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e-lub [12.9K]
3 years ago
10

Choose the correct simplification of the expression (−2x + 6y)(4x − 6y).

Mathematics
2 answers:
Minchanka [31]3 years ago
8 0

Answer:

-8x^2 +36xy - 36y^2

Step-by-step explanation:

(−2x + 6y)(4x − 6y)

To multiply this we use FOIL method

first we multiply -2x with 4x, it becomes -8x^2

Then multiply -2x with -6y, we get 12xy

multiply 6y with 4x, we get 24xy

multiply +6y with -6y, we get -36y^2

Now we commbine all the answers we got

-8x^2 +12xy+24xy - 36y^2

combien like terms

12xy+24xy= 36xy

-8x^2 +36xy - 36y^2

sashaice [31]3 years ago
8 0

Answer:

-8x^2+36xy-36y^2

Step-by-step explanation:

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W(x)=9x+8,evaluate w(5)
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Use the substitution method

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7 0
3 years ago
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Snezhnost [94]

Answer:

The exponential Function is 20+12h=200.

Farmer will have 200 sheep after <u>15 years</u>.

Step-by-step explanation:

Given:

Number of sheep bought = 20

Annual Rate of increase in sheep = 60%

We need to find that after how many years the farmer will have 200 sheep.

Let the number of years be 'h'

First we will find the Number of sheep increase in 1 year.

Number of sheep increase in 1 year is equal to Annual Rate of increase in sheep multiplied by Number of sheep bought and then divide by 100.

framing in equation form we get;

Number of sheep increase in 1 year = \frac{60}{100}\times20 = 12

Now we know that the number of years farmer will have 200 sheep can be calculated by Number of sheep bought plus Number of sheep increase in 1 year multiplied by number of years  is equal to 200.

Framing in equation form we get;

20+12h=200

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Subtracting both side by 20 using subtraction property we get;

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Now Dividing both side by 12 using Division property we get;

\frac{12h}{12} = \frac{180}{12}\\\\h =15

Hence Farmer will have 200 sheep after <u>15 years</u>.

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