Is it a leap year? haha. But for real your anser will be May 11, 2009
The standard deviatiion is the square root of the variance.
Plz mark me brainliest if it was useful for you !!!
Ans is 86 - 14x
Steps in image :-
Answer:
b=15
Step-by-step explanation:
7(b+1)=2*56 (we cross multiply)
7b+7=112
7b=105
b=15