Question

Fat has more than twice as many calories per gram as carbohydrates and proteins. A gram of fat has about 9 calories, while a gram of carbohydrate or protein has about 4 calories. The expression below represents the total number of calories in a food item.
9x+4(y+z)

What does the term 4(y+z) represent?

A. the number of grams of fat in a food item
B. the number of calories in a food item from fat
C. the number of grams of carbohydrates and proteins in a food item
D. the number of calories in a food item from carbohydrates and proteins

Answer 1

C.

y and z represent either proteins or carbohydrates, while x represents fats.

Answer 2

D. the number of calories in a food item from carbohydrates and proteins

hope this helps

since y and z stands for carbonhydrates & proteins, due to the fact that they both = 4 calories per gram