Rolex borrowed 3600 from a credit union for 6 months at an interest rate 10% per year. how much did he owe the credit union at the end of the six months?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

If x+y+z=0 what is the value of [tex] {x}^{3} + {y}^{3} + {z}^{3} [/tex]