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miss Akunina [59]

4 years ago

10

How to rewrite division expression in unit form?

1 answer:

Oksanka [162]4 years ago

3 0

Take the division problem, and get the decimal answer, using a calculator, for example, 5 meters in 20 seconds, 5/20 is .25, so the unit form in this example would be .25 meters per second, dont forget the per, a unit expression basicly is the same ratio as the division problem but having a one on the right side, like in my example, .25 meters per 1 second

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Simplify 19xy + 6x^2 +2xy step by step

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3 years ago

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ale4655 [162]

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Step-by-step explanation:

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5 0

4 years ago

Read 2 more answers

Square the following general examples to determine the general rule for squaring a binomial:

gayaneshka [121]

Answer:

See explanation below.

Step-by-step explanation:

For part a we have the following expression:

$(a+b)^2 = a^2 +2ab + b^2$

And for part b we got:

$(a-b)^2 = a^2 -2ab +b^2$

On general we have the following formula:

$(a+b)^n =\sum_{k=0}^n (nCk) a^{n-k} b^k$

We see that if n=2 we have this:

$(a+b)^2 =\sum_{k=0}^2 (2Ck) a^{2-k} b^k$

$(a+b)^2 = (2C0) a^2 b^0 + (2C1)a^{2-1} b^1 + (2C2) a^{2-2} b^2$

$(a+b)^2 = a^2 +2ab + b^2$

And for the other possibility we have:

$(a+b)^n =\sum_{k=0}^n (-1)^k (nCk) a^{n-k} b^k$

We see that if n=2 we have this:

$(a+b)^2 =\sum_{k=0}^2 (2Ck) a^{2-k} b^k$

$(a+b)^2 = (-1)^0 (2C0) a^2 b^0 +(-1)^1 (2C1)a^{2-1} b^1 + (-1)^2 (2C2) a^{2-2} b^2$

$(a+b)^2 = a^2 +2ab + b^2$

So then we have the general expression for any binomial term elevated at any power.

7 0

3 years ago