Answer:
Step-by-step explanation:
arithmetic sequence: 60,68,76,......
a = 60
d = 68 - 60 = 8
an = a + (n-1)*d
a20 = 60 + 19 * 8
= 60 + 152
= 112
There are 112 seats in the 20th row
Answer:
139
Step-by-step explanation:
a pentagon has degrees that add up to 540 so considering youre given 401 degrees the remaining angle has to be 139
Answer:
v=4/3 pie r ³ you would put 8 in
Step-by-step explanation:
the formal
Answer:
if im looking at it correctly it should be the third one / c
Step-by-step explanation:
E is the midpoint so it's HALF of DF
Since it's half that means DE and EF have the same length.
Therefore DE multiplied by 2 is DF.
Considering DF is the full length.
