Look at this convex polygon. How many triangles are formed by drawing all the diagonals from a single vertex

Karen is financing $291,875 to purchase a house. she obtained a 15/5 balloon mortgage at 5.35%. what will her balloon payment be? a. $220,089.34 b. $219,112.46 c. $246,181.39 d. $230,834.98

Simply 8x squared + 5(7x squared- x) - 2x =

Can any one me with the answers to these questions asap?