Trapezoid ABCD has an area of 57. BC = 7 and AD = 12. What is the height of the trapezoid?

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*

Acircle has a circumference of 7.850 units. what is its radius?