4 years ago

Is R-Z(Real numbers - integers) an open topology?

1 answer:

5 0

R−Z is a union of countable many open sets so R−ZR−Z is open
I actually didn't know that I had to look it up and got my answer from another site, oppsie doopsies

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lisabon 2012 [21]

Answer:

Initial value: 40. Rate of change: 10

Step-by-step explanation:

You start out with 40 (Initial value) and you'd add 10 (Rate of change) to it everyday.

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4 years ago

Fill in the missing coefficients of the terms in the expansion of (x + y)^9

zepelin [54]

Answer:

1, 9, 36, 84, 126, 126, 84, 36, 9, 1.

Step-by-step explanation:

Using the binomial theorem:

(x + y)^9 = x^9 + 9C1 x^8 y + 9C2 x^7y^2 + 9C3x^6y^3 + 9C4x^5y^4 + 9C5x^4y^5 +

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The coefficients are

1, 9, 36, 84, 126, 126, 84, 36, 9, 1.

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3 years ago

What is the measure of AB?

zhenek [66]

Answer:

Step-by-step explanation:

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49 + 576 = c²

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25 = c

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4 years ago

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Tcecarenko [31]

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Step-by-step explanation:

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3 years ago

What is the value of x? 6(−3−x)−2x=14 Enter your answer in the box.

Paraphin [41]

Your answer would be x=-4

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