Question

If 2d = 5c, then all of the following are true except _____.

a. 2/5=c/d

b. 5/2=d/c

c. 2/c=5/d

d. 2/d=5/c

Answer 1

The answer is D because d and c are already on the sides of 2 and 5 and therefore can not be divided by each other to get that answer.

Answer 2

2d = 5c

2/5 = c/d ...true
5/2 = d/c...true
2/c = 5/d...true
2/d = 5/c....not true