1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
White raven [17]
2 years ago
13

A set W of strings of symbols is defined recursively by 1. a, b, and c belong to W. 2. If x belongs to W, so does a(x)c. Which o

f the following strings belong to W ? a. a(b)c b. a(a(b)c)c c. a(abc)c d. a(a(a(a)c)c)c e. a(aacc)c
Mathematics
1 answer:
Vadim26 [7]2 years ago
8 0

Answer:

a. a(b)c  

b. a(a(b)c)c  

d. a(a(a(a)c)c)c          

Step-by-step explanation:

We are given the following in the question:

a,b,c \in W\\\text{If } x \in W \Rightarrow a(x)c \in W

a. a(b)c

It is given b belongs to W.

b \in W\\\Rightarrow a(b)c \in W

b. a(a(b)c)c

a(b)c \in W\\\Rightarrow a(a(b)c)c \in W

c. a(abc)c

a(abc)c does not belong to W because we cannot find x in W such that a(abc)c belongs to W.

d. a(a(a(a)c)c)c

a \in W\\\Rightarrow a(a)c \in W\\\Rightarrow a(a(a)c)c \in W\\\Rightarrow a(a(a(a)c)c)c

e. a(aacc)c

a(aacc)c does not belong to W because we cannot find x in W such that a(aacc)c belongs to W.

You might be interested in
Can anyone explain to me me how long division works briefly or in detail? For 20pts?
KIM [24]
If you have 1275 ÷ 4, you write it as shown, with 1275 on the inside and 4 on the outside. then you go digit by digit and find how many times 4 goes into the number. it goes into 1 zero times, so an imaginary 0 is put in the first spot above the 1. next, 4 goes into 12 three times, so 3 is written above the 2. After that, subtract 4×3 from 12, which leaves 0, and bring down the 7. 4 goes into 7 once with a remainder of 3, so a 1 is put up top and the 5 brought down next to the three. 4 goes into 35 eight times with a remainder of 3,so 8 is written up top. the 3 is the remainder, written as R3. so your answer is 1274÷4= 318 R3.
Hope this helps.

5 0
3 years ago
How to find the length of the hypotenuse of a line segment?
MakcuM [25]

the hypotenuse may be found by using the Pythagoras theorem
6 0
3 years ago
The population of a town increases by 5 % every five years. Due to a high rate of industrialisation of
Anna11 [10]

Answer:

A

Step-by-step explanation:

Because 105%*105%=1.1205

and the only number divisible by that is A

6 0
3 years ago
Help me pleaseeeeeeeeeeeee
Elan Coil [88]
I will mark brainlist please help

Story : A Dog’s Tale by Mark Twain

1. Using a dog as narrator gives the passage a tone of —


• objectivity
• formality
• bitterness
• humor


2. What literary device is used in the sentence “She had one word which she always kept on hand, and ready, like a life-preserver”?

• Simile
• Metaphor
• Hyperbole
• Onomatopoeia

3. Based on the second paragraph, the word mastiff most likely means —

• a large dog
• a male dog
• a man’s shirt
• a part of a ship


4. According to the author, what would bring such happiness to the dogs as he describes at the end of the story?

• They helped the author’s mother find the words she used, so they especially enjoyed watching her use them.

• They knew the meaning of “supererogation” and realized they were listening to a funny joke.

• Watching and laughing as others were embarrassed vindicated their own previous embarrassment.

• They were generally happy dogs who often expressed a great deal of joy.

5. “A Dog’s Tale” uses the topic of animal communication in order to —
• show how dogs really communicate

• explain how animals learn from humans

• demonstrate that dogs are smarter than most people

• poke fun at human behavior

6. The amount of time that passes during this story is most likely —

• 10 hours

• 10 days

• 10 months

• 10 years

7. An underlying theme in this story is that —

•many people use words without knowing their meanings

• dogs know more than people realize

• family loyalty takes top priority

• strangers are almost always suspicious

8. Since the author used first person, readers are left to wonder —

• how the author felt about his mother

• how strangers reacted to his mother’s word knowledge

• what the author’s mother was thinking

• whether or not the author’s mother knew the meanings of all the words she used
6 0
3 years ago
Read 2 more answers
What is the equation if its Slope= -3/5, y-intercept =2
Oksana_A [137]

Answer:

y = -3/5x +2

Step-by-step explanation:

y = mx + b

where m is the slope and b is the y intercept

y = -3/5x + 2

3 0
2 years ago
Other questions:
  • If the coefficient of determination is 0.25 and the sum of squares residual is 180, then what is the value of SSY?
    6·1 answer
  • A person can be no taller than 6.25 feet to become an astronaut pilot for
    12·1 answer
  • Two doctors is blank percent of 25 doctors
    15·1 answer
  • If m<4 =105, what is m<7?
    14·1 answer
  • use inverse operations to solve each equation. Explain each step and identify the property used to reach step.
    5·1 answer
  • a car travels at an average speed of 52 miles per hour how many miles does it travel in 3 hours and 15 minutes​
    12·1 answer
  • Solve for x and y (copy and paste as needed)
    6·1 answer
  • A computer gererates 80 integers from 1 to 5 at random. The results are recrded in the table. What is the experimental probabili
    12·1 answer
  • What is the missing number? <br> URGENT PLS HELPP
    5·2 answers
  • Divide.<br><br> 53.4 ÷ 6<br><br> 0.89<br> 8.90<br> 89.00<br> 890.00
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!