Gwen ordered a set of red and orange pins. She received 100 pins, and 20% of them were red. How many red pins did Gwen receive?

5

Step-by-step explanation:

100 divided by 20 is 5

20

Step-by-step explanation:

first convert the percent into a decimal( so 20% = 0.2)

then multiply by the total number of pins (0.2 x 100=20)

there you have it! your answer is 20 pins out of a 100 are red

56

step-by-step explanation:

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: