3 years ago

Help me with number 3 please

Mathematics

2 answers:

storchak [24]3 years ago

7 0

3x+2? I hope this is the right answer...

ratelena [41]3 years ago

6 0

3(n+2) ← algebraic expression

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Prove each statement that is true and ﬁnd a counterexample for each statement that is false. Assume all sets are subsets of a un

tekilochka [14]

Answer with Step-by-step explanation:

We are given that A, B and C are subsets of universal set U.

We have to prove that

$A\cap (B-C)=(A\cap B)-(A\cap C)$

Proof:

Let x $\in A\cap (B-C)$

Then $x\in A$ and $x\in(B-C)$

When $x\in ( B-C)$ then $x\in B$ but $x\notin C$

Therefore, $x\in( A\cap B)$ but $x\notin (A\cap C)$

Hence, it is true.

Conversely , Let $x\in(A\cap B)$ but $x\notin(A\cap C)$

Then $x\in A$ and $x\in B$

When $x\notin ( A\cap C)$ then $x\notin C$

Therefor, $x\in A\cap (B-C)$

Hence, the statement is true.

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2 years ago

How do you decompose 7

shtirl [24]

I thinkkkkk that you have to see what 2 #'s equal 7??

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3 years ago

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PLEASE HELP!! what is the arrow pointing to? (l CHECK THE PHOTO

evablogger [386]

Answer:

3.7

Step-by-step explanation:

each tick represents .1 unit

7 0

3 years ago

This is the one!!!!!!!!!!!

sukhopar [10]

All you have to do is move the denominator on the other side, by multiplying.

a-10
------- = -9
20

multiply 20 x -9
= -180

then it becomes a-10=-180
+10 +10
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3 years ago

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Damm [24]

The answer should be D. 11?

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2 years ago

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