Let the missing number be x
Mean is the total sum of data over the number of data therefore,
(11+20+x+3+1) / 5 = 9
Then simplify
(35 + x) / 5 = 9
Then multiply 5 to both sides
35 + x = 45
Then subtract 35 to both sides to find x
X= 10
Hope this helps!
25.5 ; you do 30(.15) = 4.50 and that is your difference therefore you do 30 - 4.50 which equals 25.50 as your sale price. i’m
I’m pretty sure that it’s 3/0.5 Hope I helped
A=square root of 3 over 4 times a^2
