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Aleks [24]
3 years ago
5

In a set of dominoes, each piece is marked with two numbers, one on each end. the pieces are symmetrical so that the two numbers

are unordered. that is, the combination (2, 6) and (6, 2) are not distinguishable. how many pieces can be formed using the numbers 1, 2, ... , 12?
Mathematics
1 answer:
ki77a [65]3 years ago
8 0

That would be the number of combinations of of 2 from 12 + the number of doubles ( 1 and 1 , 2 and 2 and so on).

= 12C2 + 12

= (12*11)/ 2 + 12

= 66 + 12 = 78 Answer

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A television normally sells for $320 this week it’s on sale for 60% off the normal price what is the price of the sale
stira [4]

Answer:

128 dollars

Step-by-step explanation:

You would multiply 60 (that's the percentage off) by 320 ( the price of the T.V) and then subtract the answer you got from multiplying the two from the original price of the T.v (320)

Hope this helps

6 0
3 years ago
Jonathan fills 2/5 of a toffe box in 15 seconds. How many boxes can he fill in 10 minutes?
Zina [86]

Answer:

16 boxes in 10 minutes

Step-by-step explanation:

2/5 = 15 sec

15 ÷ 2=7.5              1/5 = 7.5 seconds

7.5 × 5 = 37.5            37.5 = 1 box

60 × 10 = 600 secs

600 ÷ 37.5 = 16

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8 0
3 years ago
What is the present value of $6,000 to be received at the end of each of eight periods, assuming the first payment occurs at the
Kipish [7]

Answer: Present value = $7200

Step-by-step explanation: Given Principal that is the original amount is $6000

Rate is 10% every fourth year

But the total period is eight.

So the interest would be paid 8/4 = 2 times.

Therefore,

Simple interest

= {principal * rate * no of times}/100

= {$6000*10*2}/100

Simple interest = $1200

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= $6000 + $1200

= $7200.

6 0
3 years ago
Help help help math please last one be honest
nadya68 [22]

Answer:

122 degrees

Step-by-step explanation:

The two intersecting lines are parallel for this problem, which means that the angle next to angle3 is the same degree measure as the one that is 58 degrees.

Also, remember that two angles next to each other on a straight line are supplementary, meaning that they add to 180 degrees.

When keeping these two things in mind, you can solve like this:

180 = angle3 + 58

180 - 58 = angle3

angle3 = 122

122 degrees

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2 years ago
What is the greatest common factor of 60w,36w^2 ,24w^4
MatroZZZ [7]
The greatest common factor is 12w
7 0
3 years ago
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