I Need Help With This Its Due In An Hour

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.

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Marla bought a book for $12.95, a binder for $3.49, and a backpack for $44.99. the sales tax rate is 6%. find the amount of tax and the total she paid for these items