Which expressions are equivalent to 35 + 30s - 45t? a. 7⋅(5+30s−45t) b. 5(7+6s−9t) c. (−35−30s+45t)×(−1) d. 10×(3.5+3s−4.5) e. ( 35/2 - 15s + 45/2t) ⋅ (-2) choose 2 answers

We have that
35 + 30s - 45t

case A) 
7⋅(5+30s−45t)---> 35+210s-315t> is not equivalent 

case B)
5(7+6s−9t)> 35+30s-45t> is equivalent to 35 + 30s - 45t

case C)
(−35−30s+45t)×(−1)> 35+30s-45t---> is equivalent to 35 + 30s - 45t

case D)
 10×(3.5+3s−4.5)> 35+30s-45>  is not  equivalent 

case E) 
( 35/2 - 15s + 45/2t) ⋅ (-2)--->-35+30s-45t---> is not  equivalent 

the answer is
B. 5(7+6s−9t)
C. (−35−30s+45t)×(−1)

Hnmmmn not sure