Step-by-step explanation:
sum of the arithmetic sequence
a1 = 8
a2 = a1 + 8 = 8+8 = 16
...
an = 8×n
the sum of the first n elements of such a series is
n/2 × (2×a1 + (n - 1)×d]
with d being the difference between 2 consecutive elements (= the added constant).
so,
s30 = 30/2 × (2×8 + 29×8) = 15×(31×8) = 3720
Y/22 would be the answer to your question.
Both side multiply by one number.
Answer:
Jane got on 16 rides
Step-by-step explanation:
r= numbers of rides
25 + 2r
25 + 2r = 57
-25 -25
_____________
2r\2 32/2
r=16
