It'd be easier to do #18 if y ou were to break it up:
14* (first term + 14th term)
Sum from n=1 to 14 of n = S = ---------------------------------
14 2
14(1+14)
= ---------------- = 7(15) = 105
2
The sum of twice that is 210. The sum of "1 from n=1 to n=14" is just 14.
The final sum is 210 + 14 = 224 (answer)
Answer:
the answer is RS=x+5
if I am right mark it as brianliest
5 years because when you divide 90 by 18 to get how many years it takes the tree to grow to 90 inches tall, you get 5.
Answer:
depending on the fraction you are using, or the answer is impossible.
Step-by-step explanation:
any fraction, so to speak 0/10 is an impossible probability, or 0%
2/5 of 30 = 12
30 + 12 = 42
£42
