Which of these is an algebraic expression? *

3 - 1.4
1.4 -3
1.4 - n

The constitution gives congress the power to create federal courts lower than the supreme court higher than the supreme court equal to the supreme court, unaffected by the supreme court.

Helena lost her marbles. but then she found them and put them in 44 bags with mm marbles in each bag. she had 33 marbles left over that didn't fit in the bags.

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9