3 years ago

What is the first step for multiplying decimal numbers?

Mathematics

1 answer:

dimulka [17.4K]3 years ago

4 0

Read the question correctly

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3 years ago

Please help with this worksheet real numbers

Rufina [12.5K]

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3 years ago

I have to write the slope and equation of each line pictured in y = mx + b form.

Brut [27]

Answer:

y=7/3x+8

Step-by-step explanation:

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3 years ago

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Pavel [41]

Answer:

$2a$

$-5x^{2}$

Step-by-step explanation:

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3 years ago

In the equation (x^2+y)^5, what is the coefficient of the term x^4y^3? what is the coefficient of the same term in the expansion

lys-0071 [83]

$\displaystyle
(x+y)^n=\sum_{k=0}^n\binom{n}{k}x^{n-k}y^k$

-------------------------------------------------------------

$\displaystyle
(x^2+y)^n=\sum_{k=0}^n\binom{n}{k}x^{2n-2k}y^k\\
n=5\\
k=3\\\\\binom{5}{3}=\dfrac{5!}{3!2!}=\dfrac{4\cdor5}{2}=10$

It's 10.

----------------------------------------------------

$\displaystyle
(3x^2+y)^n=\sum_{k=0}^n\binom{n}{k}(3x)^{2n-2k}y^k=\sum_{k=0}^n\binom{n}{k}\cdot 3^{2n-2k}\cdot x^{2n-2k}y^k\\\\
n=5\\
k=4\\\\
\binom{5}{3}\cdot3^{2\cdot5-2\cdot4}=10\cdot3^{2}=10\cdot9=90$

It's 90

6 0

3 years ago