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finlep [7]
3 years ago
10

An arrangement of marbles has 12 marbles in the first row and 10 rows in all. In each successive row one marble is added.What is

the explicit rule for this situation, and how many marbles will be in the 10th row?Drag and drop the answers into the boxes to match the situation.Explicit ruleNumber of marbles in the 10th rowAn = 11 + 11n, An = 12 + n, An = 11 + n, An = 12 + 10n, 19, 20, 21,
Mathematics
2 answers:
sergiy2304 [10]3 years ago
6 0

Answer:

A(n)=11+n

Step-by-step explanation: took test

bogdanovich [222]3 years ago
5 0

The explicit rule for the number of marbles in 10th row is An= 12+ n-1.

<u>Step-by-step explanation</u>:

  • Total number of rows = 10 rows
  • The number of marbles in the 1st row = 12 marbles
  • One marble is added to each successive row

Therefore, for the remaining 9 rows out 10 rows ⇒ 9 marbles are added.

  • The number of marbles in the 10th row = 12+9 = 21 marbles.
  • The explicit rule is An = 12 + n-1

For n= 10, then

⇒ A10 = 12 + (10-1)

⇒ A10 =12+9 = 21

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Answer:

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Read 2 more answers
Solve for P:<br><br> 9(p−4)=−18<br><br> Please Explain
vekshin1

Answer:

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Step-by-step explanation:

Happy to help.

When we have numbers in parenthesis, we generally want to deal with those first. However, we can hit a rough patch when a variable is in there. Consider this:

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That leaves us with the same answer—14! We can apply this to a variable, and that will help us figure out 9(<em>p</em> - 4), or the left side of your equation you presented.

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Add 36 on both sides to isolate the variable (in this case, <em>p)</em>

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You can also write it like this; 9<em>p</em> = 36 - 18

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Divide 9 to isolate <em>p</em>

<em>p</em> = 2

So, we would get (<em>p</em> = 2). Make sure to practice a few more questions like these to really get the hang of it—you'll be using this a lot in the future!

Good luck!

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