Please help, how to solve these two problems, whoever does this will recieve 30 pts and a brainlist. :)

What is the slope simplify your answer and write it as a proper fraction, improper fraction, or integer

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.

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.