Answer this needs to go to school tomorrow

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

What are the greatest common factor of 75 and 30

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.