Question

Can someone please help me?


A child is creating a pyramid with building blocks. The top three levels include 3 blocks, 7 blocks, and 11 blocks.

Part 1: How many blocks would be needed for a pyramid 25 levels tall? (5 points)

Part 2: Use complete sentences to explain how a sum of an arithmetic series was applied. (4 points)

Answer 1

what is the sequence

Answer 2

3,7,11, find the difference between each number

Answer 3

it goes by +4

Answer 4

yes, so your d in formula is equal to 4
formula Sum=a+(n-1)d

Answer 5

where a=the first number in the sequence, in this case is 3

Answer 6

and n is the nth term, and again in this case is 25

Answer 7

so it would be 4=3+(25-1)(4)

Answer 8

?

Answer 9

Sum=3+(25-1)4

Answer 10

99 blocks

Answer 11

ooohh k thanks