Questions on Algebra: Real numbers, Irrational numbers, etc answered by real tutors!

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Question 118743This question is from textbook Prentice Hall Mathematics Algebra 1
: HI I NEED HELP ON A PROBLEM THAT WORKING WITH SUBTRACTING REAL NUMBER..HERE THE PROBLEM#50.ARCHAEOLOGISTS FOUND A 1500-YEAR-OLD SHIP AT THE BOTTOM OF THE BLACK SEA.THE SHIP IS WELL PRESERVED BECAUSE OXYGEN COULD NOT MAKE THE SHIP DECAY.THE SHIP IS AT A DEPTH OF 1000FT BELOW THE SURFACE.THIS IS ABOUT 350FT BELOW THE BOUNDARY BETWEEN SURFACE WATER,WHICH HAD OXYGEN,AND WATER BELOW,WHICH DOES NOT HAVE OXYGEN.AT WHAT DEPTH IS THE BOUNDARY?This question is from textbook Prentice Hall Mathematics Algebra 1
: HI I NEED HELP ON A PROBLEM THAT WORKING WITH SUBTRACTING REAL NUMBER..HERE THE PROBLEM#50.ARCHAEOLOGISTS FOUND A 1500-YEAR-OLD SHIP AT THE BOTTOM OF THE BLACK SEA.THE SHIP IS WELL PRESERVED BECAUSE OXYGEN COULD NOT MAKE THE SHIP DECAY.THE SHIP IS AT A DEPTH OF 1000FT BELOW THE SURFACE.THIS IS ABOUT 350FT BELOW THE BOUNDARY BETWEEN SURFACE WATER,WHICH HAD OXYGEN,AND WATER BELOW,WHICH DOES NOT HAVE OXYGEN.AT WHAT DEPTH IS THE BOUNDARY?
Answer by tennisbuff07(20) About Me  (Show Source):
You can put this solution on YOUR website!
draw a picture with lines representing the water surface and boundaries, 1000 feet representing the depth of the water, a boat at the bottom of the sea, and 350 feet representing the distance from the boat to the boundary.
this will make the problem easier to solve. after you draw the picture, write a psuedo-formula to represent the picture.
1000 total feet = 350 feet plus unknown number of feet to boundary
this means that the water depth is 1000 and 350 feet has no oxygen. the other water does have oxygen
subtract 350 feet from both sides to get
650 feet=unknown number of feet to boundary
check your answer by plugging 650 feet into the formula or into your picture to see if it all makes sense.