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
Westkost [7]
3 years ago
11

 Please Help!!!

Mathematics
1 answer:
Alexandra [31]3 years ago
4 0
The answer is 1.715 hope I helped
You might be interested in
What is 4,000,000 + 700,000 + 20,000 + 9,000 + 600 + 60 + 2 in standard form?
Ivanshal [37]

Answer:

4729662

Step-by-step explanation:

5 0
3 years ago
Let A be a set of numbers.
LUCKY_DIMON [66]

Answer:

a. closed under addition and multiplication

b. not closed under addition but closed under multiplication.

c. not closed under addition and multiplication

d. closed under addition and multiplication

e. not closed under addition but closed under multiplication

Step-by-step explanation:

a.

Let A be a set of all integers divisible by 5.

Let x,y∈A such that x=5m\,,\,y=5n

Find x+y,xy

x+y=5m+5n=5(m+n)

So, x+y is divisible by 5.

xy=(5m)(5n)=25mn=5(5mn)

So,

xy is divisible by 5.

Therefore, A is closed under addition and multiplication.

b.

Let  A = { 2n +1 | n ∈ Z}

Let x,y∈A such that x=2m+1\,,\,y=2n+1 where m, n ∈ Z.

Find x+y,xy

x+y=2m+1+2n+1=2m+2n+2=2(m+n+1)

So,

x+y ∉ A

xy=(2m+1)(2n+1)=4mn+2m+2n+1=2(2mn+m+n)+1

So,

xy∈ A

Therefore, A is not closed under addition but A is closed under multiplication.

c.

Let A=\{2,5,8,11,14,...\}

Let x=2,y=5 but x+y=2+5=7∉A

Also,

xy=2(5)=10∉A

Therefore, A is not closed under addition and multiplication.

d.

Let A = { 17n: n∈Z}

Let x,y ∈ A such that x=17n,y=17m

Find x + y and xy

x+y=17n+17m=17(n+m)

xy=(17m)(17n)=289mn=17(17mn)

So,

x+y,xy ∈ A

Therefore, A is closed under addition and multiplication.

e.

Let A be the set of nonzero real numbers.

Let x,y ∈ A such that x=-1,y=1

Find x + y

x+y=-1+1=0

So,

x+y ∈ A

Also, if x and y are two nonzero real numbers then xy is also a non-zero real number.

Therefore, A is not closed under addition but A is closed under multiplication.

4 0
3 years ago
Tina’s bedroom is in the shape of a rectangular prism 15 feet long, 12 feet wide, and 10 feet high. It has no windows. Tina want
Tanya [424]

Answer:

720ft²

Step-by-step explanation:

Wall 1&2 = lh = 15*10=150

Wall 3&4 = wh = 12*10=120

Ceiling = lw = 12*15=180

120+150+120+150+180=720ft²

7 0
3 years ago
AHHHH i hate study island i can't figure this one out either, please help if you can.
aliya0001 [1]

Answer:

It's A

hope this helps


6 0
3 years ago
Read 2 more answers
Multiply 42 by the sum of 4 and r. I need help on number 10 please.
KIM [24]

Answer:

42(4 + r) is the answer if I'm reading that correctly.

5 0
3 years ago
Other questions:
  • Write down a division with an answer of 0.713
    14·1 answer
  • IM BORED!!!!! what is 5400 divided by 37000​
    8·2 answers
  • According to Confucianism, what is the government’s most important role in society?
    15·2 answers
  • Consider two populations for which μ1 = 31, σ1 = 3, μ2 = 29, and σ2 = 2. Suppose that two independent random samples of sizes n1
    8·1 answer
  • (05.01)Sammy is trying to determine how many triangles she can create out of a square grid that has a side of 14 inches. Use the
    14·1 answer
  • Morgan is going to a carnival that has games and rides. Each game costs $2.50 and each ride costs $4.25. How much would Morgan h
    8·2 answers
  • Julie is drawing a map of the town. She knows that City Hall is 3 miles
    15·1 answer
  • H(x)=2x;find h(7) please help​
    8·2 answers
  • Question 2<br> Solve by substitution.<br> 2x – 10y = 14<br> 2x + 6y = -2
    7·1 answer
  • Solve pls brainliest
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!