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blondinia [14]
3 years ago
7

(2x+1)^2-2(2x^2-1) Simplify

Mathematics
1 answer:
Iteru [2.4K]3 years ago
8 0

The answer is 4x+3 because thats how the mafia works

Let's simplify step-by-step.

(2x+1)2−2(2x2−1)

Distribute:

=4x2+4x+1+(−2)(2x2)+(−2)(−1)

=4x2+4x+1+−4x2+2

Combine Like Terms:

=4x2+4x+1+−4x2+2

=(4x2+−4x2)+(4x)+(1+2)

=4x+3

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In your own words, define each of the following terms. 
Leya [2.2K]
A. Whole number- a number that is whole, with no decimals or extra signs or variables next to or part of it. 

b. Digit- a number from 0-9 is a digit. 

c. The position a number has in a larger number. ex. Hundreds, Tens, and One's place

d. A number rounded to a whole number. Either to a smaller or larger to make it whole and easier to understand. 

e. Equals: Numbers that equal each other. 

I hope this helps you.

Brainliest answer would be appreciated!

6 0
3 years ago
Read 2 more answers
Its easy for most people i really need help what is x? 2x+17=95
UNO [17]

Answer: 39

Step-by-step explanation:

2x+17-17=95-17 so 2x=78 if you divide both sides by two you will find x=39

3 0
3 years ago
A levee was designed to protect against floods with an annual exceedance probability of 0.02. A larger flood would cause the lev
LuckyWell [14K]

Answer:

66.76% probability that the levee will NEVER fail in the next 20 years.

Step-by-step explanation:

For each year, there are only two possible outcomes. Either a levee fails during the year, or no levees fail. In each year, the probabilities of levees failing are independent from each other. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

In this problem we have that:

A levee was designed to protect against floods with an annual exceedance probability of 0.02. This means that p = 0.02

What is the risk that the levee will NEVER fail in the next 20 years?

This is P(X = 0) when n = 20. So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{20,0}*(0.02)^{0}*.(0.98)^{20} = 0.6676

66.76% probability that the levee will NEVER fail in the next 20 years.

7 0
3 years ago
Help me with this please #17
jasenka [17]

9514 1404 393

Answer:

  C. symmetric with respect to the origin

Step-by-step explanation:

A graph must pass the vertical line test to be called the graph of a function. No function will ever be symmetrical with respect to the x-axis, because that would mean it fails the vertical line test.

An even function is symmetrical about the y-axis. An even function has the characteristic that ...

  f(-x) = f(x) . . . . an even function

An odd function is symmetrical about the origin. An odd function has the characteristic that ...

  f(-x) = -f(x)

__

The given function is f(x) = -1/x. Then the value of f(-x) is ...

  f(-x) = -1/-x = 1/x = -f(x)

The given function is an odd function, so is symmetrical about the origin.

5 0
2 years ago
What is the scientific notation for 222,000,000 ?
Leya [2.2K]
Rules for SN = must be a number from 1 and less than 10 times a power of 10

So our number becomes

2.22 x 10⁸  - It takes a move of 8 places to the right to make the number 222,000,000 
6 0
3 years ago
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