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
grin007 [14]
3 years ago
13

Anyone please help !!

Mathematics
1 answer:
yuradex [85]3 years ago
8 0

Answer:

The answer for the first problem is B. The answer to the second problem is A.

Step-by-step explanation:

Explanation for first problem: Factor the equation and get (w+5)(w-4). Then multiply the numerator of the equation (w-3) by (w-4) and get w²-7w+12.

Explanation for second problem: Plug in the values of choice A., -2 and 4, and they cause the denominators to equal 0 which is against the rules or considered illegal.

You might be interested in
A researcher examines 27 water samples for iron concentration. The mean iron concentration for the sample data is 0.802 cc/cubic
Delvig [45]

Answer:

90% confidence interval for the population mean iron concentration is [0.771 , 0.832].

Step-by-step explanation:

We are given that a researcher examines 27 water samples for iron concentration. The mean iron concentration for the sample data is 0.802 cc/cubic meter with a standard deviation of 0.093.

Firstly, the pivotal quantity for 90% confidence interval for the population mean iron concentration is given by;

         P.Q. = \frac{\bar X - \mu}{\frac{s}{\sqrt{n} } } ~ t_n_-_1

where, \bar X = sample mean iron concentration = 0.802 cc/cubic meter

             s = sample standard deviation = 0.093

             n = number of water samples = 27

             \mu = population mean

<em>Here for constructing 90% confidence interval we have used t statistics because we don't know about population standard deviation.</em>

So, 90% confidence interval for the population mean, \mu is ;

P(-1.706 < t_2_6 < 1.706) = 0.90  {As the critical value of t at 26 degree of

                                                 freedom are -1.706 & 1.706 with P = 5%}

P(-1.706 < \frac{\bar X - \mu}{\frac{s}{\sqrt{n} } } < 1.706) = 0.90

P( -1.706 \times {\frac{s}{\sqrt{n} } } < {\bar X - \mu} < 1.706 \times {\frac{s}{\sqrt{n} } } ) = 0.90

P( \bar X -1.706 \times {\frac{s}{\sqrt{n} } < \mu < \bar X +1.706 \times {\frac{s}{\sqrt{n} } ) = 0.90

<u>90% confidence interval for</u> \mu = [ \bar X -1.706 \times {\frac{s}{\sqrt{n} } , \bar X +1.706 \times {\frac{s}{\sqrt{n} } ]

                                                 = [ 0.802 -1.706 \times {\frac{0.093}{\sqrt{27} } , 0.802 +1.706 \times {\frac{0.093}{\sqrt{27} } ]

                                                 = [0.771 , 0.832]

Therefore, 90% confidence interval for the population mean iron concentration is [0.771 , 0.832].

4 0
3 years ago
How many miles would Tegan bike 16 hours?
lions [1.4K]
252 is the answer hope it helps
3 0
3 years ago
Read 2 more answers
Express 1 cm3 in m3 please help ​
Oksana_A [137]

Answer:

1E-6 m^3 or 0.000001 m^3

Step-by-step explanation:

1cm^3 = 1cm*1cm*1cm

1m^3 = 100cm*100cm*100cm = 1000000 cm^3

1/1000000 = 1E-6 m^3

Leave a like and mark brainliest if this helped

Leave a like and mark brainliest if this helped

7 0
2 years ago
The teachers sold 32 tickets this is 80% of the tickets given to the teachers how many tickets were given to the teachers
UkoKoshka [18]
You would give the teacher 40 tickets
6 0
2 years ago
Read 2 more answers
The intersection of two planes can be a point true or false
sergij07 [2.7K]

Answer:

true

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the difference between -4 and -14
    6·2 answers
  • Fined the missing angle for the triangle. Angle 1=72 Degrees. Angle 2 =74Degrees. Angle 3 = ???Degrees
    8·2 answers
  • The sum of a number divided by 8 and 6 is 3
    14·1 answer
  • Could anyone help me with this question? And could you also provide a explanation? I would be so grateful for any help.
    10·1 answer
  • I think the answer might be 2 1/3, square root of 5,2.5, and square root of 8
    14·1 answer
  • Which of the following is equal to 142 ÷ 2? A. (100 ÷ 40) + (40 ÷ 2) + (2 ÷ 2) B. (100 + 2) ÷ (40 + 2) ÷ (2 + 2) C. (100 ÷ 2) -
    7·2 answers
  • Write the following in standard form: 603-8:2+ + 5.0 + 12.2^9.
    14·1 answer
  • For there is always light, if only we’re brave enough to see it.
    9·2 answers
  • Which equation represents a line which is parallel to x=0? <br>y=5<br>x=4<br>x=1/4y<br>x=−4y​
    8·1 answer
  • HELP MEE ,25 POINTS !!!!
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!