The number 1953 R8T9 467 is a valid card number when verified by the Luhn Algorithm. R and T are each single digits of the number such that R is less than T. Determine all possible values of R and T.

Simplify this expression. 8x 16(x + y)

Solve 13 + w/7= -18 (w/7 is a fraction)

Which option identifies how kevin should proceed in the following scenario? four years ago kevin designed an mp3 player for young children. now that technology has changed, he would like to update his design to ensure that it encompasses cutting-edge techniques. by creating a third-angle projection of his ideas by designing an isometric projection of his new ideas by referring to past designs and illustrations of his original model by conferring with engineers who have improved upon similar devices