Help me please There are 9
9
books stacked on a shelf. The thickness of each book is either 1
1
inch or 2
2
inches. The height of the stack of 9
9
books is 14
14
inches. Which system of equations can be used to determine x
x
, the number of 1
1
-inch-thick books in the stack, and y
y
, the number of 2
2
-inch-thick books?
F. x+y=14x+2y=9
x+y=14x+2y=9

G. x+y=92x+y=14
x+y=92x+y=14

H. x+y=9x+2y=14
x+y=9x+2y=14

J. x+y=142x+y=9
x+y=142x+y=9

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

Need this at the city museum, child admission is 6 and adult admission is 9.20. on tuesday, 132 tickets were sold for a total sales of 961.60. how many adult tickets were sold that day?

An oil exploration company currently has two active projects, one in asia and the other in europe. let a be the event that the asian project is successful and b be the event that the european project is successful. suppose that a and b are independent events with p(a) = 0.2 and p(b) = 0.8. (a) if the asian project is not successful, what is the probability that the european project is also not successful? (b) what is the probability that at least one of the two projects will be successful? (c) given that at least one of the two projects is successful, what is the probability that only the asian project is successful? (round your answer to three decimal places.)