Answer:
16/19
Step-by-step explanation:
Answer:
300
Step-by-step explanation:
every lamp can connect other lamps ，from the first ，it can connect the other 24 lamps，and then， the second ，can also connect other 24 。but the line between the first and the second is counted twice。
so it would be：
（1+2+3+...+24）×24÷2=300
Answer:
the last one
Step-by-step explanation:
uv
Let the number be n.
Then:
n^2 + (1/n)^2 = 82/9; find n. Find the LCD; it is 9n^2.
Mult all 3 terms by 9n^2:
82*9n^2
9n^4 + 9 = (82/9)(9n^2) => 9n^4 + 9 = ------------
9
Then 9n^4 - 82n^2 + 9 = 0
I used my graphing calculator to find that n = 3.
Let's check: is 3^2 + (1/3)^2 = 82/9?
Is 9 + 1/9 = 82/9?
Is 81 + 1 = 82? YES. So, n=3 is a solution.
The commmutative property says that ab=ba, you can change the order
the identity property is 1 times a=a
the distributive is a(b+c)=ab+ac
associative is moving parenthssees with multiplicaon and addiotn or a(bc)=(ab)c
the answer is commutative property since you change the order
