I know it's very trifling of me to ask this but, I do not understand. If can so much as help me with just a few that would save me a lot.

Percent increase

1. %

2. %

3. %

4. %

5. %

Step-by-step explanation:

1. $5 to $8

%

2. From 20 students to 30 students

%

3. From 86 books to 150 books

%

4. From $3.49 to $ 3.89

%

5. From 5 mile to 16 mile

%

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: