Question

Which expressions are equivalent to -2.5(1 -2n) - 1.5n ?

choose ALL that are equivalent

a. -2.5n -3.5n
b. -2.5n + 3.5n
c. -2.5 - 6.5n
d. -2.5 - n(5 -1.5)
e. -2.5 + n(5 - 1.5)

Answer 1

distribute then add a(b-c)=ab-ac -2.5(1 -2n) - 1.5n -2.5(1-2n)= -2.5-(-5n)=-2.5+5n now add the other bit -2.5+5n-1.5n -2.5+3.5n B is a corect answer find others distribute and add last 2 choices D=-2.5-3.5n E=-2.5+3.5n E is correc t answers to pick are B and E