okay31213 okay31213

21-04-2020
Mathematics

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A brick staircase has a total of 20 steps The bottom step requires 100 bricks. Each successive step requires 3 fewer bricks than the prior one. How many bricks are required to build the staircase?

A) 2570 bricks

B) 1400 bricks

C) 2860 bricks

D) 1430 bricks

Respuesta :

saiyangod135 saiyangod135

21-04-2020

Answer:

1430

Step-by-step explanation:

just write on a piece of paper 1 through 20 and then right 100 and then keep subtracting 3 each number you give a number to. then add them all up

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