A man bought 4 cups of coffee and left a $7 tip. A woman bought 8 cups of coffee and only left a $2 tip. If they paid the same amount, how much was each cup of coffee? Write and solve an equation for the situation.

Which expression is equivalent to -5(3x - 6/7)

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?