28. The value of 'x' and 'y in the parallelogram ABCD, Where diagonals intersec at 'O',OA = x - y,
OB = 15, OC = 8 and OD = y-6.

A) x = 17, y = 9
B) x = 29, y = 21
C) x = 9, y = 21
D) x = 21, y = 17

B is the answer

x=29 and y=21

Step-by-step explanation:

diagonals of parallelogram bisect each other . so AO will be equal to OC and OB will be equal to OD

the answer is 510

step-by-step explanation:

15 • 13 = 195

15 • 12 = 180

15 • 5 = 75

12 • 5 = 60

195 + 180 = 375

375 + 75 = 450

450 + 60 = 510

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation: