What is indicated by arrowheads on a line

The cash price of a television is $580.the hire-purchase price of the television is $865.the hire-purchase price is an initial deposit of n% of the cash price and 6 equal monthly payments of $120.find the value of n.

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120