Which expression has been simplified using the correct procedure? O 5+3(x+3) 5 + 3x + 9 3x + 14 4 + 3(x - 2) 7(x-2) 7x - 14 O 2 - 4(x + 3) 2-44-3 -44-5 o 6-2(x-2) 6-2x-2 -2x - 4

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

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.