Factor the expression -18+42x

The perimeter of a rectangular lot of land is 436 ft. this includes an easement of x feet of uniform width inside the lot on which no building can be done. if the buildable area is 122 ft by 60 ft, determine the width of the easement. select one: a. 9 feet b. 18 feet c. 4.5 feet d. 7 feet

Which expression is the factorization of x^2+10+21

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