Which explanation correctly solves this problem?

chris was putting a railing on his deck. at the end of the day, he had 11.5 feet of railing left over. during the day, he had used two 1.5-foot-long piece of railing, one 3.25-foot-long piece of railing, and one 6-foot-long piece of railing.

how many feet of railing did chris have at the beginning of the day?

a.
start with 11.5. multiply 11.5 by 2. add 1.5 and 3.25 and 6.

b.
start with 11.5. multiply 1.5 by 2. add this product to 11.5. then add 3.25 and 6 to the answer.

c.
start with 11.5. add 1.5 and 3.25 and 6. multiply the answer by 2.

How can the correlation in the scatter plot graph below best be described? positive correlation negative correlation both positive and negative no correlation

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.

Solve -3 (r + 5) = -9 enter ur answer in the box x = __