Determine the value of a if one solution to the quadratic equation is x equals 5 + 3/2 i

Which expression gives the area of the triangle shown below

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

Which of the following shows the length of the third side, in inches, of the triangle below