Vitaly cracks open a piggy bank and finds $4.05 (405 cents), all in nickels and dimes. there are 9 more dimes than nickels. how many nickels does vitaly have?

Round 0.866 to the nearest hundredth

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?