What is -3x^2-12x-10 in vertex form? ?

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

What is the missing step in this proof ?

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?