3 years ago

How do you common factor 9y-9?

Mathematics

1 answer:

Tatiana [17]3 years ago

8 0

Y=-1
........
you have to divide each side by 9

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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

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

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2 years ago

A teacher has 40 learners in her class. She chooses 1% to clean her board. Is this possible?

worty [1.4K]

Step-by-step explanation:

No, 1% of 40 is the same as 40% of 1. Which is 0.025% You cant have 0.025% of a learner or a human so this isn't possible.

7 0

2 years ago

I need the written form for 293,805

yan [13]

Two hundred ninety three thousand eight hundred and five

5 0

3 years ago

Please help me with this geometry question. x and pr needed ao basically like this x=(answer), PR=(answer). Thank you

Dennis_Churaev [7]

Answer:

x = -1, PR = 38.

Step-by-step explanation:

As Q is the midpoint of PR

PQ = QR

6x + 25 = 16 - 3x

9x = -9

x = -1.

= 6x + 25 + 16 - 3x

= 6(-1) + 25 + 16 - 3(-1)

= -6 + 25 + 16 + 3

= 38.

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2 years ago

Jon: 4b-1= -4+ 4b +3<br> is this no solution

anygoal [31]

Answer:

b=0

Step-by-step explanation:

4b-1=-4+4b+3

4b-4b=-4+3+1

b=0

5 0

2 years ago