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polet [3.4K]
3 years ago
10

Allison is evaluating the expression -5-(-2) using integer tiles. She begins with 5 negative tiles as shown

Mathematics
2 answers:
elena-s [515]3 years ago
5 0

Answer:

its B. -3

Step-by-step explanation:

Remove 3 negative tiles .

Can I get brainliest??????

FromTheMoon [43]3 years ago
3 0

Answer:

Remove 3 negative tiles

Step-by-step explanation:

Edge 2020

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What is the value of the expression?
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Please help.
Leona [35]

Answer:

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Step-by-step explanation:

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3 years ago
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The coefficient of x^ky^n-k in the expansion of (x+y)^n equals (nk). True or false.
AVprozaik [17]

Answer:

The correct option is;

False

Step-by-step explanation:

The coefficient of x^k·y^(n-k) is nk,   False

The kth coefficient of the binomial expansion, (x + y)ⁿ is  \dbinom{n}{k} = \dfrac{n!}{k!\cdot (n-k)!} = C(n,k)

Where;

k = r - 1

r = The term in the series

For an example the expansion of (x + y)⁵, we have;

(x + y)⁵ = x⁵ + 5·x⁴·y + 10·x³·y² + 10·x²·y³ + 5·x·y⁴ + y⁵

The third term, (k = 3) coefficient is 10 while n×k = 3×5 = 15

Therefore, the coefficient of x^k·y^(n-k) for the expansion  (x + y)ⁿ = C(n,k) not nk

7 0
2 years ago
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