Tianna works at a call center. Between 12 PM and 4 PM only 5% of her attempted calls pick up. Between 4 PM and 8PM, 15% of her attempted calls pick up. If she expects to make 80 calls between 12 PM and 4PM and 120 calls between 4 PM and 8 PM, how many total pick ups can she expect during her entire shift? 15
18
4
22

.05(80) + .15(120)=

4 + 18 = 22

So, the total pick ups is 22.

Step-by-step explanation:

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