Which equation is in standard form ? -1-3y=2(y-2x) -14x+6y=-30 2x+3y=-5x-2y+31 2(x-y)=2

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

Maria solved an equation as shown below. what is the solution to maria’s equation?