Abe plans to use $21,000 to open a savings account with an annual interest rate of 6%. how much more interest will he earn over 4 years if he chooses a compound interest account, with interest compounded annually, instead of a simple interest account?

Aflute is on sale for 20% off. including the discount and 8% tax, the sales price is $216.

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Add, subtract, multiply, or divide as indicated. list any restrictions for the variable(s) and simplify the answers when possible. 1) x-2 / x+5 + 3x / 2x-1 2) x+6 / x-6 - x^2 / x+6 3) x+9 / x-4 + x+2 / x^2-11x+28 4) x / x^2-64 + 11 / 2x^2+11x-40 5) 5 / x + 11 / x-3 - x-4 / x^2+2x-15