Please help asap 5 and 6 and 7 I need help please and thank you​

What’s the numerical coefficient of 6xy

Which diagram shows lines that must be parallel lines cut by transversal?

Pranav and molly are selling pies for a school fundraiser. customers can buy blueberry pies and pumpkin pies. pranav sold 6 blueberry pies and 4 pumpkin pies for a total of $106. molly sold 6 blueberry pies and 3 pumpkin pies for a total of $90. find the cost of each of one blueberry pie and one pumpkin pie