What is the value of the expression when a= -5 and c = -1 8a+16c

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

Darragh has a golden eagle coin in his collection with a mass of 13.551\,\text{g}13.551g. an uncirculated golden eagle coin has a mass of 13.714\,\text{g}13.714g.