Hakim invests $700 in a bank that pays 5% simple interest annually. after one year he uses the money in his account to buy a computer. the original cost of the computer is $750.00 . the computer is on sale for a 20% discount off of the original cost. the sales tax is 4% of the sale price. after purchasing the computer, how much does hakim have left in his bank account? show your work.

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?

Stacey filled her 1/2 cup of measuring cup seven times to have enough flour for a cake recipe how much flour does the cake recipe calls for

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?