I need help with these two geometry problems. Do not put up a link to a site. I cannot view images from others sites other than this one. (Please no sin/cos/tan)

**Find the value of each variable.**

Complete the table for different values of x in the polynomial expression -7x2 + 32x + 240. then, determine the optimal price that the taco truck should sell its tacos for. assume whole dollar amounts for the tacos.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.