joseph had 18,000 to invest . he invested part the money at 10% and the remaining part of teh moenyy at 12%. if his income from the two investiments was 2100 how much did he invest at each of the rates

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

step-by-step explanation:

the triangles are similar. therefore the corresponding sides are in proportion:

              cross multiply

            divide both sides by 32