Select all the expressions equivalent to 7^-2 x 7^5 x 7^-3

"you know, playing tennis is healthier than watching a tennis match on television," katya remarked to her couch potato brother. in this sentence, healthier is a/an a. superlative. b. comparative. c. positive form. d. adverb.

Find the value of x for which abcd must be a parallelogram -9-6x x-30

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take