How can doug use place value pattern to check his answer?

He can use it to make sure he lined his place values up properly

10 will be the number of adult tickets and 11 will be the number of children tickets. i hope i could ! good luck : )

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.