Point Z is the circumcenter of LMN. Which must be true? AN=LB NC=BZ BMZ=CMZ ZBM=ZCM

true

explanation:

x

step-by-step explanation:

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour