A box contains a total of 12 books. Each hardcover book weighs 2 pounds, and each paperback book weighs 1 pound. the total weight of this book is 16 pounds the equation of the graph is

x + y = 12 2x + y = 16

find the number of the hard and paper covers:

A: 4 hardcover and 8 paperback

B: 8 hardcover and 4 paperback

C: 8 hardcover and 12 paperback

D: 6 hardcover and 6 paperback

step-by-step explanation:

one of the most important purposes of surface treatment is to alter surface properties according to the requirement of specific applications. for example, hydrophobic coating has been utilized on windshield and eyeglasses. gold atom monolayer on substrate has become a popular surface bioconjugation strategy.  

a=24; b=12

step-by-step explanation:

a/b=2: 1

a=2b

36/(1+2)=12

b=12

a=24

the correct option is b

step-by-step explanation: