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
Dvinal [7]
3 years ago
5

What is the expression in factored form? 9x^2-4 show all work

Mathematics
1 answer:
ziro4ka [17]3 years ago
7 0

Answer:

(3x+2)(3x-2)

Step-by-step explanation:

we know that

A binomial is a Difference of Squares if both terms are perfect squares

we have

9x^{2} -4

so

9x^{2}=(3x)^{2} ---> is a perfect square

4=(2)^2 ----> is a perfect square

Both terms are perfect squares

The difference of squares is

9x^{2} -4=(3x+2)(3x-2) ----> by difference of squares

You might be interested in
Roger Brown works for the sanitation department. He earns a salary of $721.00 biweekly. His boss gave him
liq [111]

Answer:

2249 dollars more

Step-by-step explanation:

52 weeks in one year so divide by 2 and then multiply by 721 and then take that amount and dubtract the new salary 20.995 and subtract the previous annual amount and then boom 2295 more

3 0
3 years ago
Suppose that are Yi.....Yn are i.i.d random variables with a Nâ(âμY, Ï^2Y â) distribution. How would the probability density of
svp [43]

Answer:

b. As the sample size â increases, the variance of decreases. â So, the distribution of becomes highly concentrated around.

Step-by-step explanation:

Let : Yi,.... Yn are = i.i.d are random variables. The probability density of the distribution varies along with the sample size. When the sample size changes, the probability density of $E^3$ also changes.

The probability distribution may be defined as the statistical expression which defines the likelihood of any outcome for the discrete random variable and it can be opposed to the continuous random variable.

In the context, when the size of the sample of the distribution size increases, it causes a decrease in the variance and so the distribution becomes highly concentrated around.

5 0
2 years ago
Here is the photo someone please help
Alja [10]

Answer:

Rational

Integer

Whole

Real

Step-by-step explanation:

<u>Rational</u><u>:</u><u> </u>

The square root of 4 is 2, which is an integer (number without decimals). A number is only irrational if it has endless decimals after it.

<u>Integer</u><u>:</u>

A number without decimals

<u>Whole:</u>

A number without fractions; an integer.

<u>Real: </u>

Real numbers include whole numbers, rational numbers and irrational numbers- pretty much any number you can think of. The only numbers that ARENT considered real are imaginary numbers like √-1 and infinity.

7 0
3 years ago
The graph represents the data cost for monthly internet service for a cell phone. Which function, C(x), respresent the monthly c
Tanya [424]

Answer:

Correct option: first one

Step-by-step explanation:

The graph has 3 different parts:

Cost = 15 when the Gigabytes used is lesser than or equal 2,

Cost from 20 to 40 when the Gigabytes used is greater than 2 and lesser than or equal 6.

An increase of 4 gigabytes caused an increase of 20 in the cost, so the slope is 20/4 = 5, and the y-intercept is:

20 = 5*2 + b -> b = 10

Cost = 50 when the Gigabytes used is greater than 6.

So the correct option is the first one

3 0
3 years ago
A quiz in statistics course has four multiple-choice questions, each with five possible answers. A passing grade is three or mor
nekit [7.7K]

Answer:

a) 0.0016

b) 0.0224

Step-by-step explanation:

If every question has 5 possible answers, the probability of getting the correct answer by guessing would be 0.20. The probability of getting an incorrect answer would be 0.80.

a)Find the probability she lucks out and answers all four questions correctly.

To do this, Allison would have to guess right the first, second, third AND fourth answers. Therefore, we have to multiply the probabilities:

0.20 x 0.20 x 0.20 x 0.20 = 0.0016

The probability that she answers all 4 questions correctly is 0.0016.

b) Find the probability that she passes the quiz.

To pass the quiz, she has to have three OR 4 correct answers:

  1. The probability that she has 3 correct answers is: 0.20 x 0.20 x 0.20 x 0.80 (since she has to have 1 correct answer and 1 incorrect one) = .0064.
  2. We already calculated the probability that she guesses 4 answers correctly: 0.0016.

Now, we have to sum up these two scenarios:

0.0064 + 0.016 = 0.0224.

Thus, the probability that she passes the quiz is 0.0224

3 0
3 years ago
Other questions:
  • Lenny is saving up to buy a car. The table below shows the linear relationship between how much Lenny has saved and the number o
    13·1 answer
  • Please I Need Help Right Now just for question 1,2,3
    12·1 answer
  • How do i order 0.5,0.41,3/5 from least to greatest
    13·1 answer
  • How l can write a 3-digit number using digits 2,9,4.
    9·2 answers
  • It costs$15 to send 3 packages through a certain shipping company Consider the number of packages per dollar.
    5·1 answer
  • What num com between 4 and 6?
    7·2 answers
  • Which expression is equivalent to 8-(6r+2) HELP SMB PLEASE!
    5·1 answer
  • Help pleaseeeee nowwwwwwww
    12·1 answer
  • 12 cm<br> 6 cm <br> What is the area of this
    5·2 answers
  • The baseball player threw the ball 30 feet to his teammate. How far would the throw be if measured in yards?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!