A farmer raises goats and cows. Each goat requires 400 square feet of grazing area and each cow requires 1,200 square feet of grazing area. The farmer has 36,000 square feet for grazing area. Write a function to
represent the combination of goats and cows that the farmer can raise. Let a represent the number of goats,
and y represent the number of cows.

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.