How do i find area of the base for any shape?

The amount spent on food and drink by 20 customers is shown below what is the modal amount spent ?

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?