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
KATRIN_1 [288]
3 years ago
8

It took John 12 hours riding his bike to make the round trip to his uncle's. If he averaged 20 mph out and 30 mph back, how long

did he travel each way? (Round answer to nearest tenth.)
Mathematics
2 answers:
sesenic [268]3 years ago
3 0

<span> Let d = dist traveled one way
Write a time equation;
time = dist/speed
d/20+d/30 = 12 </span>

lesya692 [45]3 years ago
3 0
I belive it would be 7 hours going and 5 hours coming back
You might be interested in
Suppose that 15% of the fields in a given agricultural area are infested with the sweet potato whitefly. One hundred fields in t
hram777 [196]

Answer:

a.\mu=15

b.\mu=7.8586 \ and  \ \mu=22.1414

c. Choice A- Based on limits above, it is unlikely that we would see x = 45, so it might be possible that the trials are not independent.

Step-by-step explanation:

a.Binomial distribution is defined by the expression

P(X=k)=C_k^n.p^k.(1-p)^{n-k}

Let n be the number of trials,n=100

and p be the probability of success,p=15\%

The mean of a binomial distribution is the probability x sample size.

\mu=np=100\times0.15=15

b.Limits within which p is approximately 95%

sd of a binomial distribution is given as:\sigma=\sqrt npq\\q=1-p

Therefore, \sigma=\sqrt(100\times0.015\times0.85)=3.5707

Use the empirical rule to find the limits. From the rule, approximately 95% of the observations are within to standard deviations from mean.

sd_1=>\mu-2\sigma=15-2\times3.3507=7.8586\\sd_2=>\mu-2\sigma=15+2\times3.3507=22.1414

Hence, approximately 95% of the observations are within 7.8586 and 22.1414 (areas of infestation).

c.  x=45 is not within the limits in b above (7.8586,22.1414). X=45 appears to be a large area of infestation. A.Based on limits above, it is unlikely that we would see x = 45, so it might be possible that the trials are not independent.

4 0
3 years ago
The ratio of workers to supervisors and factories 32 to 2. The ratio of male workers to female workers is 6 to 5. If there are 8
Margarita [4]

Answer:

The number of supervisor in the factory is 9 .

Step-by-step explanation:

Given as :

The ratio of workers to supervisors and factories 32 : 2

let the number of workers = 32 x

And The number of supervisors = 2 x

The ratio of male workers to female workers is 6:5

Let The number of male workers = 6 y

And The number of female worker = 5 y

The number of female workers at the plant = 80

So, 5 y = 80

∴  y = \frac{80}{5}

I.e y = 16

So, The number of male workers = 6 y = 6 × 16 = 96

Thus The Total number of worker in the factory =  The number of male workers + The number of female workers at the plant

Or, The Total number of worker in the factory = 96 + 80 = 146

Now , Again

∵ The ratio of workers to supervisors in factories 32 : 2

So, The number of workers = 32 x

I.e 146 = 32 x

∴ x = \frac{146}{32} = 4.5

So, The number of supervisors = 2 x = 2 × 4.5 = 9

Hence The number of supervisor in the factory is 9 . Answer

3 0
3 years ago
Read 2 more answers
∣x∣=−5<br> find an absoulute value
kati45 [8]

Answer:

5

Step-by-step explanatio

8 0
3 years ago
Read 2 more answers
Find the common ratio for the geometric sequence defined by the formula: an=40(2–√)n−1
Maksim231197 [3]

Answer:

b is the answer in your questions

3 0
2 years ago
Find the measure of the missing angles.<br> 106e<br> d<br> 54
Zarrin [17]
I’m not sure search it on goggle lol
4 0
3 years ago
Other questions:
  • 3x+5+4x+6<br>simplify this
    5·2 answers
  • Graph the function defined by f(x)= |-x-7|
    7·1 answer
  • What is the mass of a 3 cm cube of pine? (Reminder: The length, width, and height of a cube are all the same.)
    11·1 answer
  • Greek city-states began to form in 800 B.C. and in 200 A.D, Christians began getting persecuted. How many years passed between t
    13·1 answer
  • Create an array for<br>4x5.​
    15·1 answer
  • Please help me with this
    12·1 answer
  • F(x) = 3x3 - 5x2 +6x -12
    6·1 answer
  • Help Resa
    13·1 answer
  • Please help ASAP.. did I get it right or no ?? I put 96 if anybody can help please do
    14·1 answer
  • 3. Which of the following is a solution to the equation 16 = 4x – 4? (1 point)
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!