Answer:


Step-by-step explanation:
----------- (1)
-----------(2)
Adding equation (1) and (2)


Substitute y=-4 in equation (1) or (2)


Answer:
-5/-6
Step-by-step explanation:
Use the equation rise over run, which is also y2-y1 over x2-x1
in basically every type of thing, x always comes first then y
y2=1 y1=6 x2=-2 x1=-4
1-6/-2-(-4)=-5/-6, because it was changed to, -5/-2+4
First you need to find the area of the plate.
The formula for the area of a circle is Area = pi *r^2
The radius (r) is given as 6 inches.
We will use 3.14 for pi
Area = 3.14 x 6^2
Area = 3.14 x 36
Area = 113.04 square inches.
Now to find the density, divide the total bacteria by the area:
Density = 120,000 / 113.04 = 1061.57 which rounds up to 1,062 bacteria/ square inch.
11meters long because 24-13=11 so 11 is the answer