4. Expand and simplify the expression: (2 points)
x(4y + 2)
4xy + 2x
Ox(y + 2)
4xy + 6x
12xy + 3x

5. Expand and simplify the expression:
(2 points)
2 (3x - 1.2 + 4)
6x + 5.6
O 12x + 4.6
9x + 4.6
4x + 6.6
Can some one help me answer these two questions.

What are “like terms”? why can we only add like terms?

Liz is shipping a package to her friend.the maximum weight of a medium flat-rate box is 20 pounds,including the box which weighs 6 ounces.write and solve an inequality to describe the possible weight ,w, of the contents that liz will ship to her friend if she must use a medium flat-rate box.

Choose the more precise measurement. 26.4 cm or 8.39 cm