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The number of bricks on the bottom row was 21, and each row above it had 2 fewer bricks. If there were 11 rows in the stack of bricks, how many bricks were there altogether?
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The number of bricks on the bottom row was 21, and each row above it had 2 fewer

bricks. If there were 11 rows in the stack of bricks, how many bricks were there altogether?

User Pankrat
by
3.6k points

2 Answers

4 votes

Answer:

121

Explanation:

21-2x

add all of the sums from 0 - 11

User Lakerfield
by
3.6k points
4 votes

Answer: 121

Explanation:

User Ejoubaud
by
3.5k points
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