Which relation is a function?

a.
{–2, 10), (–6, 10), (–2, 3)}

b.
{(0, 3), (0, 9), (12, –4)}

c.
{(5, 5), (5, 9), (5, 15)}

d.
{(–5, 1), (4, 9), (6, 10)}

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate

Find the area of a parallelogram with base 15 yards and height 21 2/3

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?