You might need: Calculator Dr. Potter provides vaccinations against polio and measles.
Each polio vaccination consists of 4 doses, and each measles vaccination consists of 2 doses. Last year, Dr.
Potter gave a total of 60 vaccinations that consisted of a total of 184 doses.
How many polio vaccinations and how many measles vaccinations did Dr. Potter give last year?
Dr. Potter gave
polio vaccinations and
measles vaccinations

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