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3 years ago

What is the simplified polynomial and the value

Mathematics

1 answer:

Elanso [62]3 years ago

7 0

The simplified polynomial is; xy(x²y - xy² +1) and; the value when x=-3 and y=2 is; -186

From the polynomial given;

x²yxy -xy²xy +xy.

The polynomial can be factorised to yield a simpler form as follows;

xy(x²y - xy² +1).

This is so because, xy is a common factor.

The value is therefore;

(-3×2)((-3)²2 - (-3×2²) +1)

-6(18+12+1)

= -186

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3 years ago

a cylindrical tank with radius 7 m is being filled with water at a rate of 4 m3/min. how fast is the height of the water increas

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Answer:

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3 years ago

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tia_tia [17]

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A seven digit phone number consists of a three-digit prefix followed

Svetlanka [38]

10000 different phone numbers are possible for a particular prefix if repetion of digits is allowed

5040 different phone numbers are possible for a particular prefix if repetion of digits is not allowed

<em><u>Solution:</u></em>

Given that,

A seven digit phone number consists of a three-digit prefix followed by four digits

We have to find the different phone numbers are possible for a particular prefix

For a paricualr prefix, there are four digits

Total numbers from 0 to 9 are 10

Therefore,

Different ways for phone number for particular prefix:

If repetition is allowed:

Different ways = 10 x 10 x 10 x 10 = 10000 ways

If repetition is not allowed then:

Different ways = 10 x 9 x 8 x 7 = 5040 ways

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3 years ago