The science club sold 25 t-shirts last week and 18 t-shirts this week. what is the percentage of decrease in the number of t-shirts sold ?
a) 72%
b) 28%
c) 39%
d) 36%

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

An appliance store sells a washer-dryer combination for $1800. if the washer costs $300 more than the dryer, find the cost for each appliance.

Which of the following tables represents exponential functions?