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2 years ago

If <3 measures 123°, what is the measure of <7?

Mathematics

1 answer:

BaLLatris [955]2 years ago

3 0

Answer:

assuming <3 is supplementary to <7 then <7 is 57

Step-by-step explanation:

180-123=57

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Which value of x makes the equation 2+4(6-2x)= 8 true?

Usimov [2.4K]

Answer:

Step-by-step explanation:

2+4(6-2x)=8

2+24-8x=8

26-8x=8

26-8=8x

18/8=x

2.25=x

substitute the value of x

2+4(6-2x)

2+4(6-2*2.25)

2+6

therefore 8=8 so it is true

8 0

2 years ago

Read 2 more answers

Lan has 30 star stickers to share. she gives 4 stickers to each of her and has 2 stickers.

Aleksandr [31]

7
30/4 =7.5 so the answer is 7

3 0

2 years ago

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Which of the following is a solution of the inequality 0.75n + 1.5 < 59.25

mojhsa [17]

Answer:

b.77

Step-by-step explanation:

0.75n + 1.5 < 59.25

0.75n < 59.25 - 1.5

0.75n < 57.75

n < 57.75 / 0.75

n < 77

5 0

3 years ago

9c - 10 = 2c + 53 <br>find what is c.

NARA [144]

Answer:

c = 9

Step-by-step explanation:

9c - 10 = 2c + 53

9c =2c + 63

7c = 63

c = 9

5 0

2 years ago

Read 2 more answers

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.

5 0

2 years ago