Amodel house is 12 cm wide. if it was built with a scale of 3 cm: 4m then how wide is the real house

Then it would be 16 meters wide.. 12 divided by 3 is 4, so 4x4 is 16 which would be the width of the real house.

Scale:actual=3cm:4m
actual:scale=4m:3cm

so
if a model house is 12cm then what is actual?
?m:12cm=4m:3cm
make into fractoin
?m/12cm=4m/3cm
times both sides by 12cm
?m=48cm m/3cm
?m=48m/3
?m=16m
the real house is 16m wide

It says in the questions that it is 6.5?

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,