The answer is 23.2 I just entered the data into an online standard deviation calculator.
15%=3
5%=1
5(20)=100
1(20)=20
So, there are 20 students in the class.
Answer:
S={( 1 )}
Step-by-step explanation:
-3x²+6x+1=4
-3x²+6x+1-4=0
-3x²+6x-3=0
∆=b²-4.a.c
∆=(6)²-4.(-3).(-3)
∆=36-36
∆=0
x'=x"=-b/2a=-(+6)/2.(-3)=-6/-6=1
Answer:
A
Step-by-step explanation:
Hope it helps!
Add all the sides then divide by how many sides it is
