How do you rewrite an expression using i

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.

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

What is the solution to the system of equation graphed belowa.(0,-4)b.(2,5),1),-3)