marisol56
22.08.2019 •
Mathematics
Solve the equation: -2/5 n = -30
a. n=-75
b. n=-12
c. n=12
d. n=75
Solved
Show answers
More tips
- A Animals and plants Want a Perfect Lawn? Learn How to Plant Grass the Right Way...
- A Animals and plants How to Properly Care for a Pet Decorative Rabbit at Home?...
- C Computers and Internet How to Check the Speed of My Internet?...
- H Health and Medicine 10 Ways to Cleanse Your Colon and Improve Your Health...
- W Work and Career How to Write a Resume That Catches the Employer s Attention?...
- C Computers and Internet Е-head: How it Simplifies Life for Users?...
- F Family and Home How to Choose the Best Diapers for Your Baby?...
- F Family and Home Parquet or laminate, which is better?...
- L Leisure and Entertainment How to Properly Wind Fishing Line onto a Reel?...
- L Leisure and Entertainment How to Make a Paper Boat in Simple Steps...
Answers on questions: Mathematics
- M Mathematics If u(x) = x^5 - x^4 + x^2 and v (x) = -x^2 which expression is equivalent to ( u/ v) (x)...
- M Mathematics Asquare box lid has an area of 57 square inches. find the length of one side to the nearest tenth of an inch. a. 28.5 inches b. 7.0 inches c. 6.5 inches d.7.5 inches...
- M Mathematics Tell whether each addition problem has a sum greater the 1/2. 1. 4/10+9/100 yes or no 2. 1/100+5/10 yes or no 3. 45/100+1/10 yes or no 4. 25/100+3/10 yes or no 5. 3/10+15/100...
- M Mathematics At a restaurant, daniella and her 10 friends decided to devide the bill evenly. if each person paid $20 then what was the total bill?...
- M Mathematics Craig earns extra money as a lifeguard. he earns $37 for 4 hours and $64.75 for 7 hours. explain how you know whether the relationship between earnings and time is a proportional...
- M Mathematics Tina is hiking in the grand canyon. she began the day 15 below sea level and ended her day 4,300 feet above sea level. how much higher did tina end the hike than she started...
- M Mathematics Can u guys answer these pythagoras theorem questions. first person to answer this questions will be marked as brainest answer...
- M Mathematics Iknow what the answer is but can someone explain to me why the answer is d.3 ?...
- M Mathematics 20. which problems will have two decimal places in the product? mark all that apply.5.31 x 10°a) 5 x 0.897.4 x 10d) 6.1 x 3(e) 3.2 x 4.3...
- M Mathematics This is geometry, angles in inscribed quadrilaterals,...
Ответ:
-2/5n = -30 <- We get rid of the "/5n" by multiplying each side by 5n
-2 = -30 * 5n
-2 = -150n
-1 = -75n
75n = 1
But this doesn't match up with any of your answers, so if you wouldn't mind giving me the equation again, i'll work it out
Ответ:
Ответ:
Step-by-step explanation:
Hello!
Y: sales of a product in a marketing district (million dollars)
X: population in a marketing district (million persons)
The objective is to test if there is a linear association between the sales of a product and the population of a marketing district.
Parameter; Estimated Value; 95 Percent Confidence limits
Intercept 7.43119 -1.18518 16.0476
Slope 0.755048 0.452886 1.05721
a.
To test if there is or not an association between these two variables, you have to do a hypothesis test for the slope. If the slope is equal to zero, there is no linear association between the two variables, if the slope is different from zero, then there is a linear association between the variables.
So the student's hypotheses are:
H₀: β = 0
H₁: β ≠ 0
The data the student used to conclude is the 95%CI for the slope [0.452886;1.05721]
To be able to decide over an hypothesis test using a confidence interval there are several conditions to be met, one of them is that the confidence level and the significance level should be complementary, this means that if the interval was constructed using 1 - α= 0.95, then the hypothesis test should be conducted with a significance level of α= 0.05.
Considering that the value of the slope stated in the null hypothesis is not included in the given interval, i.e. zero is not included in the CI, then the decision is to reject the null hypothesis.
Then it can be concluded that there is a linear association between the sales of a product and the population in a marketing district.
b.
Although in the context of the variables of study it makes no sense that the estimate of the intercept takes negative numbers, keep in mind that mathematically if possible and correct. This means that obtaining a negative estimate of the intercept does not represent a calculation error or problem for the regression model. In general, when this occurs, a footnote is made indicating has no biological meaning or sense in context.
After all, what you have done with the estimate is a mathematical assertion of the social variables.
I hope it helps!