Find the value of k, if 3x+ky-1=0,7x-3y+3=0 are perpendicular.

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

What are the sotions to the quadratic equation 9x^2=4

The table shows the balance of a money market account over time. write a function that represents the balance y(in dollars) after t years.