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3 years ago

What is 2-2+4? This is on my test and I am actually losing my mind lol

Mathematics

2 answers:

irina [24]3 years ago

5 0

Answer:

Step-by-step explanation:

what this is so easy what's good with your mental health

Scorpion4ik [409]3 years ago

5 0

Answer: its 4 my guy

Step-by-step explanation:

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mrs papica bought 20 cupcakes for her class. one-half of them have chocolate frosting and one-fourth of them have vanilla frosti

Jobisdone [24]

Chocolate- 20×.5= 10 Vanilla-20×.25=5 Strawberry- 20×.25=5 10+5+5=20

8 0

4 years ago

Can some please help me with this problem?

grin007 [14]

Answer:

Step-by-step explanation:

its a negative slope, so you can eliminate c and d. even though the scale is 2, the slope always pertains to $1 increase and not $2 increase.

6 0

3 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

3 years ago

¿A cuantos habitantes equivale él numero .38 en la población de Brasil?

LekaFEV [45]

Podria ser cierto......

7 0

3 years ago

Please helppp Which ordered pairs lie on the line shown in the graph?

Delvig [45]

Answer:

I think a option is correct

Step-by-step explanation:

because they are point on the graph

4 0

3 years ago

Read 2 more answers