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
Serjik [45]
4 years ago
5

Please help!posted picture of question

Mathematics
1 answer:
Anna007 [38]4 years ago
6 0

We can add, subtract, multiply, and divide functions just like how we add, subtract, multiply, and divide numbers. To find (f + g)(x) from the given functions f(x) and g(x), we just add the two formulas:
     (f + g)(x) = f (x) + g(x)
     (f + g)(x) = [3x + 1 ] + [x^2 - 6]
Then, we simplify the expressions to
     (f + g)(x) = 3x + 1 + x^2 - 6
     (f + g)(x) = x^2 + 3x - 5
Therefore our answer is x^2 + 3x - 5
You might be interested in
what is 2/a = a/50. These are factions if you already didn't know. I need to know what the answer is. it is a proportion.
Natalija [7]
2/a= a/50

Cross multiply:
a* a= 2*50
⇒ a^2= 100
⇒ a= √100 or a= -√100
⇒ a= 10 or a= -10

Final answer: a= 10 or a= -10~
3 0
4 years ago
Round 5.955 to the nearest tenth.
I am Lyosha [343]

Answer:

6.

Step-by-step explanation:

To round 5.955 to the nearest tenth consider the hundredths’ value of 5.955, which is 5 and equal or more than 5. Therefore, the tenths value of 5.955 increases by 1 to 0.

6 0
3 years ago
Read 2 more answers
监视球<br> 帮助我<br> Pleasu帮助<br><br> PLEASE HELPU
ValentinkaMS [17]
Hrcku hdxvhjgf hgdchuh bbbbb logs. Job hrvh
7 0
3 years ago
Read 2 more answers
What is the comparison between the 3 in 350 and the 3 in 403?
qaws [65]

The 3 in 350 is in the hundreds column and has a value of 300

The 3 in 403 is in the units column and has a value of 3


6 0
3 years ago
A simple random sample of size nequals=8181 is obtained from a population with mu equals 77μ=77 and sigma equals 27σ=27. ​(a) De
ivanzaharov [21]

Answer:

a) P(\bar X>81.5)=1-0.933=0.067

b) P(\bar X

c) P(73.4  

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Let X the random variable that represent interest on this case, and for this case we know the distribution for X is given by:

X \sim N(\mu=77,\sigma=27)  

And let \bar X represent the sample mean, the distribution for the sample mean is given by:

\bar X \sim N(\mu,\frac{\sigma}{\sqrt{n}})

On this case  \bar X \sim N(77,\frac{27}{\sqrt{81}})

Part a

We want this probability:

P(\bar X>81.5)=1-P(\bar X

The best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}

If we apply this formula to our probability we got this:

P(\bar X >81.5)=1-P(Z

P(\bar X>81.5)=1-0.933=0.067

Part b

We want this probability:

P(\bar X\leq 69.5)

If we apply the formula for the z score to our probability we got this:

P(\bar X \leq 69.5)=P(Z\leq \frac{69.5-77}{\frac{27}{\sqrt{81}}})=P(Z

P(\bar X\leq 69.5)=0.0062

Part c

We are interested on this probability

P(73.4  

If we apply the Z score formula to our probability we got this:

P(73.4

=P(\frac{73.4-77}{\frac{27}{\sqrt{81}}}

And we can find this probability on this way:

P(-1.2

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-1.2

3 0
4 years ago
Other questions:
  • Joe wants to use the Hiking Club's funds to purchase new walking sticks for each of its 19 members. The sticks cost $26 each. Th
    5·1 answer
  • Select the equation that is true for all values of x?
    5·1 answer
  • Arrange the numbers in decreasing order of their values.
    14·1 answer
  • If one apple costs .25 and i want to buy 100 apples how much will it cost
    7·1 answer
  • Find the <br> x-intercept and <br> y-intercept of the line.
    5·1 answer
  • 3 (4x - 2) - 5x = 6 - 7 (-x -2)
    11·1 answer
  • Need help ASAP ..... Which of the following pairs best describes a transformation of Figure 1 into Figure 2 followed by a transf
    13·1 answer
  • PLEASEEE HELP!!!
    14·1 answer
  • The perimeter of a rectangle
    14·1 answer
  • Help me with this two question please
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!