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Paladinen [302]
3 years ago
6

Please answer the questions 20 points

Mathematics
1 answer:
raketka [301]3 years ago
7 0
1. Coefficients are represented either relative number of molecules or moles
2. when counting the number of atoms in the formula, you multiply each component by the coefficient
3. 72 is the total atoms
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I need help on 11 plz I need a slot of help
Galina-37 [17]

mean = (sum of values) / (number of values)

we know mean is 13 and we are given 8 values. The ninth value is the missing x:

13 = ((sum of 8 values) + x)/9

13 = (12+10+15+12+13+15+11+15+x)/9

13*9 = 103+x

x = 14

The missing value is 14. There are 14 pillows in the last box.

8 0
3 years ago
Jenny has $2.40 deducted from her monthly allowance every time she forgets to do a chore. If she forgets three times in a month,
NeX [460]

Answer:

D -$7.20

Step-by-step explanation:

  1. If she takes (substance) $2.40 every times she forgets to do a chores you have to substance
  2. but first you have to multiply because she forgets 3 times
  3. 2.40 × 3 is 7.20
  4. but since she taking it away it would be negative

so your answer is -$7.20

I hope this helps

4 0
3 years ago
Jordan built a scale model of a space shuttle at a scale of 1​ to 200​. If the actual space shuttle is 54 meters long, how long
KATRIN_1 [288]
540 (100 centimeters = 1 meter, so 54 x 100 = 540.)
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2 years ago
I think I got it! It's a math problem and I hope you can see and solve this! If you can't, I tried.
denis-greek [22]
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How to find the measure of angle x
vitfil [10]
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