Simplify: [5-3x+2y-(2x-y)]-(3x -7y+9)

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

The expression 1.01*1.005(^t) gives the amount of money, in thousands of dollars, in carter's savings account (t) years after he opens it. what does 1.01 represent in this expression?