NEED HELP ASAP

Choose Yes or No (for each one) to tell whether the expression represents a 20% discount off the price of an item that originally cost d dollars.
0.8d

d – 0.2

d – 0.2d

1 – 0.2d

When are two distinct non vertical lines parallel

Which matrix multiplication is possible?

Afamily of five rents a kayak and splits the total time, k, equally. each family member spent less than 25 minutes kayaking. which values can be used to complete the math sentence below so that it accurately represents the situation? intro done