Write an explicit formula for the sequence--4,1,6,11

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each,and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent.how much did jame pay at the end?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

What is always true about a positive integer raised to a negative odd power?