Which of these angles are supplementary? a. 100o and 90o b. 78o and 102o c. 54o and 146o d. 12o and 78o

B. 78o and 102o

Step-by-step explanation:

Supplementary angles add to 180 degrees

A. 100o and 90o

100+90 = 190   NO

B. 78o and 102o

78+102 = 180   YES

C. 54o and 146o

54+ 146 = 200 NO

D. 12o and 78o

12+ 78  90    NO  These are complementary

$15 each

step-by-step explanation:

$45/3 children= $15 each

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,