Answer:
the expressions are not shown
Step-by-step explanation:
Answer:
→ Mean of given data = xi = (86 + 49 + 63 + 90 + 82 + 98 + 36) / 7 = 504 / 7 = 72 .
→ variance of the set of data = 525
Step-by-step explanation:
Hope it is helpful....
Answer:
Step-by-step explanation:
9x - 7y = 24
3x + y = -2
9x - 7y = 24
-9x - 3y = 6
-10y = 30
y = -3
3x - 3 = -2
3x = 1
x = 1/3
(1/3, -3)
Answer:
15.98
Step-by-step explanation:
just use a calculator