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3 years ago

PLEASE HELP ASAP

Mathematics

1 answer:

Viktor [21]3 years ago

4 0

Answer:

No cheating: you’re starring in a movie w/ the last person saved in your camera roll and the last song you listened to is the title.

"let's go everywhere" the movie with taemin and taeyong sounds like something i would watch ♡ https://t.co/tGdUt7CKPc

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Explain whether the following given sets are closed under addition:

Ivan

Answer:

Step-by-step explanation:

a) Yes.

$\forall\ a,b\ \in\ B,\ a+b\in B\ (since\ 0+0=0)$

b) Yes

$W=\{0,1,2,3,..,\}\ (whole\ numbers)\\\forall\ a,b\ \in\ 3W,\ a+b\in 3W\\since:\\a\ \in\ 3W \Longrightarrow\ \exists\ k_1\in W | a=3*k_1\\\\b\ \in\ 3W \Longrightarrow\ \exists\ k_2\in W | b=3*k_2\\\\a+b=3*k_1+3*k_2=3*(k_1+k_2) \in 3W\\$

c) Yes

$\forall n\ \in\ \mathbb{N}: \Longrightarrow\ n+1 \in\ \mathbb{N}\\$

d) No

$3\in V , 3+3=6\notin V\\$

7 0

3 years ago

The points with coordinates (x, -1), (2,2), and (4,3) lie on the same line. What is the value of x?

borishaifa [10]

Find the slope of the line passing throught the points (2, 2) and (4, 3).

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

Substitute:

$m=\dfrac{3-2}{4-2}=\dfrac{1}{2}$

If the point (x, -1) lie on the same line, then the slope of line passing through the points (2, 2) and (x, -1) the same:

Substitute:

$m=\dfrac{-1-2}{x-2}=\dfrac{-3}{x-2}$

We have the equation:

$\dfrac{-3}{x-2}=\dfrac{1}{2}$ <em>cross multiply</em>

$(1)(x-2)=(-3)(2)$

$x-2=-6$ <em>add 2 to both sides</em>

$x=-4$

<h3>Answer: x = -4.</h3>

7 0

3 years ago

128 ounces is how many pounds

LiRa [457]

Answer:

An ounce is a unit of weight equal to 1/16th of a pound or about 28.35 grams.

A pound is a unit of weight commonly used in the United States and the British commonwealths. A pound is defined as exactly 0.45359237 kilograms.

Step-by-step explanation:

128 Ounces =

8 Pounds

6 0

3 years ago

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Two whole numbers have a least common multiple of 30.

Makovka662 [10]

Yes it is 3, and 10 : )

3 0

2 years ago

Simplify the expression m-6n-3/m-13n-1

rosijanka [135]

ANSWER: 7n-2

m-6n-3/m-13n-1

First you cross cancel m

then you get -6n-3/-13n-1

Thn you would subtract : 7n-2

3 0

3 years ago

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