2019-2020 pre-calc unit 2 test
directions: answer the following question(s).
the number of a certain bacteria in a sample of
refrigerated food product is given
by, n(c)=10,c2-20c+600, where c is degrees
celsius. evaluate n(5) and describe the meaning
of your answer.
in 200-26
m
in
function to describe the given graph:

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is