Ou are calculating how many seats there are at Wembley Stadium in London, England. You count that there are 3,750 rows. Each row has 24 seats. How many seats are there in the whole stadium

3x+9+4x+x=8x+9that's the answer for your question.

If gravity is one third on mars then weight also one third on mars

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.