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3 years ago

This app is not even good

Mathematics

2 answers:

Mariulka [41]3 years ago

7 0

Sometimes it’s alright . It’s awful when some one robs you of points by writing a b.s answer

Leni [432]3 years ago

5 0

Answer:

nos3

Step-by-step explanation:

pero ayuda plis en mate wa

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100 POINTS IF U GET THIS RIGHT!

JulsSmile [24]

Answer:

9.2 m.

Step-by-step explanation:

6.2 m.

7.2 m.

8.2 m.

9.2 m.

4 0

2 years ago

Read 2 more answers

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:

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.

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.

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

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.

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.

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

2 years ago

What is ...1000.0000..000000km x 3,000?

aliya0001 [1]

Answer:

Step-by-step explanation:

duh

3 0

2 years ago

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How do I set up my equation?

Vaselesa [24]

I think it will be set up as 2000(.051)^3

4 0

2 years ago

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Name two angles that are adjacent to

butalik [34]

< ABE and < CBD.
Adjacent angles are two angles that have a common vertex and a common side but do not overlap.

3 0

2 years ago