Answer:
C.
Step-by-step explanation:
The answer is A. The Associative Property, followed by the Associative Property.
It's because they want you to group stuff, not simplify them.
Answer:
b 8
Step-by-step explanation:
just replace the z with a 2 and solve
3(2)+2
To get the distance DC we proceed as follows:
AB-CD
=11-3
=8
BC=15
hence using Pythagorean theorem
c²=a²+b²
c=DC
a=BC
b=8
thus
c²=15²+8²
c²=225+64
c²=289
thus
c=√289
c=17 units
Answer: B. 17 units
So to find the mean you add them all together and divide by the number of numbers there is so 11+15+19+17+23+20+17+18+21=174 and there are 10 numbers so it would be 174/10 which is 17.4 so you answer is 17.4
