How to solve (x+1)(50-x/2) +2

The Pew Research Center finds that the demographic make-up of political parties is changing drastically through the election cyc

patriot [66]

Answer:

(a)0.34

(b)0.5

(c)0.185

(d)0.544

(e)0.655

(f)Not disjoint events

(g)Independent events

Step-by-step explanation:

The summary of education levels among party lines is given in the table below

$\left|\begin{array}{c|ccc}&$Democrat &$Republican &$Total\\--&--&--&--\\$College Degree &37 &31 &68\\$No College Degree& 63 &69 &132\\--&--&--&--\\$Total &100 &100& 200\end{array}\right|$

(a)Probability a randomly selected participant has a college degree.

The probability a randomly selected participant has a college degree is:

$=\dfrac{68}{200} =0.34$

(b)The probability that a randomly selected participant is a democrat.

$=\dfrac{100}{200} =0.5$

(c)The probability that a randomly selected participant is a democrat and has a college degree.

$=\dfrac{37}{200} =0.185$

(d)Probability of being a democrat given that the participant has a college degree.

$=\dfrac{37}{68} \approx 0.544$

(e)The probability of begin a democrat or having a college degree

Number of Democrats =100

Number of Those with College degrees = 68

Number of democrats with College degrees =37

Therefore:

Probability of begin a democrat or having a college degree

$=\dfrac{100+68-37}{200} \\=\dfrac{131}{200}\\\\=0.655$

(f)The event of having a college degree and being a democrat are not disjoint events as there are some democrats who have a college degree.

(g)The event of having a college degree and being a democrat are independent events as the outcome of one does not affect the other.

6 0

3 years ago

Buddy ran the same distance each day for 5 days.

bagirrra123 [75]

Answer:

A.

One expression you can do is the total amount of distance Buddy runs in a 5 day period, as a function of the amount of miles he runs in a day.

d(x) = y = 5x

d(x) being total amount of miles buddy runs in 5 days. x being the amount of miles he runs in a day.

B.

Now if he ran 10 miles a day, just substitute 10 for x.

d(10) = y = 5(10) = 50

8 0

3 years ago

Question 35 of 49

Nady [450]

Answer:

D.lines that lie in the same plane but will never intersect

Step-by-step explanation:

parallel lie in the same plane but never meet

7 0

3 years ago

Through: (2, 3), parallel to y = 4x + 5

cestrela7 [59]

This is my answer with parallel slope equal 4
Use y-y1 = m(x-x1)

5 0

3 years ago

A tank contains 150 liters of fluid in which 20 grams of salt is dissolved. Brine containing 1 gram of salt per liter is then pu

Over [174]

Answer:

the number A(t) of grams of salt in the tank at a time is <em>A(t)=150-110e-t/50</em>

6 0

3 years ago