Which expressions are equivalent to y ⋅ 2 1/2 PLEASE HELPS :(... A) 2y + 1/2

B) 2y + 1/2y

C) y (3 − 1/2)

D) y ⋅ 3−1/2

E) y ⋅ 3 − y ⋅ 1/2

2.5 milligrams is equivalent to how many grams

Ineed someone to me answer my question i have to have this done and knocked out

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.