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2 years ago

What is the product of -3y²(-4y³+y-9)

Mathematics

1 answer:

ddd [48]2 years ago

7 0

Answer:

-3y²(-4y³+y-9)

-9y(-63y-9)

567y-81y

4 8 6 y

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Scott reads 63 chapters of a book in 7 hours.<br> What is his rate in chapters per hour?

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Answer: Scott reads 9 chapters per hour.

Step-by-step explanation:

63/7 = 9

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2 years ago

Prove that an = 4^n + 2(-1)^nis the solution to

olga nikolaevna [1]

Answer:

See proof below

Step-by-step explanation:

We have to verify that if we substitute $a_n=4^n+2(-1)^n$ in the equation $a_n=3a_{n-1}+4a_{n-2}$ the equality is true.

Let's substitute first in the right hand side:

$3a_{n-1}+4a_{n-2}=3(4^{n-1}+2(-1)^{n-1})+4(4^{n-2}+2(-1)^{n-2})$

Now we use the distributive laws. Also, note that $(-1)^{n-1}=\frac{1}{-1}(-1)^n=(-1)(-1)^{n}$ (this also works when the power is n-2).

$=3(4^{n-1})+6(-1)^{n-1}+4(4^{n-2})+8(-1)^{n-2}$

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3 years ago

The class is 60% women and 10% of the women have blond hair, so blond women comprise 60% × 10% = 6% of the class.

Tatiana [17]

Answer:

Conversion and substitution

Step-by-step explanation:

One way to find out if the expression is true, we can convert all the percentages into their decimal equivalence.

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Now let's substitute the values.

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0.06 = 0.06

Since 0.06 is equal 0.06, this then proves that it is true.

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3 years ago

What is the product of -3y²(-4y³+y-9)​

What is the product of -3y²(-4y³+y-9)