12% of the cars sold by car dealer a were hybrid cars. 20% of the cars sold by car dealer b were hybrids. which statement must be true?
if both car dealers sold 50 total cars, dealer b sold 4 more hybrid cars.
car dealer b sold more hybrid cars than did car dealer a.
if both dealers sold the same total number of cars, car dealer b sold 8 more hybrids.
if car dealer b sold 120 total cars, 20 of them were hybrids.

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.