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Usimov [2.4K]
3 years ago
9

Help! Please. I don’t know what I did wrong.

Mathematics
1 answer:
Debora [2.8K]3 years ago
6 0

Answer:

1320, permutation

Step-by-step explanation:

There are 12 members

Pick a president

We have 12 choices

Now there are 11 people left to pick from

now pick a vp

We have 11 choices

Now there are 10 people left to pick from

now pick a secretary

We have 10 choices

12*11*10 = 1320

This is a permutation since it matters who is president, vp and secretary

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Maitri and Aabhas do a work in 12 hours.
tamaranim1 [39]

Answer:

See below ~

Step-by-step explanation:

<u>Given</u>

  • Maitri and Aabhas do a work in 12 hours
  • Aabhas and Kavya do the work in 15 hours
  • Kavya and Maitri do the work in 20 hours

<u>Solving</u>

  • Take Maitri, Aabhas, and Kavya to be x, y, z respectively
  • <u>x + y = 12</u> (1)
  • <u>y + z = 15</u> (2)
  • <u>x + z = 20</u> (3)

<u>Take Equation 1 and rewrite it so that it is equal to x.</u>

  • x = 12 - y

<u>Take Equation 2 and rewrite it so that it is equal to z.</u>

  • z = 15 - y

<u>Now, substitute these values in Equation 3.</u>

  • x + z = 20
  • 12 - y + 15 - y = 20
  • -2y + 27 = 20
  • 2y = 7
  • y = 7/2 = <u>3.5 hours [Aabhas]</u>

<u></u>

<u>Substitute the value of y in Equation 1.</u>

  • x + 3.5 = 12
  • x = <u>8.5 hours [Maitri]</u>

<u>Substitute the value of y in Equation 2.</u>

  • 3.5 + z = 15
  • z = <u>11.5 hours [Kavya]</u>

<u></u>

<u>Add the values of x, y, and z together.</u>

  • x + y + z
  • 8.5 + 3.5 + 11.5
  • 12 + 11.5
  • <u>23.5 hours [together]</u>

8 0
2 years ago
You order office supplies for your company every quarter. The invoices for the first three quarters are $615, $791, and $803. Wh
guapka [62]

Answer:

$2209

Step-by-step explanation:

Add all three numbers together

4 0
3 years ago
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Dominic bought a new alarm clock that was on sale for $18.75. If this price represents a 30% discount from the original price, w
Orlov [11]
P - 0.30= $18.75


18.75 + 0.30 = p


$19.05 = p


6 0
3 years ago
Give two of your own examples of square roots that are irrational numbers and two rational numbers .
Vikentia [17]

Irrational

\sqrt{2}

\sqrt{3}

Rational:

\sqrt{1}

\sqrt{4}


6 0
3 years ago
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HELP PLEASE SUPER QUICK, I'LL MARK AS BRAINLIEST!
olganol [36]

Answer:

More expensive: Miami, Honolulu

Less expensive: Seattle, Orlando

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