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grigory [225]
4 years ago
13

I’m not sure about this question can someone help me please

Mathematics
1 answer:
Ksju [112]4 years ago
5 0
-10y^2
Explanation: when combining like terms everything cancels out except for -10y^2
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The following are the ages (years) of 5 people in a room:
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Explanation:

Let x be the age of the person who enter the room

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3 years ago
Find the sum of the first 63 terms of –19, -13, -7 …
Degger [83]

You can tell this is an arithmetic sequence because it is a list of terms beginning with -19 that increase by 6 each term. Because of this, we can use the formula for the sum of an arithmetic sequence, which is:

S = \dfrac{n}{2}[2 a_1 + d(n - 1)]

  • n is the number of terms in the sequence
  • a_1 is the starting term
  • d is the common difference among the terms

In this case, we can see that n = 63, a_1 = -19, and d = 6. Thus, we can use the formula:

S = \dfrac{63}{2} [2(-19) + 6(62)] = 10,521


Our answer is 10,521.


7 0
3 years ago
leaving the water running while brushing your teeth can use 11 Liters of water. how many milliliters is 11 liters
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1 liter = 1,000 milliliters
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Quizlet !! just saw this on there !!
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