Oliver started his own lawn mowing business. In the spring he made ten dollars mowing lawns and in the summer he made thirteen dollars. If he had to spend thirteen dollars
buying supplies, how much money did he end up with?

Simplify using positive exponents only.

Twice the sum of a number and 2 is equal to three times the difference of the number and 8. find the number.

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.