A rock-climbing gym charges nonmembers $18 per
to use the wall plus $7 per day for equipment rental. Members pay an
annual fee of $400 plus $5 per day for equipment rental. How many days must both a member and a nonmember use the wall in one year both pay the same amount

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers

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.