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sveta [45]
3 years ago
13

The code for a lock consists of 3 digits using the digits: 1,2,4,7,8,9. How many different codes are possible if no digit may be

repeated?
Mathematics
1 answer:
hodyreva [135]3 years ago
8 0

Answer:

279

Step-by-step explanation:

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Mary can paint a house by herself in 12 hours. john can paint a house by himself in 16 hours. how long would it take them to pai
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1/12+1/16=1/n
4/48+3/48=1/n
7/48=1/n
48=7n
n=48/7 hours to paint the house if they worked together
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5 0
3 years ago
Evaluate
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Answer:

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Step-by-step explanation:


6 0
3 years ago
Allison has 5 times as many baseball cards as football cards in al,she has 120 baseball and football cards. How many baseball ca
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Allison has 94 baseball cards.
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3 years ago
Compute each sum below. If applicable, write your answer as a fraction.
Alex777 [14]

Answer:

First equation is -425

Second equation is 11.25

Step-by-step explanation:

First equation we can write as

\sum_{i=0}^7 5 \times (-2)^i

computing

When i=0 -> 5 \times (-2)^0 =5

When i=1 -> 5 \times (-2)^1 = -10

...

When i=7 -> 5 \times (-2)^7 = --640

then replacing each term we have

5  + (-10) + ( 20) + ( -40) +  (80) +( -160) +   320 + (-640) = -425

For the second equation we'll have 9 terms, solving in a similar fashion

When i=1 -> \frac{1}{4}1=0.25

When i=2 -> \frac{1}{4}2=0.50

When i=3 -> \frac{1}{4}3=0.75

...

When i=9 -> \frac{1}{4}9=2.25

So we have 0.25 + 0.50 + 0.75 + 1.00 + 1.25 + 1.50+ 1.75 +2.00 +2.25

4 0
3 years ago
Suppose the amount of chickens varies directly with the pounds of corn needed. Billy
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Answer:

83904984098140984019258070271

Step-by-step explanation:

The chickens be hungry doe.

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2 years ago
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