When a tree 5 m high cast a shadow 7 m long how long is a shadow cast by a person 2 m tall write a proportion and solve

Given this information, which expression must represent the value of b?

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

1. what expression would be the same as 6x+x+0 2. find the prime factorization of 60 3. write the expression for 6 + x in words.