Answer:
17x-15 ................... I needed to put dots so I can have 20 characters
Sum of the terms of the series is
Sn = n/2 ( a1+an )
we have n= 6 , a1= 17, an = 57
so Sn = 6/2 ( 17+57) = 3(74) = 222
Answer:
i also dont know
Step-by-step explanation:
Answer:
2.25
Step-by-step explanation:
8.5-6.25
(8-6)+(0.5-0.25)
2+0.25
2.25
Answer:
162
Step-by-step explanation:
324/2 because a square has sides that are all equal, so the area is 2 times the length of a side
