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absolute values. the sum will have the sign of the addend with the greater absolute value.
-3+5=2
1-31 < 51, so the sum is positive.
paula dives into a swimming pool from a diving board 2 feet above the
water's surface. she descends to a depth 7 feet below the diving board.
how far is paula from the surface of the water?
1. what integer represents paula's starting height above the water?
2. what integer represents the total distance paula descends?
3. write an addition expression to represent paula's distance below
the water's surface.

Let us imagine that the number of automobile accidents in a certain region are related to the regional number of registered automobiles in tens of thousands (b1), alcoholic beverage sales in $10,000 (b2), and decrease in the price of gasoline in cents (b3). furthermore, imagine that the regression formula has been calculated as: y = a + b1x1 + b2x2 + b3x3 where y = the number of automobile accidents, a = 7.5, b1 = 3.5, b2 = 4.5, and b3 = 2.5 calculate the expected number of automobile accidents for a football weekend if the region has 25,000 registered vehicles, $75,000 worth of beer is sold, and a gas war causes a 10 cent drop in a gallon of gas.