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Maslowich
3 years ago
8

Three friends arrive at a party their arrival increases the number of people at the party by 20% in total how many people are no

w at the party
Mathematics
1 answer:
rodikova [14]3 years ago
5 0

Answer:

18 people

Step-by-step explanation:

Let the number of people at the party before the arrival be x

20% of x = 3

20/100 * x = 3

20x = 300

x = 300/20

x = 15

Adding the friends , we have 15 + 3 = 18

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Arun has captured many yellow-spotted salamanders. He weights each and then counts the number of yellow spots on its back
vichka [17]

Answer:

B

Step-by-step explanation:

This is a positive anotation.

Hope this helps have a good day!

7 0
3 years ago
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The time of a pendulum varies as the square root of its length. If the length if a pendulum which beats 15seconds is 9cm, find t
8090 [49]

Answer:

length= 3.7 ft.

Step-by-step explanation:

T= (square root of length) * k

1.8 seconds = (square root of 3) * k

k= 1.8 seconds / (square root of 3)

a.) T= (square root of 11) k

substituting k:

T=(square root of 11) * 1.8 seconds / (square of 3)

T= 3.4 seconds

b.) 2 seconds = (square root of length) k

substituting k:

2 seconds =(square root of length) 1.8 seconds / (square root of 3)

Divide the equation by 1.8 seconds / (square root of 3):

2 seconds / [1.8 seconds / (square root of 3)] = (square root of length)

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square both sides:

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Hope this helps.

7 0
3 years ago
What do you add to 2 5/8 to make it 6 ?
jonny [76]
To solve this, I first converted 2 5/8 into an improper fraction (2 × 8 = 16, 16 + 5 = 21) and got 21/8.
Next, you need to find the number that, when divided by 8, equals 6, and you can do this simply by multiplying 8 and 6 together to get 48.
We only have 21, so we next do 48 - 21 = 27.

Now we know that our answer is 27/8, but if you would like it as a mixed number then you just do 27 ÷ 8 = 3 (remainder 3), so as a mixed number your answer is 3 3/8.

I hope this helps!
5 0
3 years ago
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A telemarketing company had a loss of $2113.15 in July, a loss of $597.11 in August, and a profit of
bixtya [17]
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5 0
3 years ago
Combine like terms -2xy+2xy+3xy
liberstina [14]

Answer:

3xy

Step-by-step explanation:

These terms are all like terms so you can add:

-2xy + 2xy = <em>0xy</em>

Now add 3xy + 0xy: 3xy

3 0
3 years ago
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