The main purpose of a hiring a mystery guest or shopper is:
to uncover employee theft
to find ways to improve the operation
to keep employees on their toes
to catch employees when they make mistakes

To find ways to improve the operation.

Step-by-step explanation:

The main purpose of a hiring a mystery guest or shopper is: to find ways to improve the operation.

These mystery shoppers are hired by many stores or restaurants etc, to observe the services of the employees of that area.

They also measure customer service, the product quality and the work environment of their area.

Lastly, these shoppers make a report about their observations and these help to improve the operations in near future.

12

step-by-step explanation:

a triangle's   full angle is 180 degrees so 180 - 156 = 24. 24/2=12

option c) graph of line going through 1, 4 and 3, 10

step-by-step explanation:

let y equal to margo's coin collection

let x equal to number of years

at the begining x=0, y=1 → point=(x,y)→point=(0,1)

she adds 3 coins per year, then y=1+3x

at x=1, y=1+3(1)=1+3→y=4→point=(x,y)→point=(1,4)

at x=3, y=1+3(3)=1+9→y=10→point=(x,y)→point=(3,10)

the graph of line going through (1, 4) and (3, 10), then the option c is the correct.