One recipe for cereal bars uses 5 cups of cereal and 2 1/2 cups of nuts. a different recipe uses 3 cups of cereal and 1 cup of nuts. which recipe is more nutty?

What is the value of 1/3x + 7x when x = 5

Precalculus question, image attached.

Amir wants to proportionally increase the size of a photo to create a poster for his room. the size of the original photo is shown. complete the statement and then answer the question to represent ways that amir can increase the size of his photo.