NO NEED TO SOLVE JUST determine if its geometric series or geometric sequence or arithmetic seriesA fireplace contains 46 bricks along its bottom row. If each row above decreases by 4 bricks, how many bricks are on the 12th row?

Question

anonymous · Answer

46,42,....
a =46
d = -4
12th row means n= 12
tn = a+(n-1)d
tn =46+(11)*(-4)  = 46 - 44 = 2 bricks

jim_thompson5910 · Answer

You're decreasing the number of bricks by a set amount each time (in this case 4)


So this is an arithmetic sequence.