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san4es73 [151]
3 years ago
14

What is the unknown fraction?

Mathematics
1 answer:
Bezzdna [24]3 years ago
5 0

Answer:

47/100

Step-by-step explanation:

we will shift the 2/10 to the other side and change the sign to minus

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A. 1.609344 km

B. 0.62137119 m

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2 years ago
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there are 700 lockers on the 6th grade hallway. three fifths of the lockers are being used. how many lockers are not being used
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Answer: 280 lockers

Step-by-step explanation:

3/5*700= 420 so 420 are being used and 700-420=280 lockers not in use

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Kelsey jog 60 feet in 6 second what is thus rate in miles per hour round to the nearest tenth
GenaCL600 [577]

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Step-by-step explanation: divide 60 by 6

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3 years ago
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3 years ago
A team of 17 softball players need to choose three players to refill the water cooler. How many different ways are there to sele
KATRIN_1 [288]
<h3>Answer: 680 different combinations</h3>

=======================================================

Explanation:

If order mattered, then we'd have 17*16*15 = 4080 different permutations. Notice how I started with 17 and counted down 1 at a a time until I had 3 slots to fill. We count down by 1 because each time we pick someone, we can't pick them again.

So we have 4080 different ways to pick 3 people if order mattered. But again order doesn't matter. All that counts is the group itself rather than the individual or how they rank. There are 3*2*1 = 6 ways to order any group of three people, which means there are 4080/6 = 680 different combinations possible.

An alternative is to use the nCr formula with n = 17 and r = 3. That formula is

_n C _r = \frac{n!}{r!*(n-r)!}

where the exclamation marks indicate factorials

5 0
3 years ago
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