How many streetlights will the city have at the end of 51 weeks?

Question

A city currently has 137 streetlights. As part of a urban renewal program, the city council has decided to install 3 additional streetlights at the end of each week for the next 52 weeks.

How many streetlights will the city have at the end of 51 weeks?

______ streetlights

Answer 1

S0 = 137

S1 = 140

S2 = 143

SN = 137 + 3N

S51=137+3(51) = 137+153= 290

3x51 = 153

137+153 = 290 street lights after 51 weeks