The answer is x= 20.
Plug 8 in for y and then add 2 to both sides. You'll get 10= 1/2x so divide both sides by 1/2 to get your answer of 20.
Whats your problem I can help you, what type of problem is it?
Answer:
1 , -3, -2
It factors into:
(x-1) (x+3) (x+2)
Step-by-step explanation:
First, we use the rational root theorem to determine any solutions of p(x). = x3 + 4x2 + x − 6
Factoring -6:
1
-1
2
-2
3
-3
6
-6
x = 1
p(1) = 1^3 + 4 * 1^2 + 1 - 6 = 6 - 6 = 0
x = 1 is a solution.
(x^3 + 4x^2 + x - 6) / (x - 1) =
x^3 / x = x^2
x^2 * (x - 1) = x^3 - x^2
x^3 + 4x^2 - x^3 + x^2 = 5x^2
5x^2 / x = 5x
5x * (x - 1) = 5x^2 - 5x
5x^2 + x - 5x^2 + 5x = 6x
6x / x = 6
6 * (x - 1) = 6x - 6
6x - 6 - 6x + 6 = 0
(x - 1) * (x^2 + 5x + 6)
x^2 + 5x + 6 factors to (x + 3) * (x + 2)
Factors:
(x - 1)
(x + 2)
(x + 3)
roots:
x = 1
x = -2
x = -3
Answer:
100+x
Step-by-step explanation:
Peter starts out with 100 dollars and then gets X more meaning we have to add X to what he originally had and that looks like this 100+x
I hope this helps and please don't hesitate to ask if there is anything still unclear!
Answer:
B. The observational study is a cross-sectional study because information is collected at a specific point in time.
Step-by-step explanation:
1) There are three types of Observational Studies: Case-control, cross-sectional and Cohort.
2) Since the researchers collected information from those 1800 adults at a certain time, then we can call it a cross-sectional study. It does not provide solid results since the research was not done over a period to collect further information. We don't know, for example, much more than what that association deeply mean.
3) If we wonder more, then the researchers would have to track those adults over a given period, i.e. a Cohort would be necessary.
4) Moreover, it's not "retrospective" for virtually every question, always makes us look back somehow, and it does not categorize a kind of observational study.