A retiree invests $9000 in a savings plan that pays 4% per year what will the account balance be at the end of the first year?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n

Abarge can safely haul no more than 400 tons across the river. the barge has an empty weight of 24 tons. the average weight of the railroad cars is 4 tons each.bhow many railroad cars can the barge haul?