How would u find the simple interest principle= is 10,400; rate = 12.5%; time= 11 years

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

Haley buys 9 pounds of apples for $3. how many pounds of apples can she buy for $1?

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28