2 years ago

Erin wants to purchase 3 CDs for $10 each. How much moneydoes she need?

Mathematics

2 answers:

Aloiza [94]2 years ago

7 0

Answer: 30

Step-by-step explanation:

8090 [49]2 years ago

6 0

Answer:

Step-by-step explanation:

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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\\
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----------------------------------------------------

$\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\\\\
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2 years ago

The point (-6, 4) is reflected over the x-axis. What is the new point?

alexira [117]

Answer:

(-6,-4)

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A reflection over the x-axis changes the y variable

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2 years ago

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2 years ago

Erin wants to purchase 3 CDs for $10 each. How much moneydoes she need?​

Erin wants to purchase 3 CDs for $10 each. How much moneydoes she need?