Answer:
the standard deviations 12.2 if I'm correct.
I believe that 21 is d 27 over 17
I believe that 22 is d because 16 divided by 3.20 is 5
sorry if I am wrong
I hope this helps you
Okay, to start, when dividing fractions, one thing I use is to flip the numerator and denominator of the divisor and change the division sign to a multiplication sign so it would look like this:
-7/2*5/7
Then, you would multiply straight across and you would get -35/14 which simplifies to -5/2.
The number could be any multiple of nine that ends in 4 or 9, like 9, 54, 99, 144, etc.
Answer:31/30
Step-by-step explanation:
11/15+3/10
find common denominator=30
11/15 times 2/2
22/30
3/10 times 3/3
9/30
22/30+9/30=31/30
