How do captions understand the main idea

Un numero consta de dos cifras cuya suma es 9.si se invierte el orden de las cifras el resultado es igual al numero dado mas a unidades. halla dicho numero.

Which of these statements about the cpp supports the sub-claim that it cleans the air? a. the cpp cuts particle pollution, nitrogen oxides, and sulfur dioxide by more than 25 percent. b. the cpp avoids up to 6,600 premature deaths. c. the cpp cuts electricity bills roughly 8 percent. d. the cpp provides americans with reliable and affordable power.

Reading journal for american literature just fill out the 10 questions 100 points