i need help with this question aka all the little questions in it. Will give brainliest!! Worth 10 pts but EXTRA if needed as payment.

Which of the following expressions is equal to 2x^2+8

Which representation has a constant of variation of -2.5

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?