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
pickupchik [31]
3 years ago
7

Explain how you would factor 9x^2 – 49 show your work and use complete sentences. what is this special type of factoring called?

Mathematics
1 answer:
tatuchka [14]3 years ago
3 0
9x² - 49

(3x)² - (7)²

= (3x + 7)(3x - 7)

This type of factoring is called Difference of Two Squares

where x² - y² = (x + y)(x - y)
You might be interested in
Based on a​ poll, 60​% of adults believe in reincarnation. Assume that 5 adults are randomly​ selected, and find the indicated p
vlabodo [156]

Answer:

There is a 25.92% probability that exactly 4 of the selected adults believe in​ reincarnation.

Step-by-step explanation:

For each adult, there are only two possible outcomes. Either they believe in reincarnation, or they do not believe. This means that we can solve this problem using the binomial probability distribution.

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 combinatios 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

There are 5 adults, so n = 5

60% believe in reincarnation, so p = 0.6

What is the probability that exactly 4 of the selected adults believe in​ reincarnation?

This is P(X = 4).

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

P(X = 4) = C_{5,4}.(0.6)^{4}.(0.4)^{1} = 0.2592

There is a 25.92% probability that exactly 4 of the selected adults believe in​ reincarnation.

3 0
3 years ago
How do I do this and work it out
stepladder [879]
Do you know your coordinate plains??
3 0
3 years ago
Mike had some candy to give to his four
zimovet [89]
10 pieces there was five people each got two pieces
6 0
3 years ago
Read 2 more answers
Three times a number increased by 20, is 14 less than the product of five and the 1095
Zinaida [17]

3x + 20 = (5 \times 1095) - 14 \\ 3x + 20 = 5475 - 14 \\ 3x = 5461 - 20 \\ 3x = 5441 \\ x =  \frac{5441}{3}

8 0
2 years ago
2. One of the offices at the company was being repainted. Riley’s mother challenged him to figure out how many quarts of paint w
beks73 [17]
Not enough information. The question doesn't say how much one quart of paint covers.

EDIT: here's the solution

we have to find the total area of the 4 walls and subtract the area of the door. there are 2 walls with dimensions 16 by 10, and 2 walls with dimensions 16 by 12. so we have: 2(16*10)+2(16*12)=320+384=704 for the area of the walls. now, we can find the area of the door which is 3*8=24. <span>so we subtract the area of the door from the area of the walls, so we have: 704-24=680. </span><span>Since a quart of paint covers 100, then we divide and get 680/100=6.8 but since we need a whole number of quarts, we round up to get 7 quarts of paint. </span>
4 0
3 years ago
Other questions:
  • Determine the solution to the following system of linear equations.
    8·1 answer
  • How to study microeconomics\accounting\access\calculous?
    6·1 answer
  • Evaluate. 68.14 + 0.0007
    14·1 answer
  • Nathan bought a cd for his friend. The length and width of the cd case is 4 18?25 inches. What is the area of the cd case?
    5·1 answer
  • the radius of a sphere is halved. What fraction of the original volume is the volume of the smaller sphere
    5·1 answer
  • 26 - x = 17 <br> What does x equal?
    10·2 answers
  • 4. Determine whether each equation defines y as a function of x.
    5·1 answer
  • The school that Mary goes to is selling tickets to a fall musical. On the first day of ticket sales
    11·1 answer
  • Old machine: 8.2, 8.0, 7.9, 7.9, 8.5, 7.9, 8.1,8.1, 8.2, 7.9
    13·1 answer
  • Please help will give brainliest
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!