If the length, in feet, of the first room is (2x+7) and the length, in feet, of the second room is (2x - 1). which expression models the area, in square feet, of the new room once the wall is knocked down? A. 6x +12
B. 4x2+18
C. 4x^2+ 13x - 4
D. 4x^2 +18x +18

Browning labs is testing a new growth inhibitor for a certain type of bacteria. the bacteria naturally grows exponentially each hour at a rate of 6.2%. the researchers know that the inhibitor will make the growth rate of the bacteria less than or equal to its natural growth rate. the sample currently contains 100 bacteria.the container holding the sample can hold only 300 bacteria, after which the sample will no longer grow. however, the researchers are increasing the size of the container at a constant rate allowing the container to hold 100 more bacteria each hour. they would like to determine the possible number of bacteria in the container over time.create a system of inequalities to model the situation above, and use it to determine how many of the solutions are viable.

The table represents a linear function. what is the slope of the function? –6 –4 4 6

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path