =np.

Step-by-step explanation:

Given a binomial experiment with n trials and probability of success​ p,

f(x)=\left(\begin{array}{c}n\\k\end{array}\right)p^x(1-p)^{n-x}, 0\leq  x\leq n

E(X)=\sum_{x=0}^{n}xf(x)= \sum_{x=0}^{n}x\left(\begin{array}{c}n\\k\end{array}\right)p^x(1-p)^{n-x}

Since each term of the summation is multiplied by x, the value of the term corresponding to x = 0 will be 0. Therefore the expected value becomes:

E(X)=\sum_{x=1}^{n}x\left(\begin{array}{c}n\\x\end{array}\right)p^x(1-p)^{n-x}

Now,

x\left(\begin{array}{c}n\\x\end{array}\right)= \frac{xn!}{x!(n-x)!}=\frac{n!}{(x-)!(n-x)!}=\frac{n(n-1)!}{(x-1)!((n-1)-(x-1))!}=n\left(\begin{array}{c}n-1\\x-1\end{array}\right)

Substituting,

E(X)=\sum_{x=1}^{n}n\left(\begin{array}{c}n-1\\x-1\end{array}\right)p^x(1-p)^{n-x}

Factoring out the n and one p from the above expression:

E(X)=np\sum_{x=1}^{n}n\left(\begin{array}{c}n-1\\x-1\end{array}\right)p^{x-1}(1-p)^{(n-1)-(x-1)}

Representing k=x-1 in the above gives us:

E(X)=np\sum_{k=0}^{n}n\left(\begin{array}{c}n-1\\k\end{array}\right)p^{k}(1-p)^{(n-1)-k}

This can then be written by the Binomial Formula as:

E[ X ] = (np) (p +(1 - p))^{n -1 }= np.

5 0
3 years ago
Trigonometry answer need
Sladkaya [172]
That is the answer..............
3 0
3 years ago
How many meters is 1/2 decameter
trapecia [35]

Answer: 5 meters

Step-by-step explanation: 1/2 = .5, if you move the decimal in front of the 5, you would go from .5 to 5

3 0
3 years ago
Please help asap!
lidiya [134]
You would distribute, 300 times 80 is 2400 and -3x times 1x is -3x so the equation would be y=2400-3x
8 0
2 years ago
Martina has a spinner with sections of equal size on section is labled left the other labled right what is the total sections th
enyata [817]
Well if their are only 2 section are able and they are all equal so it should be 2 parts
6 0
3 years ago
Other questions:
  • How many weeks will it take to play 20 tournaments
    13·1 answer
  • Write a formula to find the nth term of a geometric sequence -1/3,1/2,-3/4,9/8​
    13·1 answer
  • Today only, a sofa is being sold at a 29% discount. The sale price is $568 . What was the price yesterday?
    6·1 answer
  • An ion channel can be in either open (O) or closed (C) states. If it is open, then it has probability 0.1 of closing in 1 micros
    13·1 answer
  • 3. The population of a country increases by 2% every year. The current
    14·1 answer
  • Ten more than three times a number n is forty. How do you write this as an equation, plz i need help.
    15·1 answer
  • Pleaseeee helpppp!! thank you sm:(
    15·2 answers
  • A scientist used 786 milliliters of a liquid for an experiment. How many liters of the liquid did the scientist use for this exp
    14·2 answers
  • It is known that y^24 − 256 = 0. Rewrite this equation in terms of x if x = y^4.​
    12·2 answers
  • Factorise fully <br> -x-5
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!