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aev [14]
2 years ago
9

2. 1

Mathematics
1 answer:
prohojiy [21]2 years ago
4 0

Answer:

Step-by-step explanation:

2.1 = A - 33 [Solve for A]

+ 33 .     + 33

35.1 = A

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Answer:

Step-by-step explanation:

Hint:  1- 2sin²x = Cos 2x

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7 0
3 years ago
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Keiko has seven colors of lanyard. She uses three different colors to make a keychain. How many different combinations can she c
AleksAgata [21]
Combination = doesn't matter what order
Permutation = order matters

There are <u>two</u> methods to work out combinations.

Method 1 List out possibilities
123 124 125 126 127 134 135 136 137 145 146 147 156 157 167
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345 346 347 356 357 367
456 457 467
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Method 2 Use a formula.
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\frac{n!}{r!(n-r)!} = \frac{7!}{3!(7-3)!} = \frac{7!}{3!*4!} = \frac{7*6*5*4*3*2*1}{3*2*1*4*3*2*1} = \frac{7*6*5}{3*2*1}=\frac{210}6=35

(n is the number of choices, r is the amount you choose, and ! is a function that multiplies together all numbers down to 1)


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3 years ago
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Answer:

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4 0
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Marrrta [24]
37.6  - 25.49 =

12.11

now i round

12.10



5 0
3 years ago
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