Find the value of 2xy+3yz-xyz, when x=2, y=-2, z=4​

"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.

The length of a shadow of the building is 36m. the length of the pole, which is perpendicular to the ground, is 1.9m. the length of the pole's shadow is 1.52m. what is the height of the building?

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.