Which expression is equivalent to -3 - (-12)
A.-3+(-12)
B.-3+12
C.3+12
D.3+(-12)

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?

6x + 3y = -6 2x + y = -2 a. x = 0, y = -2 b. infinite solutions c. x = -1, y = 0 d. no solution

Collin did the work to see if 10 is a solution to the equation r/4=2.4