I need to know how to subtract factions, and it's really confusing and all I'm asking for is if anywon dose answer this can you just tell me some tricks to it or something? I really need some help. ​

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Can somebody me out with this question

Which part of a 2-column proof is the hypothesis of the conjecture? a) given b) reasons c) prove d) statements ! i think it's b but i'm not quite