18 cookies were evenly distributed between 3 people what is the unit rate

The sum of two numbers is 86, and their difference is 20. find the two numbers

Which graph represents the equation y =4x

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.