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777dan777 [17]
3 years ago
10

Write a function with a zero of 1/2. Explain your andwer

Mathematics
2 answers:
balu736 [363]3 years ago
8 0

Answer:

f(x) = x-1/2.

Step-by-step explanation:

A number n is a zero of a function if f(n)=0. In this case, if I operate 1/2 with its additive inverse we obtain zero. So, as 1/2-1/2=0 the easiest function with 1/2 as a zero will be f(x)= x-1/2. Indeed, f(1/2)=1/2-1/2=0.

elena-s [515]3 years ago
5 0
A function with a zero in a is,

f(x)=x-a

So,


f(x)=x-1/2
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Find the probability that the person is frequently or occasionally involved in charity work.
Schach [20]
Given the table below which shows the result of a survey that asked 2,881 people whether they are involved in any type of charity work.

\begin{tabular}
{|c|c|c|c|c|c|}
 &Frequently&Occassionally&Not at all&Total\\[1ex]
Male&227&454&798&1,479\\
Female &205&450&747&1,402\\
Total&432&904&1,545&2,881
\end{tabular}

Part A:

If a person is chosen at random, the probability that the person is frequently or occassinally involved in charity work is given by

P(being \ frequently \ involved \ or \ being \ occassionally \ involved)\\ \\= \frac{432}{2881} + \frac{904}{2881} = \frac{1336}{2881}=\bold{0.464}



Part B:

If a person is chosen at random, the probability that the person is female or not involved in charity work at all is given by

P(being
 \ female \ or \ not \ being \ involved)\\ \\= 
\frac{1402}{2881} + \frac{1545}{2881}-\frac{747}{2881} = 
\frac{2200}{2881}=\bold{0.764}



Part C:

If a person is chosen at random, the probability that the person is male or frequently involved in charity work is given by

P(being
 \ male \ or \ being \ frequently \ involved)\\ \\= 
\frac{1479}{2881} + \frac{432}{2881}-\frac{227}{2881} = 
\frac{1684}{2881}=\bold{0.585}



Part D:

If a person is chosen at random, the probability that the person is female or not frequently involved in charity work is given by

P(being
 \ female \ or \ not \ being \ frequently \ involved)\\ \\= 
\frac{1402}{2881} + \frac{904}{2881} + \frac{1545}{2881}-\frac{450}{2881}-\frac{747}{2881} = 
\frac{2654}{2881}=\bold{0.921}



Part E:

The events "being female" and "being frequently involved in charity work" are not mutually exclusive because being a female does not prevent a person from being frequently involved in charity work.

Indeed from the table, there are 205 females who are frequently involved in charity work.

Therefore, the answer to the question is "No, because 205 females are frequently involved charity work".
4 0
2 years ago
Martin collected data from students about whether they played a musical instrument. The table shows his
nydimaria [60]

Answer: 90 students

Step-by-step explanation:

I got this question on my test, and the answer was 90

100% verified! :D

6 0
2 years ago
27^4–9^5 3^9 is divisible by 25
hichkok12 [17]

Answer:

  no

Step-by-step explanation:

If you mean

  27^4 - 9^5·3^9 = -1161730026

it has no factors of 5, so cannot be divisible by 25.

__

If you mean ...

  (27^4 -9^5)/3^9 = ((3^3)^4 -(3^2)^5)/3^9 = 3^10(3^2 -1)/3^9 = 3(9-1) = 24

it is not divisible by 25, either.

6 0
3 years ago
Are these two functions or no? i name brainiest
snow_tiger [21]

Answer:

these two isn't a function

Step-by-step explanation:

On the table you can see that the ratio isn't equivalent

On the chart you can see that one domain has two ranges which also tells us that this two isn't a function

3 0
3 years ago
Read 2 more answers
3х - 5 = -11 what is x
Gennadij [26K]

Answer:

-2

Step-by-step explanation:

Add 5 to both sides to get

3x-5+5=-11+5

and simplify to get

3x = -6

x = -2

7 0
3 years ago
Read 2 more answers
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