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
GaryK [48]
2 years ago
6

Find the factored form of this trinomial. b2 - 11b - 12

Mathematics
1 answer:
Levart [38]2 years ago
3 0

Answer:

( b + 1 ) ( b - 12 )

You might be interested in
Hi people here hi hi oya
oksian1 [2.3K]

Answer:

Hi How are you doing today???

5 0
2 years ago
Read 2 more answers
The manager of a computer retails store is concerned that his suppliers have been giving him laptop computers with lower than av
34kurt

Answer:

Probability that the 50 randomly selected laptops will have a mean replacement time of 3.1 years or less is 0.0092.

Yes. The probability of this data is unlikely to have occurred by chance alone.

Step-by-step explanation:

We are given that the replacement times for the model laptop of concern are normally distributed with a mean of 3.3 years and a standard deviation of 0.6 years.

He then randomly selects records on 50 laptops sold in the past and finds that the mean replacement time is 3.1 years.

<em>Let M = sample mean replacement time</em>

The z-score probability distribution for sample mean is given by;

            Z = \frac{ M-\mu}{\frac{\sigma}{\sqrt{n} } }} }  ~ N(0,1)

where, \mu = population mean replacement time = 3.3 years

            \sigma = standard deviation = 0.6 years

            n = sample of laptops = 50

The Z-score measures how many standard deviations the measure is away from the mean. After finding the Z-score, we look at the z-score table and find the p-value (area) associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X.

Now, Probability that the 50 randomly selected laptops will have a mean replacement time of 3.1 years or less is given by = P(M \leq 3.1 years)

 P(M \leq 3.1 years) = P( \frac{ M-\mu}{\frac{\sigma}{\sqrt{n} } }} } \leq \frac{ 3.1-3.3}{\frac{0.6}{\sqrt{50} } }} } ) = P(Z \leq -2.357) = 1 - P(Z \leq 2.357)

                                                           = 1 - 0.99078 = <u>0.0092</u>  or  0.92%          

<em>So, in the z table the P(Z </em>\leq<em> x) or P(Z < x) is given. So, the above probability is calculated by looking at the value of x = 2.357 in the z table which will lie between x = 2.35 and x = 2.36 which has an area of 0.99078.</em>

Hence, the required probability is 0.0092 or 0.92%.

Now, based on the result above; <u>Yes, the computer store has been given laptops of lower than average quality</u> because the probability of this data is unlikely to have occurred by chance alone as the probability of happening the given event is very low as 0.92%.

8 0
3 years ago
At the hairdresser, Jenny had 27 centimeters cut off her hair. How many decimeters of hair did Jenny have cut off?
lions [1.4K]
1 centimetre=0.1 decimetre
therefore the answer is 2.5 decimetres.
3 0
3 years ago
Read 2 more answers
Manny owns 83 sets of basketball cards. Each set has exactly 504 cards. What is the total number of basketball cards manny owns?
tatyana61 [14]

Answer: 41,832

Step-by-step explanation:

504 x 83 = 41,832

4 0
3 years ago
Cindy was asked by her teacher to subtract 33 from a certain number and then divide the result by 99. ​Instead, she subtracted 9
Ainat [17]
You should get 1044.3 repeated
6 0
3 years ago
Other questions:
  • The measure of angle θ is 3pi/2 . The measure of its reference angle is /, and tan θ is .
    14·1 answer
  • Which list shows all the factors of 75?
    11·2 answers
  • A set of cards has 20 cards with stars, 10 cards with squares, and 15 cards with circles. Find the probability of each event whe
    5·1 answer
  • Make x the subject of the formula<br><br><br> x/2c = a + 4
    12·1 answer
  • The rule T 5, -0.5° Ro, 1800(x, ) is applied to FGH to
    13·1 answer
  • Through: (3,3), parallel to y=8/3x+5
    8·1 answer
  • What is the solution to the system of equations in the graph below?
    10·2 answers
  • I really need some help . I don’t know if my answer is correct or not ?
    7·2 answers
  • Nikki wants to buy a dog bed that cost $87 she earns six per week for doing chores how many weeks will Nikki have to do her chor
    14·2 answers
  • Charlotte drives 64 mph for the first 3 hours of her trip and 92 mph for last 4 hours.
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!