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aev [14]
3 years ago
9

Manuel has 6 CDs that he is going to give away. He lets his best friend choose 3 of the 6 CDs. How many different groups of 3 CD

s are possible?
Mathematics
1 answer:
levacccp [35]3 years ago
5 0

Answer:

20 groups

Step-by-step explanation:

The number of different groups possible to choose from would be the combination because order doesn't matter.

Ways of choosing r things from n total things in combination is given by:

nCr = \frac{n!}{(n-r)!*r!}

Where

n ! = n * (n-1) * (n-2) * ....

So here we use

n = 6

r = 3

substituting in formula we get:

nCr = \frac{n!}{(n-r)!*r!}\\6C3 = \frac{6!}{(6-3)!*3!}\\6C3=\frac{6*5*4*3!}{3!*3*2*1}\\6C3=5*4=20

So, 20 groups are possible

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NARA [144]

Opposite value would be either changing from a positive to a negative or from a negative to a positive.

Absolute value is always a positive value

A) 7.2, -7.2, 7.2

B) -3.5, 3.5, 3.5

C) 5 1/2, -5 1/2, 5 1/2

7 0
3 years ago
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Give the values of a, b, and c needed to write the equation's general form.<br>1/4x^2+5=0
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Let's solve your equation step-by-step.

\frac{1}{4} x^2+5=0

For this equation: a=0.25, b=0, c=5

0.25x^2 + 0x + 5 = 0

Step 1: Use quadratic formula with a=0.25, b=0, c=5.

x = \frac{-b ± \sqrt{b^2 - 4ac} }{2a}

x = \frac{-(0) ± \sqrt{(0)^2 -4 (0.25) (5)  } }{2(0.25)}

x = \frac{0 ± \sqrt{-5} }{0.5}

Answer : No Real Solutions.

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If this helped you, could you maybe give brainliest..?

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5 0
3 years ago
Raise g to the 7th power, multiply the result by 4, then subtract f from what you have
WINSTONCH [101]

Answer:

f - 4(g^7)

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7 0
2 years ago
The two-way table shows the number of people whose hobbies are reading or solving puzzles and who either ride a motorcycle or do
enot [183]

The number of people whose hobby is reading but not riding a motorcycle is 5.

<h3>What is the relative frequency of not riding a motorcycle?</h3>

We want to calculate the number of people whose hobby is reading but they don't like riding the motorcycle,

therefore, when we look into the table we will find out that block A2 is the block that represents the number of people whose hobby is reading but not riding a motorcycle.

Hence, the number of people whose hobby is reading but not riding a motorcycle is 5.

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7 0
2 years ago
I don't know how to do this​
Gre4nikov [31]

Answer:

x = -11/5 and y = 24/5

Step-by-step explanation:

Use elimination.

First, we need to multiply so that at least one variable can cancel out.

We can multiply the top equation by 2.

So we get

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Then, we can use elimination.

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2 years ago
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