42km in 180 minutes how many km per hour

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

What is the slope of the line that contains the points (-2,1) and (0,-3)

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?