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
otez555 [7]
3 years ago
15

Distribute: 4(3x + 7)

Mathematics
2 answers:
adelina 88 [10]3 years ago
4 0
The correct answer is d
Semenov [28]3 years ago
3 0
The answer is 12x + 28
You might be interested in
BRAINLIEST IF CORRECT PLZ HURRY
IgorC [24]
1/4 cup I’m assuming
7 0
2 years ago
Read 2 more answers
Find the length of BC.
Murrr4er [49]

Answer:

C, 53.68 units

Step-by-step explanation:

tan 54° = \frac{x}{39}

39 tan 54° = x

x= 53.6788949 (just plug it in a scientific or graphing calculator)

x≈53.68

4 0
2 years ago
The National Center for Education Statistics surveyed a random sample of 4400 college graduates about the lengths of time requir
Paha777 [63]

Answer:

95​% confidence interval for the mean time required to earn a bachelor’s degree by all college students is [5.10 years , 5.20 years].

Step-by-step explanation:

We are given that the National Center for Education Statistics surveyed a random sample of 4400 college graduates about the lengths of time required to earn their bachelor’s degrees. The mean was 5.15 years and the standard deviation was 1.68 years respectively.

Firstly, the pivotal quantity for 95% confidence interval for the population mean is given by;

                              P.Q. =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample mean time = 5.15 years

            \sigma = sample standard deviation = 1.68 years

            n = sample of college graduates = 4400

            \mu = population mean time

<em>Here for constructing 95% confidence interval we have used One-sample z test statistics although we are given sample standard deviation because the sample size is very large so at large sample values t distribution also follows normal.</em>

<u>So, 95% confidence interval for the population mean, </u>\mu<u> is ;</u>

P(-1.96 < N(0,1) < 1.96) = 0.95  {As the critical value of z at 2.5%

                                               level of significance are -1.96 & 1.96}  

P(-1.96 < \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } } < 1.96) = 0.95

P( -1.96 \times {\frac{\sigma}{\sqrt{n} } } < {\bar X-\mu} < 1.96 \times {\frac{\sigma}{\sqrt{n} } } ) = 0.95

P( \bar X-1.96 \times {\frac{\sigma}{\sqrt{n} } } < \mu < \bar X+1.96 \times {\frac{\sigma}{\sqrt{n} } } ) = 0.95

<u>95% confidence interval for</u> \mu = [ \bar X-1.96 \times {\frac{\sigma}{\sqrt{n} } } , \bar X+1.96 \times {\frac{\sigma}{\sqrt{n} } } ]

                                              = [ 5.15-1.96 \times {\frac{1.68}{\sqrt{4400} } } , 5.15+1.96 \times {\frac{1.68}{\sqrt{4400} } } ]

                                             = [5.10 , 5.20]

Therefore, 95​% confidence interval for the mean time required to earn a bachelor’s degree by all college students is [5.10 years , 5.20 years].

8 0
3 years ago
The temperature in an oven changes from 350 degrees to 362% What is the percent increase in temperature, to the nearest tenth of
Darya [45]

Answer:

3.43%

Step-by-step explanation:

362-350=12

12:350*100 =

(12*100):350 =

1200:350 = 3.43

3 0
3 years ago
This image is made of a rectangle and a triangle. Find its area in square meters.
maw [93]

Answer:

sorry i did my math wrong its...I think its 84 meters

3 0
2 years ago
Other questions:
  • What is the area if the radius is 11.7
    12·1 answer
  • Write the first six terms of the arithmetic sequence The first term
    15·1 answer
  • Can someone help me with this equation a+2/2=-1
    5·2 answers
  • What do b times h mean
    13·2 answers
  • The Anderson family drove 7.5 hours on the first day of their road trip how many seconds is equivalent to
    14·1 answer
  • Find the value of x.
    7·2 answers
  • Help me out not all just what you can
    5·1 answer
  • Please Help Me Thanks! NO LINKS
    8·1 answer
  • 6 1⁄6 - 3 5⁄12 =<br> plz help me with it
    7·1 answer
  • Pls tell me what is 152 + 466
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!