Answer:
12/5
Step-by-step explanation:
Tan D = opp/adj = EF/DE = 12/5
Answer:
The quotient is -3
Step-by-step explanation:
we have
![\frac{a-3}{7}:\frac{3-a}{21}](https://tex.z-dn.net/?f=%5Cfrac%7Ba-3%7D%7B7%7D%3A%5Cfrac%7B3-a%7D%7B21%7D)
Multiply in cross
![\frac{(a-3)21}{(3-a)7}](https://tex.z-dn.net/?f=%5Cfrac%7B%28a-3%2921%7D%7B%283-a%297%7D)
Simplify
Remember that
![\frac{21}{7}=3](https://tex.z-dn.net/?f=%5Cfrac%7B21%7D%7B7%7D%3D3)
substitute
![\frac{(a-3)3}{(3-a)}](https://tex.z-dn.net/?f=%5Cfrac%7B%28a-3%293%7D%7B%283-a%29%7D)
we know that
![(3-a)=-(a-3)](https://tex.z-dn.net/?f=%283-a%29%3D-%28a-3%29)
substitute
![\frac{(a-3)3}{-(a-3)}=-3](https://tex.z-dn.net/?f=%5Cfrac%7B%28a-3%293%7D%7B-%28a-3%29%7D%3D-3)
solution:
a) The population of interest is all the adults
b) The parameter of interest is p, the proportion of adults who own a cell phone
c) The statistic is the proportion, p^, of the sample of 1572 adults who own a cell phone. The value of the sample proportion is 0.83.
d) We dont the the exact proportion with 100 % but we know that the proportion would lie in a certain range with certain degree of confidence
Answer:
-1 / 3y²
Step-by-step explanation: